Homework Help Thread

[maximoose666]

I figured it was time to start a thread for help with homework. Anyone struggling with anything, post it here, as someone somewhere in CB will almost certainly have the answer or be able to help :)

Sandal says this thread doesn't exist so dont get angry with me if it does XD

[aezirka]

Very good idea, maximoose666.

I'll be glad to help other members. I might need help sometime in the future, too, who knows.

[saycheese]

if anyone could give me a link to a summerised chinese history. and no, i cant read chinese, juz read something about this general white, got abit interested.

[WizKid77]

how's this?

http://www.lycos.com/dir/arts/literature/world-literature/chinese/

or

http://www.benbest.com/history/China.html

and one more for good luck

http://www.fi.muni.cz/usr/wong/teaching/chinese/notes/node3.html

[aezirka]

if anyone could give me a link to a summerised chinese history. and no, i cant read chinese, juz read something about this general white, got abit interested.

I suppose it has something to do with the debate over at the Debates section? Oh well, I could be totally wrong.

Anyway, for a general history I suppose you could go to wikipedia.org.

[saycheese]

rofl wtf, i honestly dont pay any attention to debates section and juz partially spam there

edit: oh yea tks for links, gonna have a lok now

[WizKid77]

hey no prob. And go with aezirka's idea with wikipedia.org they've got everything on that site.

[Caity_walsh]

does any 1 know a gd site 2 find aboriginal language ? i need it 4 an assignmet n im stressin out !

[saycheese]

^ be more specifc

[Shinji]

Maybe this helps http://www.dnathan.com/VL/austLang.htm

[Ios]

he does anyone here knows what the elizabethan world picture is?
(I don't mean the book)

[M_A]

I gotta say, this is a brilliant idea for a thread.
Anyway, does anyone know any sites comparing marxism to other types of governments? If it's just about marxism it's ok, too.

[Byakuya7]

Marxism is an ideal that emerged from the ideology of Karl Marx. I believe that he wrote the communist manifesto and believed that there is always a relationship between oppresor and the oppressed(bouegeios and proletariat). For information concerning him I would consult this link.

http://www.anu.edu.au/polsci/marx/

Generally, Marx and his ideas reflect communism as the ideal form of government rather than socialism because he somewhat believed that violence is acceptable to create a stolid reformation. Im just going on what little facts I can remember, the link may help you out a little more. As for what types of governments contrast to Marxism, I would say that socialism, utilitarianism or a democratic republic would differ from it greatly.

[M_A]

Marxism is an ideal that emerged from the ideology of Karl Marx. I believe that he wrote the communist manifesto and believed that there is always a relationship between oppresor and the oppressed(bouegeios and proletariat). For information concerning him I would consult this link.

http://www.anu.edu.au/polsci/marx/

Generally, Marx and his ideas reflect communism as the ideal form of government rather than socialism because he somewhat believed that violence is acceptable to create a stolid reformation. Im just going on what little facts I can remember, the link may help you out a little more. As for what types of governments contrast to Marxism, I would say that socialism, utilitarianism or a democratic republic would differ from it greatly.
Thanks for the link and information, Buyakuya7. This will help me in my research. This thread is a life saver.

[unwaken]

Hey peeps! I'm taking a creative thinking course and it's killing me! :doindadom

So I have loads of these kind of questions. Give me a hand pretty pls? :biggrinlo

Alright, here goes:

The kind had died some time ago and the queen replaced him on the throne as Head of State. They had 2 children who were twins. Both delivered at birth by caesarean section and both were born at exactly the same time.

A King was chosen. One of the two was very intelligent and loved by everyone, but the other was not so bright. He was not like at all and was not favoured by the queen or the people in their parliment. It was the latter who was chosen. Can you work out why?

Here are the clues:
1. There was no corrupt movies involved.
2. The constitution was used to elect the king
3. The intelligent child did not die and was not harmed or locked away.
4. The queen agreed with the decision.
5. Foreign powers were not involved.
6. Marriage did not form part of the decision.

P.S. I don't know the answer myself T_T but I do know that the answer is supposed to be logical.

[Tensa Zangetsu]

^^ erm you cant be born at the same time its one after the other its imposible any other way. Anyway with the dip shit as king the other one can prob get by alright by himself as hes smart whereas the other needs a hand in life, whereas the stupid one needs to be supported etc.

[Shinji]

he does anyone here knows what the elizabethan world picture is?
(I don't mean the book)
http://en.wikipedia.org/wiki/Elizabethan I haven't read through it but you'd probably find something there.

[unwaken]

hmm you can be born at the same time I think. If its C-section then you can remove the twins at the same time, no?

GAH! T_T I have like tons more of this kind of question. my tutor is trying to kill me, I tell you! *WAILS*

[hawkmun]

Here are the clues:
1. There was no corrupt movies involved.
2. The constitution was used to elect the king
3. The intelligent child did not die and was not harmed or locked away.
4. The queen agreed with the decision.
5. Foreign powers were not involved.
6. Marriage did not form part of the decision.
P.S. I don't know the answer myself T_T but I do know that the answer is supposed to be logical.

Waiving the idea that two babies can or cannot be born at the same time, it isn't important to the problem, I agree that it's because the stupid child needs a hand in life. A smart child can be educated and lead a strong, leadership role without a crown, he can also act as ad advisor to the stupid child. On another note, a stupid child is easier to manipulate. If something were to happen... say a war, the stupid child would be easier to get to do things that would be nessisary.

[captain_soifon]

chemistry question: what are two ways to modify a metal? one of them is to heat it change it to the shape you want then letting it cool, forgfot what its call xD and then theres one more..

[JefferyXie]

Excellent Idea.I sometimes get stuck n this is a way i can find out some info

[dragoneyes001]

the latter child became king because the smart twin was a daughter and could not become a king!

[dragoneyes001]

chemistry question: what are two ways to modify a metal? one of them is to heat it change it to the shape you want then letting it cool, forgfot what its call xD and then theres one more..

by acidic corrosion
or oxidisation
as well as electrolosis

[unwaken]

the latter child became king because the smart twin was a daughter and could not become a king!


OMG
I believe you're right!!!!! :doindadom

hahaha I'm impressed! I didn't even think of that! yay!!! I have an answer!

[unwaken]

Alright! I've got one more! heh.. I have about 8 lessons worth of this kind of questions T_T

A family of 4 were going on a mountaineering holiday. The 2nd morning they were all found dead in their cabin. The coroner declared that they had all died from drowning. The faucets in the cabin had not been left on and the boiler and water storage units were undamaged. There was no signs of any foul play. What caused them to drown?

Clues:
1. They were a mile from the nearest lake.
2. It had not rained for 5 days. Not a flash flood.
3. It was not caused by problems with a dam.

My answer was because it was snowing and the snow melted. But I think it's most prob wrong. :sad:

[dragoneyes001]

this ones a stretch but can work within the rules set forth

the cabin was a mile away from a lake but was on an ocean beach there was a high tide and they drowned.problem with snow or ice is they would die of exposure before drowning!

[unwaken]

Hmmm that makes sense but they were on a mountaineering trip that means they were on a mountain no?

[CardboardTubeSamurai]

Pneumonia causes fluid build up in the lungs. And if left unchecked, you might be able to drown. But I doubt it is something that complicated.

[dragoneyes001]

Hmmm that makes sense but they were on a mountaineering trip that means they were on a mountain no?

theres many cliffs near oceans to climb and if cabin was at base of cliff on the ocean beach a tide surge could easily flood the cabin!

[dragoneyes001]

Pneumonia causes fluid build up in the lungs. And if left unchecked, you might be able to drown. But I doubt it is something that complicated.

pneumonia would take longer than one day to drown all four.

[Sorian]

I agree with the above poster

[dragoneyes001]

post several of those questions one at a time is too slow lol

[ChansteR]

Hmmm Ima give you guys a good AP Biology question, what is "Directional Selection" mean?

[WizKid77]

In population genetics, directional selection (sometimes referred to as positive selection) occurs when natural selection favors a single allele and therefore allele frequency continuously shifts in one direction. It is in contradistinction to balancing selection where selection may favor multiple alleles, or background selection which removes deleterious mutations from a population. Directional selection is a particular mode or mechanism of natural selection.

[Tanya]

A family of 4 were going on a mountaineering holiday. The 2nd morning they were all found dead in their cabin. The coroner declared that they had all died from drowning. The faucets in the cabin had not been left on and the boiler and water storage units were undamaged. There was no signs of any foul play. What caused them to drown?
Maybe someone drowned them, and then brought them back to the cabin and dumped their bodies there? Or maybe they drowned themselves on accident then someone found the bodies and put them back in the cabin? lol idk.

[hawkmun]

A family of 4 were going on a mountaineering holiday. The 2nd morning they were all found dead in their cabin. The coroner declared that they had all died from drowning. The faucets in the cabin had not been left on and the boiler and water storage units were undamaged. There was no signs of any foul play. What caused them to drown?
Clues:
1. They were a mile from the nearest lake.
2. It had not rained for 5 days. Not a flash flood.
3. It was not caused by problems with a dam.

Maybe it was food poisoning? If they all ate the same thing and all drowned in their vomit through the night? They don't say they drown in water...

[dragoneyes001]

no they make way to much effort to avoid normal water the most obvious one left is tide.

so the cabin was at base of cliffs on ocean beach tide went up they drowned in the cabin while asleep.

[hawkmun]

no they make way to much effort to avoid normal water the most obvious one left is tide.
so the cabin was at base of cliffs on ocean beach tide went up they drowned in the cabin while asleep.

I don't know. The last one's answer was so simple and obvious. Wouldn't the answer for this one be the same?

[unwaken]

hmm OK it could be possible but I think the food poisioning and pneumonia one is pretty much out. Seems too overcomplicated for an answer.

I have lessons next next week so I'll ask my tutor then. Alright. I'll post another! Actually I already know the answer to this one, I managed to figure it out myself! :biggrinlo but just thought I'll test everybody. :D It's easy once you see the big picture. heh heh

Once a man was walking with his goat and a sack of carrots. Along the way he met a tiger. This was a time where animals were able to speak. The tiger asked the man whether he could tag along. The man had no choice but to allow the tiger to follow him. Soon they came to river. Near the bank there was a small boat which can only carry two things at one time. He had a little problem. He knew that if he took the tiger across, the goat will eat the carrots. Taking the carrots across first would mean that the tiger would make a meal of the goat. How did he reason to himself and managed to get all the 3 things across safely.

[dragoneyes001]

ok first you take the goat across

return

then bring tiger over

return with goat

take carrots over

return

bring goat over again pick up carrots and be on your way

[St1ckBuG]

Comon you people!!!! Where are the physics and calc questions?!?

Relativity....series....anything!!!!! I wanna be helpful :(

[dragoneyes001]

your teacher gives you an altimeter and points to a building just reaching completion of construction and asks you to list four ways to get the buildings height useing the altimeter

A)
B)
C)
D)

[unwaken]

haha good job! u're right! My answer's a little different though, I started with the goat first. But still BINGO! :D heh

[Kefka]

Comon you people!!!! Where are the physics and calc questions?!?
Relativity....series....anything!!!!! I wanna be helpful :(

Yeah, I wouldn't mind any of those type of questions either.

[dragoneyes001]

i gave you a math question name 4 ways to use an altimeter to get a buildings height.

look above for the question.

if no one posts something i'll reveal answers!

[Caity_walsh]

omg it is so hard 2 find info on gowannas ! (i cant spell) i need it 4 ma project ! i fink im gonna fail :(

[dragoneyes001]

try to post the actual word maybe we can help find something!

[Caity_walsh]

its for food tech its on bush foods but i g2g info on the gowana like a recipe wif gowana in it !

[dragoneyes001]

gowana doesnt seem to be an ingredient you sure its spelled like that?

[Caity_walsh]

yes im sure .... its a lizard

[dragoneyes001]

its goanna

[dragoneyes001]

but anyways found something on goanna cooking from australia its a pdf file so heres the link!

Barni (Goanna) Hunting with Albert and Francis Cox Nutrition info ...

www.gme.com.au/television/catch_and_cook_promo.pdf -

[Helikaon]

ahahaha goanna cooking what a laugh, tell you what would be funnier.. if you actually cooked one.. fed it to your class mates :D say its chicken

[Caity_walsh]

the link doesnt work !

[dragoneyes001]

it takes a few to download the pdf file.

wasnt many choices on that particular subject!

[azumi149]

well, i have a case study in theology, 2 term papers, no, 3 term papers, a project, and am incoming finals exams...


i'll marry the one who could help me.. lollerskatez

[dragoneyes001]

well, i have a case study in theology, 2 term papers, no, 3 term papers, a project, and am incoming finals exams...
i'll marry the one who could help me.. lollerskatez

sorry too old for you even if i did help :P

but it sounds like your going to be stuck at the books till the exams end good luck :D

[thief.13]

well, i have a case study in theology, 2 term papers, no, 3 term papers, a project, and am incoming finals exams...
i'll marry the one who could help me.. lollerskatez
i'd be willing to hwelp if you post what you need...(but i wont write your term papers...:LOL:)

[dragoneyes001]

your teacher gives you an altimeter and points to a building just reaching completion of construction and asks you to list four ways to get the buildings height useing the altimeter
A)
B)
C)
D)

OK guess we don't have anyone willing to answer this one here's the answers!

A) the obvious answer climb to top of building and use altimeter
B) measure altimeters size compared to a stair in the building climb building counting how many stairs and multiply the number of stairs by the number of altimeters per stair
C)go to roof of building drop altimeter off the building count how long it takes to hit the ground multiply by 9.8
meters per second per second
D)walk up to the builder of the building and offer him a nice shiny altimeter if he'll tell you how tall the building is!

[unwaken]

hahaha I like option D most. heh! I've got a new question from my lecture notes.

Cheryl has just met a new boyfriend, Floyd. They met in Las Vegas and got married after a whilwind romance. When they loaded th car she looked into a suitcase she had not packed, which has been left in the trunk of th car by her new husband. It contained a body cag with a boys body in it. The suitcase had doles in it so that air could get into it and the body bag was partially open. She did not leave floyd or report the incident to the police. Why?

Hints:
1. He told her that she had found his best friend.
2. THe body bag was used for protection.
3. The boy was 7 yrs old.
4. It was not his son.
5. THe body was fully dressed.
6. Foul play was not suspected even though an arm had been broken.

When I first read the ques I thought dog. hahaha! :D what do you people think?

[dragoneyes001]

he was keeping his childhood friends body while the mosoleum its normaly in is being renovated! floyd is an undertaker!

[unwaken]

OMG! that makes sense!!!! You're a genius! Oh wait. But wouldn't the body rot in the trunk?

Gah!! I wish you were in the same course as me then you could help me all the time! Creative thinking is definitely not my forte.

[dragoneyes001]

the body has been embalmed it wont rot like a body with fluids would!

sorry been in the workforce for over 25 years now courses are long behind me!

[unwaken]

wow.. No wonder you know the answers. *bows in respect* heh I'll come back with more after I do my readings :D

[dragoneyes001]

if you look at those types of questions you'll find they all look for somewhat obvious (hinted at by omission) answers.

[fuoheru]

hahaha I like option D most. heh! I've got a new question from my lecture notes.
Cheryl has just met a new boyfriend, Floyd. They met in Las Vegas and got married after a whilwind romance. When they loaded th car she looked into a suitcase she had not packed, which has been left in the trunk of th car by her new husband. It contained a body cag with a boys body in it. The suitcase had doles in it so that air could get into it and the body bag was partially open. She did not leave floyd or report the incident to the police. Why?
Hints:
1. He told her that she had found his best friend.
2. THe body bag was used for protection.
3. The boy was 7 yrs old.
4. It was not his son.
5. THe body was fully dressed.
6. Foul play was not suspected even though an arm had been broken.
When I first read the ques I thought dog. hahaha! :D what do you people think?

I think he's a ventriloquist, and the body in the bag is his dummy.

[dragoneyes001]

that also works was first thing i thought but I went with real body theme see if it could be explained!

and part of the hints says she doesn't leave Floyd which if its a V. dummy its very likely she would leave a guy who spends inordinate amounts of time talking to a doll! lol

[unwaken]

hmmmm actually both also can. but now i think Floyd being a ventriloquist makes more sense.

Hint 1 says that Floyd told Cheryl she found his best friend. It would be weird if his best friend was a dead embalmed 7 yr old boy. heh :D

[dragoneyes001]

not if the best friend died at 7 yrs old and has been in a mausoleum since which would also explain why it needs renovations which is why he had him in his car temporarily till the workers could finish the work! lol but yes go with ventriloquist its what your teacher is expecting!

[fuoheru]

ah.. I don't think the teacher would get the students to think that far or much lol, considering the questions that were posted previously in this thread. Though... there is always a chance of that being the answer.

[dragoneyes001]

actualy teachers are quite unhappy if they get a real free thinker lol.

if you can stand up and out debate them on subjects they will become rather irate with you!

[fuoheru]

Okay um I haven't done labs in a long time so could somebody tell me what the difference is or what you do for data analysis and data collection?

A sketch of the experiment would go under which one?And same with a table, which one would that go under?
- very confused atm

[Kefka]

data collection would be all the various results and trials that you did during the experiment. All the numbers that play a part in the final result, but aren't the main ones.

data analysis is what you find out from the end result. You analyze the final numbers and come out with a conclusion. This is a later step then data collection.

As for the sketch and table, what do they contain really?

(( EDIT: Finally, a nice science question for me. :D ))

[fuoheru]

um.. I forgot to mention this was for IB, so it might be different. The sketch is basically a sketch of color change in the experiment, the table is just like a Before and After thing.
Hope you can still help me out here bastaldo

[Kefka]

Does it change more than one color during the entire experiment? or is it just red==>blue

[fuoheru]

there's two tests, both of them go from normal > diff color and thats the end of the experiment.

[Kefka]

I would say the sketch goes in data collection and the table in the analysis.

[Shinigami_Josh]

hey any one noe much about john daltons atomic theroy?? pluss it gives me the chance to have another pointless bit for my bibliography as we need some or we get marked down

[St1ckBuG]

hey any one noe much about john daltons atomic theroy?? pluss it gives me the chance to have another pointless bit for my bibliography as we need some or we get marked down

http://en.wikipedia.org/wiki/John_Dalton

Scroll down a bit.

Would you like some fries with that?

[Shinigami_Josh]

no thank you but thank you, just found out i have to do heaps more the teachers slipped it in at the end devious peoples

ok any one know were i can get pictures of these scientists signitures?
John Dalton
Ernest Rutherford (found coat of arms on wiki)
Niels Bohr
James chadwick

and how would you write a letter to a family member (english used at the time)

john dalton 1887
JJ thomson 1897
Ernest rutherford 1911
niels bohr 1924
james chadwick 1932

Thanks shinomori (btw how do you reference someone who helped you get stuff?? (i mean how you found it and told me)) sorry if it makes no sence

[Shinomori]

http://www.phy.ohiou.edu/~drabold/history/bohr.jpg

Bohr's is at the bottom.

I'll edit this for the others.

Johnny Dalton.

http://www.historyforsale.com/html/prodetails.asp?documentid=38811&start=1&page=153

[The_Supervisor]

Uhm, don't expect anyone to be able to help me with this one, but we're supposed to do a little project for our c programming class.
We gotta write a program in c that has to be able to work with a mp3 player (copying files, deleting, just viewing them)

We're kinda stuck at the moment so any help will be appreciated

thx :winking56

[maximoose666]

Erm... little update... apparently the thread got duplicated. Use THIS VERSION, not the other one.

Sorry I can't help with the C programming...

[Shinigami_Josh]

hahaha thanks for the help with the last one this one has to do with componding gravity or something like that with the gravity being a fraction of acceleration due to gravity directly proportional to the angle of desent

[Micro_Shorty]

erm.. i think acceleration due to gravity is constant no matter what your angle of decent is, as all forces can be split to the x,y,z vectors, and they are all independent of each other. so angle of decent is not supposed to affect the acceleration due to gravity.

[dragoneyes001]

unless your talking a moving body that enters gravity at differing angles will have various levels of acceleration or deceleration if the angle to the gravitational pull is extreme enough. but gravity is constant when measured at the same distance from the body the greater the distance away from the body the smaller the gravitational force will be so a sharp angle will make a body reach maximum gravitational pull earlier than a shalow angle to the body would.

ooops just looked outside its snowing sorry but will need to get going earlier because of it you'd need to know if the body that your calculating the speed of trajectory for is within a constant gravitational pull or if its only entering it from a distance these will give different results!

[Byakuya7]

Uhm, don't expect anyone to be able to help me with this one, but we're supposed to do a little project for our c programming class.
We gotta write a program in c that has to be able to work with a mp3 player (copying files, deleting, just viewing them)
We're kinda stuck at the moment so any help will be appreciated
thx :winking56

What are you programming in? If it's in Jcreator then I could help you out, but I'll look into it and see what I can do. Dont expect too much since I know Java, not C++.

[Shinigami_Josh]

the thing with the gravity was a dart is pusshed up a slope then comes back down

[dragoneyes001]

arc calculations?
so you need the calculation of how gravity stops the upward motion and then affects the downward portion of the arc?

[Shinigami_Josh]

i dont think thats it i think its like the balistic equations but its on a ramp but because of that it is only a fraction of gravity that slows it down
................../
................/
.......[___] /
< ramp moves down this way
V gravity goes this way
so yeah its something like that with the gravity and stuff

[dragoneyes001]

gravity will be constant. ballistics equasions are based on arcs of drop over distances.

with a ramp the force of gravity and friction plus weight of object are needed to calculate the force needed to move up the ramp.

[Hits]

there's two tests, both of them go from normal > diff color and thats the end of the experiment.
I would actually put them both in data analysis since you are comparing the differences and stating that the change was a chemical reaction.

HELP NEEDED
I have to write a description for a chemical base, acid or salt of my choice, including the molecular formula, the valences of the individual elements(and radicals), its molecular mass at room temperature, it's molecular geometry, melting/boiling points and catalysts if it applies. Extra marks will be given description is of synthesis is given. The compound has to have a polyatomic ion in its formula. This project is just so random since we haven't even touched on synthesis, catalysts and my class has barely touched on the idea of polyatomic ions.

I chose...
Methyl acetate - C3H6O2

That's all I got...and I got the formula from wikipedia.org. God bless wikipedia.org. Anyone feeling like helping me?

[dragoneyes001]

heres a starter link with a bit of info

http://www.chemicalland21.com/arokorhi/industrialchem/solalc/METHYL%20ACETATE.htm

heres a link to more places for that info

http://scholar.google.com/scholar?q=synthesis%20for%20Methyl%20acetate&hl=en&lr=&oi=scholart

[Hits]

heres a starter link with a bit of info

http://www.chemicalland21.com/arokorhi/industrialchem/solalc/METHYL%20ACETATE.htm

heres a link to more places for that info

http://scholar.google.com/scholar?q=synthesis%20for%20Methyl%20acetate&hl=en&lr=&oi=scholart
oh my god, thanks! now I just feel like pasting the whole thing...:face82:
so the acetate is the polyatomic ion...its molecular formula looks weird to me for some reason. oh why oh why did i choose such a hard one to do? :(

[The_Supervisor]

What are you programming in? If it's in Jcreator then I could help you out, but I'll look into it and see what I can do. Dont expect too much since I know Java, not C++
Actually it's in C and we're doing it in Borland. So I guess I'd be sort of hard for you to help. But thnx anyway, I'll figure something out in the end

[unwaken]

wow been a long time since i was here. for the people who helped in my questions: big thank you! my tutor was super impressed. HAHA! :p of course i had to tell him i had help.. hehe

anyway majority of the answers were right with the exception of the mountain one.

Alright! I've got one more! heh.. I have about 8 lessons worth of this kind of questions T_T
A family of 4 were going on a mountaineering holiday. The 2nd morning they were all found dead in their cabin. The coroner declared that they had all died from drowning. The faucets in the cabin had not been left on and the boiler and water storage units were undamaged. There was no signs of any foul play. What caused them to drown?
Clues:
1. They were a mile from the nearest lake.
2. It had not rained for 5 days. Not a flash flood.
3. It was not caused by problems with a dam.
My answer was because it was snowing and the snow melted. But I think it's most prob wrong. :sad:

he said we were thinking too much :eek13: actually think beyond the picture was his precise words. lol

[dragoneyes001]

wow been a long time since i was here. for the people who helped in my questions: big thank you! my tutor was super impressed. HAHA! :p of course i had to tell him i had help.. hehe
anyway majority of the answers were right with the exception of the mountain one.
he said we were thinking too much :eek13: actually think beyond the picture was his precise words. lol

what answer did he say was wrong?

[unwaken]

food poisioning + leukimia (im pretty certain i spelt this wrongly) + tide is out

this ques is a tough one. gah! :p:

[fuoheru]

Was that the answer?
"food poisioning + leukimia (im pretty certain i spelt this wrongly) + tide is out"

[unwaken]

urm actually i meant the answers:

food poisioning + leukimia (im pretty certain i spelt this wrongly) + tide

are wrong.

lol

[Hits]

Is momentum always constant? I forgot. I think it's velocity since if a change velocity happens, that must mean there was a change in variable.

momentum=p
mass=m
velocity=v

p=mv

[dragoneyes001]

heres another possibility to the cabin question:

they started a fire in the fireplace then all hop'd into the hot tub but the chimney was soot covered and the place started to fill with carbon monoxide they all passed out in the hot tub and drowned!

[thief.13]

Is momentum always constant? I forgot. I think it's velocity since if a change velocity happens, that must mean there was a change in variable.
momentum=p
mass=m
velocity=v
p=mv

momentum changes when the velocity changes.
since p = mv, and m is consrtant then you can say that p is dependent on v and is directly proportional to it. :)
but one thing though: momentum is conserved in a system.

[Nichigo]

Ok I have a problem for my Electronic Materials and Devices class.

Coupound III-V Semiconductors - Indium as an element is a metal. IT has a valency of III. Sb as an element is a metal and has a valency of V. InSb is a semiconductor, with each atom bonding to four neighbors, just like silicon. Explain how this is possible and why InSb is a semiconductor and not a metal alloy. (Consider the electronic structure and sp^3 hybridization for each atom.)

:confused: :confused: :confused:

[Kaori-chan]

heres another possibility to the cabin question:
they started a fire in the fireplace then all hop'd into the hot tub but the chimney was soot covered and the place started to fill with carbon monoxide they all passed out in the hot tub and drowned!

I like that theory, actually... though I'll just shorten my guess to say that they drowned in a hot tub/pool or something. Hmmmm.

[dragoneyes001]

sorry just found your answer for the cabin its not theory its altitude sickness
which if they did NOT aclimatize while climbing from low altitude to high altitude one issue that occurs is fluid build up in the lungs and can be fatal!
in effect they drowned by not taking time to aclimatize to the altitude!
(kept woundering why they were mountaineering so looked up altitude sickness)

[jovine]

any1 expert with IIR filters and VHDL programming?

[Nichigo]

any1 expert with IIR filters and VHDL programming?

I might be able to help you with VHDL. What's your question?

[Hits]

1.The legs of a right triangle have lengths 12 and 16. Obtain the length of the median to the hypotenuse.

2.Find the measures of the sides and angles of a rhombus whose diagonals measure 24 inches and 16 inches.

[kombat]

Does anyone know all the presidents

[Hits]

Do a google search....
http://en.wikipedia.org/wiki/American_presidents

[death]

i need help on my math homework

[WizKid77]

i need help on my math homework
Ok, well what do you need help with on it?

[magesha]

Great thread..wonder y i nvr saw this one.. ill try to help out. like the logic questions.
@DE: thats the question that bohr fought with his professor, isnt it? (altimeter one)
C)go to roof of building drop altimeter off the building count how long it takes to hit the ground multiply by 9.8 meters per second per second - however, here you need to square the time before multiplying by acceleration(which is g in this case, or units wont match up, among other things)
Coupound III-V Semiconductors - Indium as an element is a metal. IT has a valency of III. Sb as an element is a metal and has a valency of V. InSb is a semiconductor, with each atom bonding to four neighbors, just like silicon. Explain how this is possible and why InSb is a semiconductor and not a metal alloy. (Consider the electronic structure and sp^3 hybridization for each atom.)
@Nichigosan: hmm, in III-V semiconductors, the valence band electrons are shared between the two atoms, and they attain a half-filled valnece band stage, which is more stable than a sp3 band with 3 or 5 electrons. While Indium and antimony need to act as metals in order to attain a stable electronic configuration (empty 2nd shell(or maybe 3rd, need to look up the periodic table), these atoms in a lattice arrangement have half-filled sp3 orbitals (each sp3 hybrid orbit has one electron each) and hence InSb acts as a semiconductor. I am sure it can be explained better, but hope that helps.

[magesha]

Sorry for dbl post, but this got too long a\to contain in 1 post
1.The legs of a right triangle have lengths 12 and 16. Obtain the length of the median to the hypotenuse.
2.Find the measures of the sides and angles of a rhombus whose diagonals measure 24 inches and 16 inches.

by the median, A line segment drawn from one vertex to the midpoint of the opposite side: first, length of hypotenuse = root(12^2+16^2)=20. bah, anyways, lets the call the sides of the triangle a, b and c and the corresponding angle at opposite vertex A, B and C. a= 12, b=16, c=20.
link for the theorems i used: http://www.cut-the-knot.org/triangle/medians.shtml, say the median meets side c at Ma.
if u can use vector algebra, its easy: the median is the average of the side vectors M(vector)=(A(vector)+B(vector))/2. (to prove that realize that the third side is +/-(B-A) dep on ur direction of travel, and then u add half of this to the other vector to get median, ie, M= A+ 1/2(B-A)= 1/2*(A+B) ) therefore, M=(16 x^ + 12 y^)/2, where x^ and y^ denote unit verctors along x and y dire resply. or m = root(8^2+6^2)=10. if not, we need use the angles and stuff, i will try to come up with some prood for that later, if this is not enough.

As for rhombus, realize its four right anlged triangles with their right angled vertices stuck together, and each of the sides of these triangles are half the length of the corresponding diagonals. therefore the side is the hypotenuse, side s = root ((16/2)^2+(24/2)^2) = root(64+144) = 14.42. hmm angles, its double the angle of the right triangles. lets call the angles of the triangle A and B. tan A=8/12=2/3. tan B=3/2. A=33.7 deg, B = 56.3 deg. therefore angles of rhombus are 67.4 deg and 112.6 deg.

EDIT: as for the gravity ramp question, you need to look into what is known as free body diagram. The forces acting on the cart are its weight (due to gravity), the normal reaction from the ramp (which will be normal to the ramp surface) and the frictional force acting on the cart, which will be parallel to the ramp. I would do you good to resolve your forces parallel and perpendicular to the ramp. If you take the ramp as the frame of reference for the cart, the force perpendicular to the surface has to be zero, since the cart cannot dig into the ramp. and the perpendicular force will be responsible for motion along the ramp. if the ramp is stationary, you dont have to worry about the forces acting on it. if its a pice sitting on the flat force, then it gets a little more complicated as you need to consider the forces acting on the ramp, from the cart as well as the floor, and draw the free body diagram for the ramp... well i can help u in more detail, if you can explain the problem in more detail

Methyl acetate: acetic acid is a cabolic acid, that has methane as its organic origin, so it is CH3- C(=O)-OH. the hydrogens ions attached to the carbon are not acidic in nature but the hydrogen attached to the oxygen is, since oxygen is more electro-positive than carbon. hence, the removal of this hhydrogen results in the acetate ion: (CH3- C(=O)-O)-, this is the anion and a methyl ion (CH3+) is the cation in the organic salt methyl acetate. i am sure you found better resources, but i cant keep mum on a subject i know :P

[dragoneyes001]

ya I'm used to calculating drop in feet per second sq. but you have to allow for the acceleration to nominal speed at which point it becomes a constant.

ya its an old question eons old.

heres a quicky brain teaser:

the person who makes it doesnt want to use it.

the person purchasing it doesnt want to use it.

the person using it doesnt know they are useing it.

what is it?

[kenshinsan]

Calc is a *****, so is Physics.

heres a quicky brain teaser:
the person who makes it doesnt want to use it.
the person purchasing it doesnt want to use it.
the person using it doesnt know they are useing it.
what is it?

Whats the answer

[dragoneyes001]

Calc is a *****, so is Physics.
heres a quicky brain teaser:
the person who makes it doesnt want to use it.
the person purchasing it doesnt want to use it.
the person using it doesnt know they are useing it.
what is it?
Whats the answer

that would be no fun if i post the answer right away lets see if anyone guesses/or knows it first.

[unwaken]

for some weird reason. toilet paper keeps popping into my mind but im pretty sure its wrong.

hmm i have absolutely no idea.

gimme a hint! :p

[Dyingday]

Lol a coffin?

[Shinji]

I think a coffin.

[unwaken]

I think a coffin.



hmmmm...

i think the both of you might actually be right.

coffin fits!

[Hits]

Sorry for dbl post, but this got too long a\to contain in 1 post
by the median, A line segment drawn from one vertex to the midpoint of the opposite side: first, length of hypotenuse = root(12^2+16^2)=20. bah, anyways, lets the call the sides of the triangle a, b and c and the corresponding angle at opposite vertex A, B and C. a= 12, b=16, c=20.
link for the theorems i used: http://www.cut-the-knot.org/triangle/medians.shtml, say the median meets side c at Ma.
if u can use vector algebra, its easy: the median is the average of the side vectors M(vector)=(A(vector)+B(vector))/2. (to prove that realize that the third side is +/-(B-A) dep on ur direction of travel, and then u add half of this to the other vector to get median, ie, M= A+ 1/2(B-A)= 1/2*(A+B) ) therefore, M=(16 x^ + 12 y^)/2, where x^ and y^ denote unit verctors along x and y dire resply. or m = root(8^2+6^2)=10. if not, we need use the angles and stuff, i will try to come up with some prood for that later, if this is not enough.
As for rhombus, realize its four right anlged triangles with their right angled vertices stuck together, and each of the sides of these triangles are half the length of the corresponding diagonals. therefore the side is the hypotenuse, side s = root ((16/2)^2+(24/2)^2) = root(64+144) = 14.42. hmm angles, its double the angle of the right triangles. lets call the angles of the triangle A and B. tan A=8/12=2/3. tan B=3/2. A=33.7 deg, B = 56.3 deg. therefore angles of rhombus are 67.4 deg and 112.6 deg.
EDIT: as for the gravity ramp question, you need to look into what is known as free body diagram. The forces acting on the cart are its weight (due to gravity), the normal reaction from the ramp (which will be normal to the ramp surface) and the frictional force acting on the cart, which will be parallel to the ramp. I would do you good to resolve your forces parallel and perpendicular to the ramp. If you take the ramp as the frame of reference for the cart, the force perpendicular to the surface has to be zero, since the cart cannot dig into the ramp. and the perpendicular force will be responsible for motion along the ramp. if the ramp is stationary, you dont have to worry about the forces acting on it. if its a pice sitting on the flat force, then it gets a little more complicated as you need to consider the forces acting on the ramp, from the cart as well as the floor, and draw the free body diagram for the ramp... well i can help u in more detail, if you can explain the problem in more detail
Methyl acetate: acetic acid is a cabolic acid, that has methane as its organic origin, so it is CH3- C(=O)-OH. the hydrogens ions attached to the carbon are not acidic in nature but the hydrogen attached to the oxygen is, since oxygen is more electro-positive than carbon. hence, the removal of this hhydrogen results in the acetate ion: (CH3- C(=O)-O)-, this is the anion and a methyl ion (CH3+) is the cation in the organic salt methyl acetate. i am sure you found better resources, but i cant keep mum on a subject i know :P
Wow, thanks. I figured out the right triangle question but not the rhombus one.

[dragoneyes001]

hmmmm...
i think the both of you might actually be right.
coffin fits!

to those who thought/guessed coffin your right!

[Nichigo]

VHDL question here:

I have a project where I'm programming a 4-bit shift register to do a handful of funtions like serial-in-serial-out(SISO), parallel-in-parallel-out(PIPO), rotate shift, normal counters, and programmable counters. Right now I'm having trouble coding a normal up or down counter (two separate counters, not a combined up/down counter). My problem lies within the use of recursive signals. Basically:

*1 bit is added to the present signal to increment it on the rising edge of the clock cycle.

*Then that signal is fedback to the input to be incremented again on the next cycle.

Here's an example of what I try to do:

sig2 <= sig1 + '1';
output <= sig2;
sig1 <= sig2;

However, when I do this, I end up getting a standard logic value of forcing unknown for sig2. Is there a better way to handle the recursive signal?

[jovine]

sorry nichigosan :) thx for offering help previous page but i was in a mad rush for deadline and didn't had time to chk. Regarding ur que above i was thinking y not use a buffer.

[Nichigo]

sorry nichigosan :) thx for offering help previous page but i was in a mad rush for deadline and didn't had time to chk. Regarding ur que above i was thinking y not use a buffer.

np ^_^

...How do i infer a buffer? (sry if question seems so simple...i just started VHDL 2 months ago >.<)

[Machiavelli]

How will I end up my drinking [of alcoholic beverages] if the reason that I am drinking is that am I ashamed of my drinking?

Help me here, if you can.

[jovine]

Hi Nichigosan! Sorry for the 2-days late reply! The creating of a buffer to hold values is on this site, many more examples are shown too. Hope u find it useful! http://instruct1.cit.cornell.edu/courses/ee475/tutorial/VHDLTut.htm
By the way I'll be busy with exams preparation, exams starting on 18th so pardon me if I fail to reply! (Won't be visiting the forum too often) ^^

Hey Machiavelli find smt more addictive but healthier than alcoholism to do, it may help.

[Machiavelli]

It is of no help... *blurp* I am drinking because I am ashame of myself drinking!

[dragoneyes001]

It is of no help... *blurp* I am drinking because I am ashame of myself drinking!

at one point your liver will either give out and you'll be forced to stop or your drinking will create an even more shameful situation and that will over ride your willingness to keep drinking which is the crux of why your drinking at all the being ashamed of it is meaningless if you willingly drink knowing to yourself its shameful then your purposely ignoring your feeling of shame of the drinking so it means your not really ashamed of your behaviour.

[unwaken]

urm.

just a random question. are u drinking in public? or are u drinking at home alone?

[Machiavelli]

I cannot think clearly... I'm so exhausted; I feel like dying. I am drinking in any places...

[Naeko]

Did you already try to speak with a doctor about it?Doctors can give you some kind of pills...not too useful,but maybe...

[Machiavelli]

NO. They are of no use. They would just scold me.

[unwaken]

urm..

maybe u shud smash ur beer bottles or hide them and lock urself in the room so you won't drink.

anyway what's so shameful about drinking? just drink in moderation. nobody looks down on people who drink in moderation... there's nothing wrong with drinking anyway.

*edit*
urm btw. i think you posted ur problem in the wrong thread. this is for homework help. :p

[M-50]

Does anyone know anything about:
'Whether The World Trade Organisation should intervene with policies for ethical responsibility?' :headbang:

[Hotaru]

Can anyone help me with this???

"Determine the Formula of Hydrated Sodium Carbonate, Na2CO3.xH2O, using a titration method"

PLS. HELP!!! PM PLS!!!

[dragoneyes001]

Can anyone help me with this???

"Determine the Formula of Hydrated Sodium Carbonate, Na2CO3.xH2O, using a titration method"

PLS. HELP!!! PM PLS!!!

this may be what you were looking for:


http://physics.slss.ie/downloads/ch_me_4.4student.doc


Does anyone know anything about:
'Whether The World Trade Organisation should intervene with policies for ethical responsibility?'

this is a opinion question it'd be hard to answer it in a way that it'd sound like your reasoning to your teacher.

[FallenAngels]

Does anyone know how to solve quadratic formulas? Theyre really getting on my nerves and it doesn't help to have a teacher who starts teaching with 10 minutes left in the class?

[The_Supervisor]

u mean the (a+b)² = (a² + 2ab + b²) stuff??

[Hotaru]

this may be what you were looking for:


http://physics.slss.ie/downloads/ch_me_4.4student.doc




this is a opinion question it'd be hard to answer it in a way that it'd sound like your reasoning to your teacher.
Thanks dude!!! I found that out as soon as i posted!!! anyway...
Quadratic formula, i can help... but give me the questions...

[pylar]

x = [ -b ± sqrt(b^2 - 4ac) ] / 2a ? That quadratic equation?

[strydr]

u mean the (a+b)² = (a² + 2ab + b²) stuff??

how do you do that "2 sign" - cause that would help

[strydr]

I wanted to know if anyone would write an essay for me, if i were to give a topic, cause i know that sounds like a lotta crap, but just wanted to know...

[Draffut]

Write a full essay? is there any reason you cant write it yourself, or you just trying bum it off on someone else?

[Kefka]

We could help you writing it, but actually write it for you? That's more than just help. :P

But I can help you with how to write it.

[strydr]

Thats perfect! but i gotta get a topic first... i mean i knew i was asking THE stupid question, but thanx ...
sTrYdR

[Kefka]

You don't have a topic yet?

[strydr]

no, just thinkin about it...

[maximoose666]

1. Don't Spam.

2. Don't Double Post.

3. This is a homework help thread, not an essay request thread.

4. x = [ -b ± sqrt(b^2 - 4ac) ] / 2a ?

This is indeed the quadratic formula; where a is the X Squared term, b is the X term and c is the integer term in a quadratic equation.

5. If you want help with writing the essay as opposed to having it written for you, then I would be happy to give it :)

[strydr]

1. Don't Spam.
2. Don't Double Post.
3. This is a homework help thread, not an essay request thread.
4.
This is indeed the quadratic formula; where a is the X Squared term, b is the X term and c is the integer term in a quadratic equation.
5. If you want help with writing the essay as opposed to having it written for you, then I would be happy to give it :)
sorry man, i know i was kinda Spammin, but i didnt mean to, its just that i had to tell the guy that i was happy with what he said, and that i was kinda stupid to ask a question with that kinda meaning... you may even think that this is a spam at this moment in time... but i just wanna apologize.
Physics...
i wanted to know, that in my exams i gotta derive Formula from other formulae, is there an base formula in ELECTROSTATICS, that could possibly be the eye opener for me...
In the ax^2 + bx + c = y
c is also known as the Constant, since it remains and will forever be constant throughout the changing of x --- the graph of this quadratic equation is basically a U shape...
what grade or level of maths is this?? for who exactly??
http://www.rokettobaibii.net/chacha/mp3sforcontest/4th/66427.mp3

[blackmary]

need help regarding an html tag, or should i say bbcode
how do you make a URL appear as a word or an image? the <a href= thingi is for html right? so how do you make it on bbcode?

[s3r3n1ty]

Does this help?

http://en.wikipedia.org/wiki/Bbcode :)

[grimm_fans]

i need help on science

1 compare the formation of seamounts and volcanos

2 draw a cross section of the ocean floor illustrating and labelling 6 magor features. rite a description of each feature

3.explain the relation between river valleys and sea canyons

4.should water resources be managed by individual communities or on a watershedbasis, where all communities within a watershed make decisions as a group about how water is used? explain

7 what would happen to our water supply if land use was not regulated

plz answer all of them at once plz

[s3r3n1ty]

1. Do you mean any volcanoes or just submarine volcanoes?

2. What sort of features?

3 River valleys are formed by the downward erosion of a river. Thus over time a valley will be carved by the river. Sea Canyons may have been carved during a time when sea level was lower than present and rivers were able to flow out to the edge of the shelf. This theory is supported by the fact that many (but not all) canyons are found offshore from major rivers. A difficulty with this theory is that the sea level would have had to have been 3000m lower to account for the canyons.

4. I think this question just requires your own opinion. With an explantion of course.

5. Too crowded== water shortage
Too sparse=too much excess water not used. (Not too sure bout this)

[grimm_fans]

1. Do you mean any volcanoes or just submarine volcanoes?
2. What sort of features?
3 River valleys are formed by the downward erosion of a river. Thus over time a valley will be carved by the river. Sea Canyons may have been carved during a time when sea level was lower than present and rivers were able to flow out to the edge of the shelf. This theory is supported by the fact that many (but not all) canyons are found offshore from major rivers. A difficulty with this theory is that the sea level would have had to have been 3000m lower to account for the canyons.
4. I think this question just requires your own opinion. With an explantion of course.
5. Too crowded== water shortage
Too sparse=too much excess water not used. (Not too sure bout this)

1. yeah
2. don't know
4. can you write one for me i don't get it

anyways i need more help

http://yennadon.sd42.ca/online/langarts/giver/6-10.html
these are the questions

[dragoneyes001]

1. yeah
2. don't know
4. can you write one for me i don't get it

i'll give you a hand on this but its not "we do your homework for you thread"

i'll edit in some info in a few.

http://oceanworld.tamu.edu/resources/ocng_textbook/chapter03/chapter03_03.htm

this next one will give you a real example of water resource management.

http://www.ci.boulder.co.us/publicworks/depts/utilities/projects/barker-res/pdf/ExecSummary.pdf

question five or 7 as you posted it is a study of how unrestricted land development will affect water supply like how it will pollute the sources fill in tributaries reducing total flow ....etc... this is where you need to think of how can mass building be a negative impact on water supply.

heres a link on size and age of seamounts by remote sensing:

http://www.soest.hawaii.edu/pwessel/papers/1997/Science/Science.pdf

something on volcanoes:

http://www.britannica.com/eb/article-24463?hook=388864

[s3r3n1ty]

1. Heres a long shot. I think its that volcanoes have pipes(leading to the mantle), which the lava is projected up. Seamounts dont have pipes and thus dont erupt(spew lava). (Could be wrong but ill check)

2.Ideas are mid-ocaenic ridges, deep sea trenches and the sort.

4. Latter, as the water supply for all the comminties within the drainage basin share the same water source.

edit: dont know that book-suck at language anyway

[grimm_fans]

dragoneyes can u help me with that book

thanks guys

[blackmary]

Does this help?
http://en.wikipedia.org/wiki/Bbcode :)
thank you very much!!!
now join us! click me!!! (http://forums.bleachportal.net/showthread.php?t=11959)

[brolijc]

hmmmm i'm not exactly sure if this can be counted as homework but its my project. the theme of this project is "Learning Aids". which requires me to design and make an artefact which would aid in the learning of others, for example an artefact which makes memorising the periodic table easier and more interesting. i seriously need some ideas on what to make.

[s3r3n1ty]

By atrefact do mean a physical thing you have to build or is it just like a study method?

[brolijc]

a physical thing which i have to build

[s3r3n1ty]

Thats pretty difficult lol!

edit: Can it be on anything?

Ill try to brainstorm on ideas

[brolijc]

Thats pretty difficult lol!
edit: Can it be on anything?
Ill try to brainstorm on ideas

yup anything as long as it aids in learning

[s3r3n1ty]

Can you make something like a colour coded chart ot somehting like that.

Im having trouble thinking of ideas.

[brolijc]

colour coded chart? if possible please explain more on it

[s3r3n1ty]

I was just thinking of the periodic table tho. Its been done often.

Diffent colours represent differnt things. Any element can have many coulors (By making squares within squares).

Example: green for radioactive
grey for man made
yellow for non metal
blue for alkili metal ect.

Also you could make symbols that tell more about it

Example: 'symbol' for solid,liquid or gas at RT
boiling and melting points


Of course along with ordanairy periodic table info.

Study aid for the elements in general

[brolijc]

hmmmm good idea but someone in my class already is making periodic table, gonna have to ask the teacher about it first

[Hits]

Simple physics question.

Annie and Winny are playing tug-of-war. Anie wins, pulling Winny into the mud puddle. Why did Arnie win?


a) Annie exerted a greeater force on the rope than Winny exerted on the rope.
b) The rope exerted a greater force on Winny than it exerted on Arnie.
c) Arnie exerted a greater force on the ground than Wnny exerted on the ground.
d) All of the above.

I know it can't be b or d because it just doesn't make sense. In order for the rope to exert an effective force to Wimpy, it needs to have a signficant amount of mass which it obviously doesn't have.

So now I am stuck between a and c. Anyone care to help me out?

another question of the same sorts...this one doesn't really make too much sense to me. I think my teacher mixed up the units or missing something.

Annie and Winny are on two opposite sides of a see-saw. The see-saw platform is 3 meters long. The fulcrum is located .4m closer to Winny than to Annie. Winny has a push of 450N against the seesaw and is on the ground. Annie, being the lighter person has been lifted up into the air at an angle for derpression of 45 degrees. What is the minimal weight I can add to Winny's side for her to equal the ammount of force Annie is exerting onto the seesaw so they can both be in air? What is the minimal weight I can add to Winny for her to at the bottom and life Annie up at 45 degrees?

[s3r3n1ty]

First one i think a.

<------------------------- Annie
--------------------> Winny

Annie exerts a greater force on rope than Winnt so force res. will be in the direction of Annie.

[strydr]

I have to write an essay of about 400 - 500 words on Hamlet: Discuss what the play has to say about political power and the use and abuse of such power.

Did anyone do Hamlet, cause i suck at it, and would just like to have some guide lines on it??

[Hits]

First one i think a.
<------------------------- Annie
--------------------> Winny
Annie exerts a greater force on rope than Winnt so force res. will be in the direction of Annie.
Ok, i think it's c since a is too broad of an answer. For one to win tug-o-war, they must provide not force on the rope but a significant ammount of acceleration from rest to initiate motion.

[Kefka]

For the physics question..

It's a.

The force exerted on the ground is in a vertical direction, so it has no bearing to them falling down. However, if Annie pulls with a greater force, it will cause the rope( or rope center of mass) to move to the left, which will bring Winnie along with it.

:D

Why can't I get physics questions like these on my tests?

[Hits]

For the physics question..
It's a.
The force exerted on the ground is in a vertical direction, so it has no bearing to them falling down. However, if Annie pulls with a greater force, it will cause the rope( or rope center of mass) to move to the left, which will bring Winnie along with it.
:D
Why can't I get physics questions like these on my tests?
Care to answer question 2? :D

[blueice760]

Simple physics question.
Annie and Winny are playing tug-of-war. Anie wins, pulling Winny into the mud puddle. Why did Arnie win?
a) Annie exerted a greeater force on the rope than Winny exerted on the rope.
b) The rope exerted a greater force on Winny than it exerted on Arnie.
c) Arnie exerted a greater force on the ground than Wnny exerted on the ground.
d) All of the above.
I know it can't be b or d because it just doesn't make sense. In order for the rope to exert an effective force to Wimpy, it needs to have a signficant amount of mass which it obviously doesn't have.
So now I am stuck between a and c. Anyone care to help me out?
another question of the same sorts...this one doesn't really make too much sense to me. I think my teacher mixed up the units or missing something.
Annie and Winny are on two opposite sides of a see-saw. The see-saw platform is 3 meters long. The fulcrum is located .4m closer to Winny than to Annie. Winny has a push of 450N against the seesaw and is on the ground. Annie, being the lighter person has been lifted up into the air at an angle for derpression of 45 degrees. What is the minimal weight I can add to Winny's side for her to equal the ammount of force Annie is exerting onto the seesaw so they can both be in air? What is the minimal weight I can add to Winny for her to at the bottom and life Annie up at 45 degrees?


Dude the answer for the first question is c) as Newtons III Law applies to the horizontal component of the force they apply on the ground.

as for the second one
the min weight annie must have is 260.52N to lift Winny into the air and balance the see-saw, as for the other part i dont get what you are saying, if Winny was on the floor initially then the infered height of the see-saw above the ground is 0.77m thus Annie cannot lift Winny to an angle of 45' since the see-saw would hit the ground and would not be able to go any further! this is because Annie is on the longer side of the see-saw.
hope this helps

bye

[Kefka]

there is no horizontal force applied to the ground. unless they are standing at some weird angle and applying the force in some weird way. Also, that would have nothing to do with the rope which must be pulled on to drag Winny.

Oh, and im working on #2..got my own problems to do too lol

[Hits]

Dude the answer for the first question is c) as Newtons III Law applies to the horizontal component of the force they apply on the ground.
as for the second one
the min weight annie must have is 260.52N to lift Winny into the air and balance the see-saw, as for the other part i dont get what you are saying, if Winny was on the floor initially then the infered height of the see-saw above the ground is 0.77m thus Annie cannot lift Winny to an angle of 45' since the see-saw would hit the ground and would not be able to go any further! this is because Annie is on the longer side of the see-saw.
hope this helps
bye
Yes, I get it now! It's quite simple actually.

[blueice760]

there is no horizontal force applied to the ground. unless they are standing at some weird angle and applying the force in some weird way. Also, that would have nothing to do with the rope which must be pulled on to drag Winny.
Oh, and im working on #2..got my own problems to do too lol


Tell me Bastaldo, when you play a game of Tug-of-war do you stand like a dead tree and use only your hands to pull on the rope?
What you are implying is theoretically impossible, to stand vertically and tug on a rope without being tugged forward, this violates newtons third law of motion which is a not possible in classical mechanics, you would fall forward YOU CANNOT WIN A GAME OF TUG-OF-WAR without applying the horizontal component of force generated by you standing at a wierd angle TO PULL!!!!

[Kefka]

Ok then tell me...whats the point of the rope? Since choice c doesn't say anything about the rope..if annie exerts a force on the ground greater then Winny, winny should fall, but nowhere does it mention the rope. Aren't you pulling on the rope..therefore exerting a force on the rope to pull it? which happens to be choice a.

[Hits]

Ok then tell me...whats the point of the rope? Since choice c doesn't say anything about the rope..if annie exerts a force on the ground greater then Winny, winny should fall, but nowhere does it mention the rope. Aren't you pulling on the rope..therefore exerting a force on the rope to pull it? which happens to be choice a.
The third law says that for every force sideA exerts to its opposite, there is an equal amount of force but oppositely dirrected at side A. And the force exerted from to the ground is friction therefore it's not vertical. Side A receives from Side B needs to be cancelled by the friction force side A exerts to the ground or side A will accelerate towards side B and therefore, losing. To win, not only does the person has to exert a force equal to that of the force he receives from his opposite side, he must exert more friction force then his opponent's. Annie won because she exerted more friction force onto the ground then Winny did.
If I chose A as the answer, then it wouldn't make since as there is only one force acting and no sides will gain acceleration because of newton's 3rd law.

And oops, I think I made a mistake with the last part of the question. Scratch the 45 degrees part, I got it confused with another question.

[Kefka]

The third law says that for every force sideA exerts to its opposite, there is an equal amount of force but oppositely dirrected at side A. And the force exerted from to the ground is friction therefore it's not vertical. Side A receives from Side B needs to be cancelled by the friction force side A exerts to the ground or side A will accelerate towards side B and therefore, losing. To win, not only does the person has to exert a force equal to that of the force he receives from his opposite side, he must exert more friction force then his opponent's. Annie won because she exerted more friction force onto the ground then Winny did.
If I chose A as the answer, then it wouldn't make since as there is only one force acting and no sides will gain acceleration because of newton's 3rd law.
And oops, I think I made a mistake with the last part of the question. Scratch the 45 degrees part, I got it confused with another question.

Actually, there are two forces, Annie's force and Winny's force. Also frictional force is only applied during movement. Acceleration doesn't matter in this problem.

Also, the forces are going through the ROPE, which is what A is talking about. The forces on the ground by Annie isn't felt by Winny at all.

But fine, go with c and get the question wrong. According to your theory, im standing here, exerting a force on the ground, everyone who is exerting a force less on the ground should fall. I mean, what does an engineer know?

[Hits]

Actually, there are two forces, Annie's force and Winny's force. Also frictional force is only applied during movement. Acceleration doesn't matter in this problem.
Also, the forces are going through the ROPE, which is what A is talking about. The forces on the ground by Annie isn't felt by Winny at all.
But fine, go with c and get the question wrong. According to your theory, im standing here, exerting a force on the ground, everyone who is exerting a force less on the ground should fall. I mean, what does an engineer know?
Oh my, aren't we feeling a little cocky?

I never said anything like that, please read my answer again. Since the amount of forces both ends receive from the rope is the same, there is no movement. But you have to consider the force the receive from friction between their feet and the ground. The winning person is the one that has more friction force then the other. If you don't believe me, google search "tug-o-war physics" and see for yourself.

[s3r3n1ty]

Well-been thinking. Isnt it a combination of a and c? True you use legs to exert the force. You also pull with arms. Isnt all force enevitably exerted on the rope ( as you are pulling the rope after all). The resultant force that annie exerts on the rope is greater than the res. force that winny exerts on the rope.

You would also need to push against the ground at an angle btw

[blueice760]

Oh my, aren't we feeling a little cocky?
I never said anything like that, please read my answer again. Since the amount of forces both ends receive from the rope is the same, there is no movement. But you have to consider the force the receive from friction between their feet and the ground. The winning person is the one that has more friction force then the other. If you don't believe me, google search "tug-o-war physics" and see for yourself.
I AGREE TOTALLY with what HitsugayaT says. I truelly believe c) is the correct answer, as for Bastaldo, you should not diss engineers like that.

[Draffut]

Bastaldo is right, partly becuase of Hitsugaya's reasons. To move the other person, the ammount of force you apply to the rope has to exceed all opposing forces. this includes the horrizonal pull of the rope, and the friction between the 2 people and the ground below them. Friction in this case is also a horizontal force opposing both people.

Winny could be exerting a tremendous force on the ground below his/her feet, but is the other person applies enough pull on the rope to overwhelm the frictional force, that force becomes neglible.

[s3r3n1ty]

Bastaldo is right, partly becuase of Hitsugaya's reasons. To move the other person, the ammount of force you apply to the rope has to exceed all opposing forces. this includes the horrizonal pull of the rope, and the friction between the 2 people and the ground below them. Friction in this case is also a horizontal force opposing both people.

Winny could be exerting a tremendous force on the ground below his/her feet, but is the other person applies enough pull on the rope to overwhelm the frictional force, that force becomes neglible.


Basically what I said...

[dragoneyes001]

dragoneyes can u help me with that book
thanks guys

the only part i can really help with is the A) section most of the rest are based on your writing or what was read from the book.

A) colum a-b: 1-C 2-D 3-E 4-A 5-B colum c-d: 6-C 7-J 8-I 9-F 10-G

its not really hard to write the words into sentences:

to avoid harmful surgery they tested the growth to see if it was benign.

at the party Mike was exuberant but Paul was downcast.

this assumes you need to use both original and antonym in same sentence.

[Hits]

Bastaldo is right, partly becuase of Hitsugaya's reasons. To move the other person, the ammount of force you apply to the rope has to exceed all opposing forces. this includes the horrizonal pull of the rope, and the friction between the 2 people and the ground below them. Friction in this case is also a horizontal force opposing both people.
Winny could be exerting a tremendous force on the ground below his/her feet, but is the other person applies enough pull on the rope to overwhelm the frictional force, that force becomes neglible.
I agree, it should be both A and C. Annie could've won even she did not exert a larger force onto the ground then the other person but exert a larger horizontal force onto the rope then the person is exerting onto the ground.

Ok, I asked my teacher and he said that there is no real clear answer but the best one would be C. It could very well be A but he gave us this answer to shows us the defect that students thinking only one horizontal force is present at a simple action such as pulling.
@Bastaldo, sorry if I sounded mean when I said you were "cocky". I didn't mean it that way, it was a joke. =] Sorry.

[theCandyman]

I think you can rule out A because the force on ground transfers to the rope.

HitsugaT, you wouldn't happen to be using Randall Knight's "Physics for Scientists and Engineers" book would you?

[Hits]

No, I'm using McMahon Applied Sciences.

[grimm_fans]

Need Math Help

To find the width of a river, a surveyour marked 2 points A and B on the opposite sides of the river as shown in the diagram. He then marked another point C along the river side so that the points B and C are 50m apart. from C, he measured <ACB to be 38'28'. What is the width (x) of the river?

x is AB

Please do it step by step

[Hits]

Need Math Help
To find the width of a river, a surveyour marked 2 points A and B on the opposite sides of the river as shown in the diagram. He then marked another point C along the river side so that the points B and C are 50m apart. from C, he measured <ACB to be 38'28'. What is the width (x) of the river?
x is AB
Please do it step by step
so angle C is 38 degrees, or is it 28? Anyways, it's quite simple since it is a right-angle triangle. You are trying to find the adjacent side of <C and you already know the opposite side of C which is BC(50m).
1. Figure out which of the three trig ratios to use. Since we know the adjacent and are trying to find the opposite side, you use the ratio has opposite and adjacent, which is TAN. You will need a scientific calculator.
2. tanC=opp/adj. You put the known numbers into the equation -->
tan38=x/50.
3. Use a calculator to figure out what tan38 equals. It is .78 if you round it up.
4. now we know that .78=x/50. Isolate x. -->
.78(50)=x
x=39meters.

There you have it.

[재]

wow, how old are you, seems like a hard one. i don't understand.

[Hits]

wow, how old are you, seems like a hard one. i don't understand.
that question was like gr.7 math, lol.


I have an essay I have to write for my Socials class. the topic:

In your opinion, is nationalism just a glorified form of patriotism or a catalystic behavior for racism and imperialism? Was nationalism the cause of genocidal events like the Holocaust?

I don't really need help on the essay but I would like to know what everyone's opinions are and why. I would to have a firmer grasp on this topic before I start.

[grimm_fans]

so angle C is 38 degrees, or is it 28? Anyways, it's quite simple since it is a right-angle triangle. You are trying to find the adjacent side of <C and you already know the opposite side of C which is BC(50m).
1. Figure out which of the three trig ratios to use. Since we know the adjacent and are trying to find the opposite side, you use the ratio has opposite and adjacent, which is TAN. You will need a scientific calculator.
2. tanC=opp/adj. You put the known numbers into the equation -->
tan38=x/50.
3. Use a calculator to figure out what tan38 equals. It is .78 if you round it up.
4. now we know that .78=x/50. Isolate x. -->
.78(50)=x
x=39meters.
There you have it.

thanks hitsugayat, and the diagram is not that useful, this is grade 8 hong kong math

[Hits]

thanks hitsugayat, and the diagram is not that useful, this is grade 8 hong kong math
Are you serious? Wow, I thought math in asia was a lot harder.

[grimm_fans]

don't know what holocast is but i know what capitalism is will that help you

the angle C is 38 then there is like a little circle then 28
like this 38o28

[Hits]

don't know what holocast is but i know what capitalism is will that help you
The topic really has nothing to do with capitalism, lol. But I'd care for your opinion anways.

Btw, the Holocaust was basically a massive genocide of jews and other minorities by nazi germans in europe during the world war 2 time.

[재]

so how old is grade 8? im only 15 yrs old.
anyway sorry can help you on your essay, i don't udnerstand what you mean there m,y english isn't very good. sorry.

[brolijc]

Are you serious? Wow, I thought math in asia was a lot harder.

hmmm when you learn that chapter? i learned it kind of like when i was 13 or 14 couldn't remember

[dragoneyes001]

The topic really has nothing to do with capitalism, lol. But I'd care for your opinion anways.
Btw, the Holocaust was basically a massive genocide of jews and other minorities by nazi germans in europe during the world war 2 time.

nationalism can be all of the above.

both a glorified form of patriotism and a catalyst for acts like the holocaust it depends on the person or persons.

there are forms of nationalism that are quite benign like during the Olympics being proud of your country's efforts.

there are also harmful types of nationalism like what happened in Germany when it was taken to mean the exclusion of others.

the holocaust was the attempted extermination of European jews by the germans where they segregated, abused and shipped jewish people from all over conquered europe to concentration camps and about the middle of the war they started what was called the "final solution" where instead of working the jewish people to death they just outright mass murdered them.
the number of dead jews during the war attributable to German killing was 6,000,000
the Russian military that were captured did not fare much better of the 5 million captured only 2 million survived.

[Shinigami_Josh]

the holocost was caused by many reasons like the jews forcing a lot of german citizens into and under the povity line

edit: any one know an esay way to add and subtract hex?

[s3r3n1ty]

that question was like gr.7 math, lol.


Gr 7! OMG! I hate the crap level of education in my country. In my country thats like 9 or 10

[Shinigami_Josh]

@grim do you mean 38o28 danm the bb dont work well the o s a super script like the degrees o and is there a strike in the same spot after the other number?

[s3r3n1ty]

@brolijc: Did that chart thing work

[grimm_fans]

@grim do you mean 38o28 danm the bb dont work well the o s a super script like the degrees o and is there a strike in the same spot after the other number?

Yep that's what i was trying to put thanks

Need science help this time

Help for Question 1,2,4,6
^
http://i73.photobucket.com/albums/i236/OmegaKaos123/untitled-scanned-020.jpg

Help for Question 1-3
^
http://i73.photobucket.com/albums/i236/OmegaKaos123/untitled-scanned-010.jpg

Thanks

[Shinigami_Josh]

well the wave thing depends on the location
things on the beach are smooth beacuse the waves gerenrate fricion which ribs them smooth
the beach frount resort would have to look at wave erossian
and surfers borads act like "sails" and are pushed by the waves

the thing i was saying before means that its in DMS which is degrees min sec

so any one know adding/subrtaction hex?

[Draffut]

that question was like gr.7 math, lol.
I have an essay I have to write for my Socials class. the topic:
I don't really need help on the essay but I would like to know what everyone's opinions are and why. I would to have a firmer grasp on this topic before I start.

maybe where you are, but here in the Stupid People's Republic of America, that is no less then 9th grade material. most dont tkae it till year 10. (Trig was fun stuff.)

[s3r3n1ty]

1. Long, because the alternating swash and backwash of waves will keep the bottle from reaching the land (for a while anyway)

2.As shinigami josh says

3. Where is the 'Try this activity'

4.What shinigami josh said. As well as the distance on shore. Obviously u would build it above the high water mark, possibly even above the strormwater mark. This should also be a beach that deposites more than it erodes (ie. constructive beach). Otherwise it would be a pebble beach. Also things such as local winds (for things that need wind). There are many things to mention.

5. Think natural harbours protect things behind them with hard resistant rock. idk tho

6. I think it has to do with the way the wave pushes the board.

[dragoneyes001]

1) currents are the factor that will determine how quickly or not the bottle will reach land a quick current that happens to be heading away from land will lengthen its trip or the opposite if the current is going towards shore.

2) both friction between the stones and the waters erosion will smooth pebbles

3) no example to work from.

4) accessibility, erosion of the land, water levels at storm peaks, how solid the bed rock is that will support the structure, environmental impact study, availability of materials, local builders cost, popularity of the region for tourism, availability of local work force ...etc...

5) natural harbours are cut off from the direct affect of open wave patterns reducing wave erosion on its surroundings.

6) when a surfer starts to ride a wave they are using gravity to fall down the face of the wave the board just keeps them from sinking into the wave and allows the downward force to be translated into forward momentum.
its the same as riding a skateboard down a hill.

[s3r3n1ty]

1) currents are the factor that will determine how quickly or not the bottle will reach land a quick current that happens to be heading away from land will lengthen its trip or the opposite if the current is going towards shore.


Yeah...this also...

I cant believe I never thought of that

[grimm_fans]

Yep that's what i was trying to put thanks
Need science help this time

Help for Question 1-3
^
http://i73.photobucket.com/albums/i236/OmegaKaos123/untitled-scanned-010.jpg
Thanks

Thanks for your help guys but i don't get these also Thanks

[s3r3n1ty]

This is gr7 work right? What country you from grimm_fans?

[grimm_fans]

It is grade 8 science from canada
the math is from the saturday math school

[s3r3n1ty]

*sigh* its still more advanced than in my country :(

And I finally need some help:

In an infinite series of circles, the radius of the 1st circle is 90cm and the radius of each successive circle is 2/3 of that of the preceding circle. Find the sum of the areas of the circles.

You must use geometric sequences

[grimm_fans]

1st one-90 r
2nd one-60 r
3rd one-40 r
4th one - too lazy to calculate

that is a bit hard , and i am not with geometric only mental math

[DragonBlade]

*sigh* its still more advanced than in my country :(
And I finally need some help:
In an infinite series of circles, the radius of the 1st circle is 90cm and the radius of each successive circle is 2/3 of that of the preceding circle. Find the sum of the areas of the circles.
You must use geometric sequences

I suck at math but I believe you need to use the horrid Riemann Sums.

N=1->Infinity E (Area Equation Implementing 2/3).

Lied. Need to Use Infinite Geometric Sums

Need the first term which is 8100Pi
R = 2/3
Equation to use:
http://img54.imageshack.us/img54/5920/infinitegeometricsum6vb.jpg
a_1 = 8100Pi

[재]

woww i mean how old are you guys, i ahven't even been taught that. i ma 14

[Hits]

another math problem. i officialy suck at quadratic and linear relations.

write an equation for the line that is tanget to the circle x^2+y^2=85 at the point (-6,-7)

well, the slope of the radius is m=7/6

[재]

quadratic is algebra right? well i like algebra, but it seems to me that the Q is for higher grade than me. so i can't help

[s3r3n1ty]

I suck at math but I believe you need to use the horrid Riemann Sums.

N=1->Infinity E (Area Equation Implementing 2/3).

Lied. Need to Use Infinite Geometric Sums

Need the first term which is 8100Pi
R = 2/3
Equation to use:

a_1 = 8100Pi


Dragonblade, its the radius thats 2/3 of the last circle. not the area of the circle, but maybe it will work. thx for the help.

wtf is Rienmann sums?

@hanzel2m: Im 18

@hitsugayaT: thats easy: if you know the gradient radius, the grad of the tan will be perpendicular(opp sign plus inverted), then just substitute the point into the str line equation!

Ill work it for you- slope of tan=-6/7

Eq now y=-6/7x+c
must find c and to do so be substitute a point that lies on the line
(-6;-7)
-7=-6/7(-6)+c
c=-36/7-7
c=-85/7
y=-6/7x-85/7

Odd answer, did you give the correct values

[재]

oh so you guys are 18? so you finish school already? wow okay this isn't the place for me then.

[DragonBlade]

http://en.wikipedia.org/wiki/Riemann_sum For Riemann Sums

I assume 2/3 of the preceding Circle's radius would also account for the 2/3 of the preceding circle's area unless I'm wrong.

I'm 19, not finish with school and somewhat need help with DE and Vector Calculus

[재]

so you are still in school?? if it's university then that isn't school. well i mean if it's university then it's different story.
anyway in here when we are 17 we get a choice of doing statistics or calculus. and 17 yrs old in my schoool would be called form 7 or year 13. that's the ned of your school then up to you to universuty.

[Endess Wings]

Well i do all my homework at school!

[s3r3n1ty]

I am still in school-im going to university next year!

Wow, Rieman sum look difficult, tho I have not done integration so no wonder

DE=differential equations?

umm...vector calculus-i dont think ive done that

Anyway, I found the answer out- it isnt 2/3 of the area as I suspected-you had to make a new common ratio expressing the area in it by dividing term2 by term1. (Of area)

Thx for the help tho

[grimm_fans]

i am in elementary shop...

so that's why i can't help most people but i need help...

[blueice760]

hmm
maybe i can help with the DE and the Vector Calculus

[재]

grimm_fans, what is elementary shop??
how old are you? because the school grades are different in all country.

EDIT: well i have a new peob now.sinc you can't dbl post so i edit.
anyway i have an exam in the next 2 days, and i am missing one piece f info. so pls help, here's the Q:
list the surces of fuels.
okay theat's the info im missing, can someone help?
thx

[s3r3n1ty]

Hmm...
http://journeytoforever.org/biofuel_library/biochem_fuel.html
http://www.darvill.clara.net/altenerg/fossil.htm
http://egj.lib.uidaho.edu/egj09/youngqu1.html
Heres some-I hope I got this in time for ur exam.

[DragonBlade]

hmm
maybe i can help with the DE and the Vector Calculus

Lol, I got destroyed by Divergence Theorem. Totally forgot it. I also switch the answer style of Curl and Divergence of which I lost 10% of my total grade. Such a nasty exam :/

[s3r3n1ty]

Damn, Dragonblade, what grde are you in? i dont know wtf you talking about lol!

[Lolable]

dang,i can try helping with medical stuff if u want -_-
but i am still freshman

[DragonBlade]

Damn, Dragonblade, what grde are you in? i dont know wtf you talking about lol!

2nd year in College/University. This week is finals week then long ass vacation :D.

[재]

okay one more problem. which line is longitude nad which line is lattitude?

[ChansteR]

the verticle line is longitude and the horizontal line is lattitude (I think, I dont remember my geography)

I need a more challenging problem lol to excersize my brain....