Physics - July 2007

2007-07-12 16:07:34 · 4 answers · asked by foxxymama 1

Which ball has greater acceleration when it hits the ground? Which ball hits the ground first?

2007-07-12 15:51:26 · 7 answers · asked by clue_less 1

Well I have a lot of trouble explaining stuff related to physics so it would be really nice if someone can help me..
As water waves approach a beach, their wavelength decreases. If the frequency of the waves does not change what must be happening to their speed explain?

Water waves near the base of a cliff often possess greater amplitude than those out a bit farther from the base, why?

A creast moves through a point, in what ways is the motion of that point like the motion of a ball thrown straight upward?

As a transverse wave travels along a spring, where is the speed of the spring greatest? and least?

2007-07-12 15:43:13 · 1 answers · asked by Anonymous

Can someone please tell me what the speed of sound is? All I can find is equations and stuff. Thanks so much

2007-07-12 15:37:22 · 8 answers · asked by Kellersmommy 2

A 2.8 m rod standing on its end is allowed to fall. The falling tip traces an ARC. Find the speed of the tip when it hits the floor.
I would like to see how it is done. The answer is supposed to be 6.4m/s
I am asking to find the velocity of the tip that is falling, so the top one.

2007-07-12 15:11:39 · 3 answers · asked by House music rules 1

Is the sling shot effect a possiblity if space travel was ever perfected, and how much energy would actually be needed to acheive this?
Im just curious

2007-07-12 15:11:19 · 3 answers · asked by Jay D 1

I'm talking about the Discovery channel show where they test theories to see if their myths or not.

My college physics teacher makes fun of the show ALL THE TIME. He knows a lot and doesn't need "theories" to waste for an hour to find an answer. Simple things like "Can I person in a free falling elevator surive if they jumped before they impact the floor?". That can be solved in seconds. No, they cannot, just jumping won't make a difference to the velocity/speed your going down.

From this, I have questions:
Do the myth busters not know anything?
Do they do it for the tv viewers to learn?
Do you really need to blow stuff up to get results?
Can't they teach the viewers Newtons Laws?

2007-07-12 14:50:31 · 14 answers · asked by Anonymous

This question has been making me ponder. If a tree falls in a forest but no one is around to hear it does it make a sound? I say yes, what do you think.

2007-07-12 14:42:36 · 18 answers · asked by Anonymous

So let's say you have an object that could crush anything and another object that could not be crushed at all.
If the first object, that couild crush anything, tried to crush the object that could not be crushed, what would happen?

2007-07-12 14:01:12 · 9 answers · asked by nerris121 4

2007-07-12 12:36:19 · 5 answers · asked by perry 1

2007-07-12 12:26:38 · 4 answers · asked by Buck BUCK 2

This is a theory I created from a dream I had.
Say we build a factory. It only function would be to build an Identical factory 1/2 its original size and turn it on. That factory would then build another one etc. Included in the function of the factory would be to find materials around it to build the second factory. The necessary materials would be placed in the area of the first few factories.

2007-07-12 12:18:22 · 7 answers · asked by Anonymous

why are you so slow in answering...

2007-07-12 12:02:05 · 7 answers · asked by ixat02 2

Lets say you put some matter in an ideal contraption of some sort.
This contraption can hold it regardless what the matter does, expansion etc.
and you start inducing energy to it, making it heat up.
and do that nearly endlessly.
what would happen ?
is there any upper limit given till you cannot heat it up anymore ?

of course this is fictional cause at some point you may loose your contraption or you run out of energy, but assume its an ideal place ... what will happen ?

2007-07-12 11:51:33 · 11 answers · asked by blondnirvana 5

2007-07-12 11:02:13 · 15 answers · asked by chantellechanters 5

how wide should be the hole to suck in the entire
atmosphere?

2007-07-12 10:54:42 · 9 answers · asked by Alexander 6

2007-07-12 09:55:49 · 12 answers · asked by Josh Muller 1

2007-07-12 09:52:02 · 3 answers · asked by Willie007 1

2007-07-12 09:19:56 · 6 answers · asked by Mr. Classic 1

2007-07-12 08:08:44 · 7 answers · asked by Damski007 2

a) Alexander
b) Floodtl
c) Dr H
d) BekkiB
e) Some other troll

2007-07-12 08:00:20 · 7 answers · asked by Anonymous

Where are some places that we could build a nuclear fusion reaction, and what might be some negitive side effect of building a fusion reactor?

2007-07-12 06:48:24 · 5 answers · asked by ghilliemarine 2

2007-07-12 06:43:42 · 6 answers · asked by Anonymous

why do people bend down while getting off a chopper?

2007-07-12 06:24:38 · 6 answers · asked by Anonymous

A universe as defined for its Latin translation meaning all in one. Or even its normal translation "all existing matter and space condensed as a WHOLE." Is it possible that there are universes inside of atoms?

2007-07-12 06:05:19 · 6 answers · asked by Anonymous

I just want to know how fuel cells work as I am doing research on it. Here is what I know.
I know that a fuel cell uses hydrogen to convert it into a form of electricity that the cars can use. There are exothermic reactions that release energy and endothermic reactions that absorb energy. Our goal is to separate the hydrogen from the water. so set up 2 equations
1. Water- 2H+O-energy
2. Water-2H+O+energy
we want to get energy and not to make it so we go for the first one right. I am a bit lose so please help

2007-07-12 05:53:24 · 4 answers · asked by Anonymous

2007-07-12 05:46:36 · 13 answers · asked by Bill W 【ツ】 6

the velocity of a particle moving in the +ve direction of x-axis varies as v = 5x^1/2 .assuming that at t=0,v=0.find the acceleration of the particle at x=1 metre.......??


a particle moves in the direction of east for 25 secs with a velocity of 15 m/s .then,it moves towards north for 8 secs with a velocity of 5 m/s.the magnitude of average velocity will be...............??

2007-07-12 05:37:29 · 3 answers · asked by shivam 2

Hi, i'm having a bit of trouble with a question here, if anyone can give me some pointers, it'd be really helpful.
Inside a small electron gun, an electron is passed through a potential difference of 100kV. Initially at rest, the electron emerges from the electron gun with a speed comparable to the speed of light.
Use the Newtonian expression for kinetic energy to estimate the electron's final speed.

OK, i know that the newtonian expression for kinetic energy is Ek=1/2 mv^2, but surely the final speed of the electron is the speed of light, or am i missing something here ?
I can work out the kinetic energy of the electron easy enough, but i thought i already had the speed, so what's going on here ?
Any help would be appreciated thanks.

2007-07-12 05:20:27 · 3 answers · asked by David M 1

Does the rate of gasoline consumption go up as the volume of gas goes down or is it a constant rate?

2007-07-12 05:03:54 · 4 answers · asked by Anonymous