Physics - January 2007

is it something related to the drinking water or bore water.

2007-01-05 17:56:37 · 4 answers · asked by santosh k 1

2007-01-05 17:55:49 · 4 answers · asked by Neelu 2

is it removal of water or just replacement of water with distilled water.

2007-01-05 17:46:55 · 2 answers · asked by Anonymous

working on science project to get a mousetrap car to go 18 meters

2007-01-05 17:38:17 · 3 answers · asked by Jeff 1

1.A jar of tea is placed in sunlight until it reaches an equilibrium temperature of 32°C. In an attempt to cool the liquid, which has a mass of 180 g, 134 g of ice at 0°C is added. At the time at which the temperature of the tea (and melted ice) is 16°C, determine the mass of the remaining ice in the jar. Assume the specific heat capacity of the tea to be that of pure liquid water

2007-01-05 17:19:26 · 1 answers · asked by Anonymous

2007-01-05 16:38:35 · 10 answers · asked by **~~;BaByBoo~~** 1

I nearly quarrel v teacher bcox of this Q. The Q is as following:

A hollow cylinder of mass M and radius R
(a) slides with a speed v
(b) rolls with the same speed without slipping on a horizontal plane.
What is the ratio of the kinetic energies of the cylinder in the two cases? [ Moment of inertia of hollow cylinder = MR^2 ]
A 1:4
B 1:2
C 1:1
D 2:1
Which is the answer?

2007-01-05 16:37:33 · 5 answers · asked by li mei 3

2007-01-05 16:07:59 · 2 answers · asked by bantu 1

im doing a science project and i need to make an electromagnet with only a d cell battery for the power sorce and it must work like a fishing pol that meens the magnet needs to be hung from a rod over 30 inches long and i also need to put a switch on it so i can turn it on and off easly pleas help o and pictures help but id perfer some one to explane how to make one or give me a real good enternet sit or something

2007-01-05 15:42:15 · 2 answers · asked by fwweston 1

2 points to answer this post
10 points for the best solution
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12
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waiting

2007-01-05 15:39:15 · 3 answers · asked by imran n 3

2007-01-05 14:59:48 · 9 answers · asked by chadl408 2

mechanical waves cause a disturbance in their medium which results in a sort of elastic restoring force. But how can a photon travel with no medium and no displacement?

2007-01-05 14:55:51 · 8 answers · asked by gollybegully 2

A 0.200 kg plastic ball moves with a velocity of 0.30 m/s. It collides with a second plastic ball of mass of 0.100 kg, which is moving along the same line at a speed of 0.10 m/s. After the collision, both balls continue moving in the same, original direction. The speed of the 0.100 kg ball is 0.26 m/s. What is the new velocity of the 0.200 kg ball?

Please help me with this problem.
I'm having trouble understanding it.

2007-01-05 14:34:28 · 7 answers · asked by vicky p 1

I don't mean have a large deep gapig hole such as a black hole I mean an actuall puncture and would gravity it self leak out and time it self eventually would it gradually slow down as it leaked out of the universe eventually coming to a complete stop?

2007-01-05 14:33:27 · 4 answers · asked by Concorde 4

2007-01-05 14:27:29 · 2 answers · asked by Anonymous

A 0.145 kg baseball is pitched at 42 m/s. The bater hits it horizontally to the pitcher at 58 m/s.

a. Find the change in momentum of the ball.
b. If the ball and are in contact 4.6*10^-4 seconds, what is the average force during contact?

Please help me with this question.
I'm having trouble understanding it.

2007-01-05 14:18:52 · 4 answers · asked by vicky p 1

A ship, carrying freshwater to a desert island in the Caribbean, has a horizontal cross-sectional area of 2700 m^2 at the waterline. When unloaded, the ship rises 6.00 m higher in the sea. How much water was delivered?

There was an identical one in my book with a cross-sectional area of 2650 m^2 and the ship rose 8.5 m high. In which the answer was 2.44 x 10^7. However when i try to solve it i always get 2.25 x 10^7. Isn't it supposed to be 2650*8.5*1000? If not could someone show me what i'm doing wrong? Also, show steps and how you got to your answer. Thanks.

2007-01-05 14:17:50 · 4 answers · asked by leon27607 3

Does it make any differences to the glass or mirror? and wat we can see?

2007-01-05 13:42:01 · 4 answers · asked by emikato_913 2

www.cheniere.org everyone should read this for all that its worth

2007-01-05 13:36:24 · 4 answers · asked by Dan B 2

I'm doing this for a science class and I can't tell if my capacitor is too weak or if something is wrong with it. Thanks

2007-01-05 13:32:05 · 7 answers · asked by Jack T 2

2007-01-05 13:26:59 · 6 answers · asked by musman717 1

2007-01-05 13:22:44 · 8 answers · asked by musman717 1

2007-01-05 12:54:24 · 5 answers · asked by sansu_924 1

I'm looking for a fresnel lens something like the once seen here, http://en.wikipedia.org/wiki/Image:MuseeMarine-phareFresnel-p1000466.jpg

I am looking for size "Third Order Large."

Thank you,
Max E.

2007-01-05 12:54:22 · 1 answers · asked by Max E 1

What is polonium used for. I know it must be used for weapons making or energy production

2007-01-05 12:40:31 · 3 answers · asked by Anonymous

2007-01-05 11:34:21 · 5 answers · asked by Anonymous

2007-01-05 11:33:32 · 10 answers · asked by Anonymous

In a physics class i remember my teacher trying to explain the idea of the atomic clock actually slows down and is behind the atomic clock left on Earth after it's been flying around in space for a while... and obviously to many black faces
But i also remember me asking is that do to with the clock or actualy time (a constant) slowing down?

If identical twins were seperated at birth, one being sent to space for 20 years, and the other living on Earth, when the twin returned, would it actually be physically and mentally younger?

And then if this is true: If time slows down when they were in space, it would constantly be ticking along slower, so wehn they come back to Earth, how does the time in space speed up and catch up the time on Earth?

Sorry if this is too long, im just curious
Thanks

2007-01-05 11:16:48 · 8 answers · asked by Anonymous

The theory of relativity says that if you were able to move away from the earth at close to the speed of light that when you return much more time would have passed on earth than you would have experienced. Why? It seems like if you were moving that fast that others would be moving slower relative to you, not faster. Can anyone explain in layman's terms?

2007-01-05 11:01:36 · 11 answers · asked by Stew88 1

I was recently at a club and as I stood there watching the laser show it appeared as if plugs of laser light were traveling thru the smoke. They moved from the origin thru the smoke, reflected off of a mirror and where redirected to the opposite end of the room. The "plugs" or "bullets" appeard to be about the size of a can of spray paint. They also appeared to travel about as fast as a bird flying across the room... like I could dodge them if I wanted to. My question is how. How did they appear to travel as bundles and how did they appear to travel at such a slow speed. A typical laser would have shown a solid stream of light either on or not on, right?

2007-01-05 10:12:03 · 1 answers · asked by onewrongstep 1