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Physics - December 2006

[Selected]: All categories Science & Mathematics Physics

I am a physics student. Recently we had a workshop in which we were asked a general knowledge question:- Does weight remain constant throughout the world?..I know the answer is related to "acceleration due to gravity, g", but i am not able to find the exact answer. Please help me

2006-12-07 20:24:45 · 8 answers · asked by Payal V 2

2006-12-07 18:53:39 · 17 answers · asked by bhupesh g 1

A truck driver is transporting a fully in-closed trailer full of birds. He knows he is over weight so he pulls over to the side of the road before the scale and bangs on the trailer, causing the birds to go into flight. He then drives over the scales. Did the weight of the trailer change?

2006-12-07 18:24:16 · 6 answers · asked by think650 1

Imagine you are in a closed rotating spaceship. You could tell exactly how fast you are rotating, and by deduction from the ship dimensions and forces, you could tell your absolute velocity. Or have I missed something?

2006-12-07 18:22:05 · 8 answers · asked by Rich 2

A small sphere of wood with a density p=0.40 g/cm^3 is held at rest well under the surface of a pool of water. What is the magnitude of the initial acceleration of the sphere when released?

Possible Ans:
a.)15 m/s^2
b.)9.8 m/s^2
c.)33 m/s^2
d.)23 m/s^2
e.)3.4 m/s^2

2006-12-07 18:13:57 · 1 answers · asked by Tindallshi 2

A.)0.81 km, B.)4.6 m, C.)1.6 km, D.)76 cm, E.)10 m

Please help; this problem is due before noon of today.

2006-12-07 17:53:22 · 3 answers · asked by Tindallshi 2

Two forces are applied to a car in an effort to accelerate it.

Please let me know how to actually figure out this answer since I am doing it incorrectly. I dont need the solution but I need to know what to do...

A car is driving straight up.
The first force is 10 degrees to the West of the vertical line that goes through this car. (450N)
The second force is 30 degrees to the East of this vertical line (380N)

What si the resultant of these two forces?

2006-12-07 17:38:25 · 2 answers · asked by billf39 2

what is the gravitational PE of the ball at its highest position?
what is the KE as soon as it leaves your hand?

2006-12-07 17:36:39 · 3 answers · asked by Anonymous

Because All i can think of is Iron, Nickel and _________.... soo yea someone help me please

2006-12-07 17:26:53 · 5 answers · asked by dragonmekill 2

I took physics last year and am helping a friend with this problem. I thought it was easy, but keep getting the answer to be 3096.1875, which is wrong, can someone help me.

A 10.00 kg block hangs from a spring. A 110 g body hung below the block stretches the spring 3.20 cm farther.
What is the spring constant?

2006-12-07 17:20:55 · 2 answers · asked by Michael E 2

A book with a mass of 2.0 kg is held in equilibrium on a board with a slope of 60.0 degrees by a horizontal force. What is the normal force exerted by the book?

2006-12-07 16:48:18 · 2 answers · asked by Anonymous

I know that the wave qualities are different... I want to know about the photons. And do radio waves also carry photons?

2006-12-07 15:56:58 · 7 answers · asked by Willem V 3

suppose a bird drops a nut from a tree. the speed of the falling nut at the moment 50 m above the ground is 42.7 m/s. how tall is the tree? do you need to know the mass of the nut to solve this problem? disregard air resistance.

2006-12-07 15:55:51 · 4 answers · asked by maggie 1

Okay, I think I have a better description of what I was getting at before now. When you read about the perception of passing time at light speed, there are descriptions of, for example, something moving at light speed observing something that isn't and vice versa and their perceptions being different to reality. BUT, in these cases, the people at light speed are actually passing through time at a different rate, I know this is to do with the fact that they are travelling but... Oh dear, I am confusing myself more now! Somewhere in that is something to do with flies perceiving things as faster than we do but I don't know if i am making enough sense for anyone to explain it to me!

2006-12-07 15:44:32 · 8 answers · asked by melissa v 2

If we can make satellites orbit our planet, can you apply the same idea to magnetism and fire a piece of metal at the perfect velocity, in a vaccuum, to make it orbit a magnet?

2006-12-07 15:40:17 · 7 answers · asked by Curious George 1

its conceptual physics please help me!!!!!!!!!!!!!!!!!!!

2006-12-07 15:37:58 · 8 answers · asked by Anonymous

If you eliminate wind drag would a person and a tank hit the ground at the same time.

2006-12-07 15:13:12 · 8 answers · asked by rubenff2000 1

2006-12-07 14:54:49 · 7 answers · asked by Wafeeq 1

1. A child throws a 5.40 kg package horizontally from a boat with a speed of 10 m/s. Calculate the resulting velocity of the boat, assuming it was initially at rest. The mass of the child is 25 kg and the boat is 55 kg.

2. An atomic nucleus at rest decays radioactively into an alpha particle and a smaller nucleus. what will be the speed of this recoiling nucleus if the speed of the alpha particle is 3.8 x 10^5 m/s? Assume the recoiling nucleus has mass 57 times greater than that of the alpha particle.

The answers from the back of the book are 1) -0.675 m/s
and 2) -6.7 x 10^3 m/s.

I don't understand how to get these answers so please show your work and explain. Thanks!

2006-12-07 14:54:27 · 2 answers · asked by hdwong58 3

2006-12-07 14:27:07 · 9 answers · asked by Anonymous

How does the centripetal force of A compare to that of B?

the circle in part a, Has a radius of m and a period of .7 seconds
the circle in part b. has a radius of 2m and a period of 1 second

which centripetal force is greater?

first good answer=best

2006-12-07 14:18:36 · 4 answers · asked by Taylor R 3

The space station itself is a torus shape, and is designed so that one gee of gravity will be along the outer edge, and zero gees will be in the middle. Seems like it'd be fairly simple, but the answer's been eluding me. >.>
Oh, and you can't amputate any body parts. ;)

2006-12-07 13:26:58 · 6 answers · asked by Anonymous

A pitcher claims he can throw a baseball with as much momentum as a 1.1 g bullet moving with a speed of 4500 m/s. A baseball has a mass of 0:368 kg. What must be its speed if the pitcher's claim is valid? Answer in units of m/s.

2006-12-07 13:26:18 · 2 answers · asked by Maria M 1

HI,
I'm a +2 student and i would like your possible ideas on my physics project.Can you folks also tell me some sites from which i can get it.

2006-12-07 13:14:51 · 8 answers · asked by JOSE P 1

Find the elongation in a steel wire of length 1.35 m and diameter of 9.58 x 10^-2 cm if a mass of 15.0 kg is hung from it?

2006-12-07 13:01:30 · 1 answers · asked by Trevor M 1

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