Physics - November 2007

A particle oscillates with a mass of (10)g and an amplitude of (2)mm. If it's maximum acceleration is (8X10^-3)m/s^2 write the function of the forces that influencing it as a function of time.

note: sorry about my crappy language as it's my first time writing aproblem in english ><

2007-11-21 05:33:07 · 1 answers · asked by Anonymous

what provides centripetal force for a car driving in a circle ?
is it traction or friction ? cause i heard both answers.

2007-11-21 05:12:55 · 5 answers · asked by Anonymous

Why do we spend so much money on manned and un-manned space slights when so much can be learned about our universe in other ways?

Such as: Large telescopes in orbit, building accelerators, etc.

2007-11-21 05:07:17 · 13 answers · asked by Anonymous

I am asking this to see how high a microgravity drop tower would have to be to allow an experiment to drop for 12 seconds. The drop tower would of course be vacuum-sealed to allow the highest quality microgravity (hence "neglecting air resistance"). How far would something have fallen if in a vacuum after 12 seconds of free-fall?

2007-11-21 04:56:32 · 3 answers · asked by Anonymous

If I have a 1g rocketship (constant acceleration of 1 g all the time) and go tooling around exploring the solar system and then I come back to earth after 1 year, why, under gr, does my clock read slower than my twin brother back home. Haven't we both been experience the acceleration?

[Question inspired by seeing answers to a recent relativity question]

2007-11-21 04:32:03 · 4 answers · asked by Frst Grade Rocks! Ω 7

I need to know this for a project

2007-11-21 04:08:19 · 3 answers · asked by Nana R 2

2007-11-21 03:46:02 · 9 answers · asked by Anonymous

If it is possible, I would like some ideas as to which car would be easiest or best to convert. I would like to imagine a car that can be very easy to replace the batteries, perhaps in clusters?
Also, is there any safelty issues with AA betteries?

2007-11-21 03:44:15 · 14 answers · asked by dan h 2

Suppose that you are in the vacuum very far from everything, so gravity doesn't affects you so much. You are with a friend, and both of you has a digital clock. Both of you decide to coordinate the clocks. Then both of you decide to "travel" with a constant velocity and then come back to were you were, to compare the clocks. In your point of view, your friend's cloks is late compared to yours, and your friend has the same feeling, in his case it's your clock that is late. So when you come back to see the clocks, which is really late?

2007-11-21 03:39:49 · 5 answers · asked by Anonymous

I don't get string theory at all. Could some one explain it to me, or give a link to a website that does?

2007-11-21 03:30:13 · 5 answers · asked by Anonymous

(a)in going a mile?
(b)in going a kilometer?

2007-11-21 03:02:34 · 5 answers · asked by Anonymous

Several volcanoes have been observed erupting on the surface of Jupiter's closest moon, Io. Suppose that material ejected from one of these volcanoes reaches a height of 4.20 km after being projected straight upward with an initial speed of 240 m/s.
(a) Given that the radius of Io is 3303 km, outline a strategy that allows you to calculate the mass of Io.

(b) Use your strategy to calculate Io's mass.
kg

2007-11-21 02:58:02 · 2 answers · asked by Amber G 2

2007-11-21 02:24:55 · 5 answers · asked by Anonymous

Two blocks of mass m1 and m2 rest on a frictionless table and are connected by a spring. The blocks are pulled apart, stretching the spring, and then released. Describe the subsequent motion of the two blocks.

Physics conceptual question, please help thank you! I will def. rate A++ for the best answer!

2007-11-21 02:13:26 · 2 answers · asked by Kiwikahuna 2

A solid, square pinewood raft measures 5.0 m on a side and is 3.50 m thick. What is the total mass of swimmers that the raft can carry and float with its top surface at water level?

2007-11-21 02:06:22 · 1 answers · asked by J.Mo 1

that expels 35 g of hot gass at 875 m/s. the combined mass of the astronaut and pistol is 84 kg. how fast and in what direction is the astronaut moving after firing the pistol?

2) a 2 kg ball, a is moving at a speed of 5 m/s. it collides with a stationary ball, b of the same mass. after the collision, a moves off in a direction 30 degrees to the left of its original direction. ball b moves off in a direction 90 degrees to the right of ball a's final direction. how fast are they moving after the collision?

2007-11-21 01:17:02 · 1 answers · asked by wahoo 1

Three 5.00 kg masses are at the corners of an equilateral triangle and located in space far from any other masses.

(a) If the sides of the triangle are 2.45 m long, find the magnitude of the net force exerted on each of the three masses.
N
(b) What would your answer to part (a) be if instead the sides of the triangle are doubled in length?
N

2007-11-21 01:10:59 · 3 answers · asked by Amber G 2

This is a physics textbook conceptual question, please help! thanks!

2007-11-21 00:59:36 · 10 answers · asked by Kiwikahuna 2

Centrifical force seems to assert that the faster the rotation, the lower the gravitational field but people always have told me the opposite. How come. Which is it?

2007-11-20 23:58:37 · 5 answers · asked by Rev TL 3

rotate at the equator and if so, in which direction?
Do neighbours, living on opposite sides of the equator, observe water draining in different directions. Now I'm talking about people living very near, north and south of, the equator.

2007-11-20 23:49:32 · 3 answers · asked by Anonymous

a) compute for maximum height
b) total time of flight if it covers a distance of 150ft
c) initial velocity of the ball

Need help.

2007-11-20 23:33:14 · 2 answers · asked by Anonymous

I need help with problem solving but have answers...

A 2.50 g bullet, traveling at a speed of 425 m/s, strikes the wooden block of a ballistic pendulum, such as that in figure 7-17 in your text. The block has a mass of 215 g. Find the speed of the bullet/block combination immediately after the collision.

2007-11-20 23:06:06 · 1 answers · asked by PinkyTrauma 2

I need help working out problems but I have the answers so your help is appreciated..

Two brothers, Dustin and Parker, have a combined mass of 168 kg. At an ice skating rink, they stand close together on skates, at rest and facing each other, with a compressed spring between them. the spring is kept from pushing them apart because they are holding each other. When they release their arms, Dustin moves off in one direction at a speed of 0.90 m/s, while Parker moves off in the opposite direction at a speed of 1.2 m/s. Assuming that friction is negligible, find Dustin’s mass.

2007-11-20 23:04:48 · 2 answers · asked by PinkyTrauma 2

Here is another physics problem... I have answers need help problem solving

A projectile of mass 0.750 kg is shot straight up with an initial velocity of 18.0 m/s. If the projectile rises to a maximum height of only 11.8 m, determine the magnitude of the average force due to air resistance.

2007-11-20 23:01:32 · 2 answers · asked by PinkyTrauma 2

2007-11-20 21:37:24 · 4 answers · asked by bio_addict 1

2007-11-20 18:10:06 · 2 answers · asked by David C 1

Considering the fact that it was a fair test.
And do explain why

2007-11-20 17:41:36 · 4 answers · asked by Kirin Desuke 2

c string 944 N , 1.26 M for wave length and 3.82ms period, what is the linear density of the string .................... what equation did you use??????????

2007-11-20 16:51:46 · 1 answers · asked by tony 2

Ahh! I'm working on HW for my physics class on masting physics and I only have one more try on this problem:

An earth satellite moves in a circular orbit with an orbital speed of 6100 m/s. Find the time of one revolution. Find the radical acceleration.

Can someone help? This is all the data I was given

2007-11-20 16:42:57 · 3 answers · asked by Anonymous

In joules/gram

2007-11-20 16:41:30 · 1 answers · asked by Anonymous