Physics - February 2007

and then after it has travelled an desirable distance from the earth, set off a nuclear explosion far out in space that will send the object hurtling past the earth at or over lightspeed, hopefully studying it as it passes?

2007-02-19 07:04:07 · 5 answers · asked by jkp 3

if light slows down in medium can we make sonic boom for light to travel faster than light as Cerenkov Radiation? if so , does the speed of cerenkov radiation travel faster than the constant speed of light or is it just becuz light slows down in the medium that the cerenko radiation can go faster than it with the same constant speed of light? OMG it is getting complicated in my head

2007-02-19 06:49:16 · 3 answers · asked by Anonymous

answer is 0.982 s, i just need to know how to do it

2007-02-19 06:47:52 · 2 answers · asked by Kayla H 1

I could probably just google this, but I like to have different opinions on things and really see what regular people have to say.

2007-02-19 06:39:33 · 8 answers · asked by **JEN** 2

1) Imagine a ferris wheel 2 meters in radius. At the top there is a 1 Kg weight, (2 m from the axis). If this wheel were allowed to rotate so that the weight moved to the bottom the work that could be done by this system would be ?

2) Same as 1, but now the 1 Kg weight at the top is some-what counter ballanced by a 1 Kg weight that is 1 meter from the axis on the opposite side of the wheel. ( As the top weight falls, the bottom one rises).

Please show equations!!

2007-02-19 06:37:38 · 1 answers · asked by Kender_fury 3

I NEED TO DO A RESEARCH PAPER ON IT.

2007-02-19 06:36:27 · 2 answers · asked by Travis M 2

2007-02-19 05:46:58 · 9 answers · asked by Anonymous

A particle, starting from point A in the drawing at a height h0 = 2.0 m, is projected down the curved runway. Upon leaving the runway at point B, the particle is traveling straight upward and reaches a height hf = 4.5 m above the floor before falling back down. Ignoring friction and air resistance, find the speed of the particle at point A.

2007-02-19 05:37:11 · 1 answers · asked by dawgs1918 1

2007-02-19 05:30:48 · 14 answers · asked by ASHERS 1

Scientists have discovered the speed of light & speed of sound. Did anyone think about SPEED OF SMELL?

2007-02-19 05:28:55 · 15 answers · asked by PearL 4

2007-02-19 05:21:47 · 7 answers · asked by Anonymous

If nothing can reach the speed of light, how does light manage to do it? I know this sounds like I'm being flippant but I'm serious. Light travels through a vacuum and can be affected by gravity so there has to be physical substance to it.

2007-02-19 05:02:59 · 6 answers · asked by Anonymous

2007-02-19 04:44:10 · 2 answers · asked by dawgs1918 1

How does the force of gravity between two object change when the distance between them is tripled?

ANOTHER QUESTION ABOUT Impulse
If a tennis ball and a bowling ball collide in midair does each undergo the same amount of impulse? explain you answer.

2007-02-19 04:42:18 · 3 answers · asked by Johnnyboy 2

according to einstein, light speed travel is not possible, but the speed necessary to escape a black hole is equal to the speed of light. So if you were to be trapped beyond the horizon of a black hole, you would in essence be traveling at the speed of light. Are these laws speculation or are they fact?

2007-02-19 04:16:16 · 6 answers · asked by Anonymous

Two small blocks A and B hav masses 0.36kg and 0.32kg respectively. Block B is stationary on an ice rink 17m from a boundary wall. Blaock A is moving at 8ms-1 at right angles to the boundry wall when it strikes B. Block A continues in the same direction, and its speed immedeiately after the collision is 2.4ms-1.

a) Given that B moves with constant retardation, and reaches the boundry wall with speed 5.6ms-1, find the coefficient of friction between B and the surface of the ice?

Block B rebounds from the wall in the reverse direction and comes to rest 4m from the wall. (you may asume that A and B do not collide again)

b) Find the change in B's Momentum as a result of its impact with the wall?

2007-02-19 04:13:45 · 2 answers · asked by Leonidus 2

Classical Mechanics

Electromagnetism

Thermodynamics

Quantum Mechanics

Relativity

AstroPhysics

Atomic, Molecular and Optical Physics

Particle Physics

Condensed matter physics

Or

Any thing Else,

2007-02-19 03:56:08 · 16 answers · asked by --> ( Charles ) <-- 4

Particles A and B, of masses 0.15kg and 0.2kg respectively, are free to move on a horizontal surface. Air resistance may be ignored. At a particular instant A is moving with speed 2ms-1 towards B, which is stationary at a point 4m from A. Particle A collides directly with particle B.

It is given instead that the coefficient of friction between A and the surface is 0.05. A is again brought to rest by the collision.

Find the speed of B immediately after the collision?

2007-02-19 03:54:46 · 2 answers · asked by Leonidus 2

1)a beacon in lighthouse is to produce a parallel beam of light. The beacon consists of bulb be placed outside the focal point, at the focal point or inside the focal point of lense? State ur reason.

2)two people who were glasses were camping. One is near sighted and the other is farsighted. Whose glasses may be useful in a starting a fire with sun rays? Give ur reasoning

3)if we read for a long time our eyes become tired. When this happen it helps to stop reading and look at distance object. From the point of view of ciliary’s muscle why does this refresh the eyes?

4)which of the following are produce final image that are virtual.1)a projector 2)a camera 3)a magnifying glass 4)eyeglasses 5)a compound microscope 6)an astronomical telescope.

2007-02-19 03:33:35 · 3 answers · asked by Anonymous

I just cant seem to understand why in the world woudl we need 2 know the surface area of cylinders, cubes, prisms, etc. Why would we need to know This In the world?

2007-02-19 03:12:25 · 5 answers · asked by Anonymous

2007-02-19 02:37:48 · 2 answers · asked by ishrat f 1

A stone is dropped from the top of a building, 2 seconds later a second stone is thrown down at a initial velocity of 25 m/s. Both stones hit the gorund at the same time. How long does it take for the first stone to hit the ground? How high is the building? What are the speeds of each stone before they hit the ground?

2007-02-19 01:58:22 · 2 answers · asked by Jineane 1

Three equal charges, each of +37uC, are spaced along a straight line. Charge A, at one end of the line is 0.55m from the central charge, charge B, and charge C is the other side of charge B a distance of 0.35m from charge B.

2007-02-19 01:48:26 · 1 answers · asked by Michael G 1

2007-02-19 01:41:45 · 4 answers · asked by howieow 1

If you are an astronaut then what will you do? For this what you have to do?

2007-02-19 01:32:35 · 2 answers · asked by karnam r 1

2007-02-19 01:12:05 · 6 answers · asked by rohitvijaysharma 1

Einstein's Mass-Energy relation.

2007-02-19 01:06:45 · 8 answers · asked by karnam r 1

Was it a real cat or was just a theoretical cat?

Y'know with the bar of plutonium experiment and that.

2007-02-19 00:43:44 · 9 answers · asked by Anonymous

other than google and yahoo search

2007-02-19 00:36:34 · 6 answers · asked by annite 2

or say your parachute didn't open or something..would it be possible to survive falling from a REALLY long way up? Also, which position would be the best to try and enter the water in? Feet first, on your back, head first?

2007-02-19 00:34:42 · 4 answers · asked by Anonymous