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1. The kinetic energy of a particle of mass M traveling at 1/2 the speed of ligh

ID: 2276208 • Letter: 1

Question

1.  The kinetic energy of a particle of mass M traveling at 1/2 the speed of light is Mc^2/8.


2. The rest mass of a particle depends upon how fast it is moving.


3. The US is approximately 3000 mi wide as measured by people on earth. If astronauts in a space ship traveling from east to west at 45% the speed of light measure this distance, they will measure it to be more than 3000 mi wide.


4. If, in a certain reference frame, an object with no unbalanced forces on it keeps moving with constant velocity, then that frame must be an intertial reference frame.

Explanation / Answer

1.False

2.False

3.true

4.true

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