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Chapter 26: Special Theory Of Relativity Quiz14

Chapter 26: Special Theory Of Relativity Quiz14

Chapter 26: Special Theory Of Relativity

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Quiz Questions And Answers

An object moves in a direction parallel to its length with a velocity that approaches the velocity of light. The length of this object, as measured by a stationary observer,

Approaches zero.
Increases slightly.
Does not change.

As the speed of a particle approaches the speed of light, the mass of the particle

Increases.
Remains the same.
Approaches zero.

As the speed of a particle approaches the speed of light, the momentum of the particle

Increases.
Remains the same.
Approaches zero.

A spear is thrown by you at a very high speed. As it passes, you measure its length at one half its normal length. From this measurement, you conclude that the moving spear's mass

One-half its rest mass.
Twice its rest mass.
Four times its rest mass.

What happens to the kinetic energy of a speedy proton when its relativistic mass doubles?

It more than doubles.
It less than doubles.
It must increase, but it is impossible to say by how much.

What happens to the total relativistic energy of a speedy proton when its relativistic mass doubles?

It doubles.
It more than doubles.
It less than doubles.

Which of the following depends on the observer's frame of reference?

The length of a meter stick
The half-life of a muon
All of the given answers

As the velocity of your spaceship increases, you would observe

That your mass has increased.
All of the given answers
None of the given answers

A boat can travel 4.0 m/s in still water. With what speed, relative to the shore, does it move in a river that is flowing at 1.0 m/s if the boat is heading upstream?

3.0 m/s
4.8 m/s
5.0 m/s

A boat can travel 4.0 m/s in still water. With what speed, relative to the shore, does it move in a river that is flowing at 1.0 m/s if the boat is heading downstream?

4.1 m/s
4.8 m/s
5.0 m/s
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