RELATIVITY

1.If you were in spaceship traveling at the speed close to the speed of light (with respect to the earth) you would notice that___________

• your pulse rate is different than normal

• your mass is different than normal

• some of your physical dimensions were smaller than the normal

• none of these effects occur

2. Which of the following is not a consequence of Einstein’s relativity?

• Simultaneity

• Time Dilation

• Length Contraction

• Mass decrese

3. An object of rest mass of 1kg moving at 99.5% of the speed of light. What is its measured mass?

• 10 kg

• 1.5 kg

• 0.1 kg

• 0.15 kg

4. A spaceship approaching an asteroid at a speed of 0.6 c launches a scout rocket with the speed of 0.4c. At what speed is the scout rocket approaching the asteroid?

• 0.76 c

• 0.96 c

• 1.00 c

• 0.81 c

5. Will observers A and B agree on measurements of time if A moves at half the speed of light relative to B?

• Observers A and B will agree on the measurement of time and see each other’s time as passing normally.

• Observers A and B will not agree on measurement of time.

• Observer B will observe the slowing of time in his frame of reference.

• No enough data for comparison.

6. In relativistic point of view, what happen to mass as velocity increases?

• mass increases

• mass decreases

• mass does not change

• mass decrease first and then increase

7. He devised a theory that reconcile the discrepancies between mechanics and electromagnetism.

• Isaac Newton

• Albert Einstein

• James Clerk Maxwell

• Michelson and Morley

8. The starship Enterprise makes a long trip into space, traveling at a speed of 0.80c relative to the earth. The trip takes 20 years according to a shipboard clock. How many years elapse on earth during the voyage?

• 21 years

• 19 years

• 20 years

• 20.5 years

9. Which of the following is not a prediction of general theory of relativity?

• Passage of time

• action-reaction forces

• Geometry of space

• Propagation of light

What does it implies when the relativistic speed approaches the speed of light?

• Newton’s definition of momentum is valid 

• the momentum approaches infinity.

• the momentum decreases dramatically.

• the momentum is became equal to the mass of the object.