Question

3. Under which of these conditions does the mass of an object increase?

☐ as a spring is compressed       ☐ as chemical bonds are formed

☐ as temperature increases       ☐ all of these

4. When does relativity come close to agreeing with classical physics?

☐ under all conditions                                                 ☐ as the velocity comes close to the speed of light

☐ as the velocity comes close to zero                     ☐ never

5. According to the principle of equivalence, what is the same as being at rest in a gravitational field?

☐ Accelerating in zero gravity

☐ At rest in zero gravity

☐ At a constant velocity close to the speed of light

☐ Nothing, it is unique

Answer 1