An object moves in a direction parallel to its length with a velocity that approaches the velocity of light. The mass of this object as measured by a stationary observer
A) approaches infinity.
B) approaches zero.
C) increases slightly.
D) does not change.
A
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Which jovian planets have compositions dominated by hydrogen compounds such as methane, ammonia, and water?
A) Uranus and Neptune B) Saturn and Uranus C) Jupiter and Neptune D) Saturn, Uranus, and Neptune E) Saturn and Neptune
Which of the following mathematical expressions should be used to calculate the momentum of an auto?
A. mass × velocity B. weight × speed C. weight × force D. mass × acceleration
An observer will measure the wavelength of waves eminating from a source that is moving away as longer than it really is.
Indicate whether the statement is true or false
A person is sitting at rest on a stool that is free to rotate about a vertical axis. The person holds in one hand a bicycle wheel that spins rapidly counterclockwise (when viewed from above). The person then stops the wheel with the other hand. What happens as a result?
A. The person rotates counterclockwise (as seen from above). B. The person rotates clockwise (as seen from above). C. Nothing. The wheel’s angular momentum is carried away by external interactions. D. Nothing. The wheel’s angular momentum is simply dissipated by the friction interaction. E. Something else happens (specify).