If a twin goes on a trip in a high speed rocket ship, when she returns home she will be younger than her twin sister who did not go on the trip because of
a. time dilation
b. length contraction
c. the equivalence of mass and energy
d. the principle of relativity
e. none of the above
A
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The modified form of Kepler's Third law allows astronomers to determine the Milky Way's ________.
A. shape B. composition C. number of spiral arms D. mass E. age
Spectral lines are often referred to as the stars' "fingerprints" because:
A) fingerprints also consist of individual lines that make a pattern. B) both are unique to their source. C) both can be easily categorized. D) both are characteristic of the individual that produced them. E) All of these are correct.
What are the eight major plates according to the theory of plate tectonics?
What will be an ideal response?
If the velocity of a non-relativistic object is doubled, its energy is quadrupled. This is strictly true only for very low velocities. At what velocity is it the case that a doubling of velocity results in a doubling of energy?
A. 0.45c B. 0.33c C. 0.11c D. 0.20c E. 0.50c