If you do an experiment on Earth, and then do an identical experiment in a jet plane moving uniformly at a high speed, you get identical results from both experiments. This is an example of

a. time dilation.
b. length contraction.
c. the equivalence of mass and energy.
d. the principle of relativity.
e. none of the above.


d

Physics & Space Science

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Mercury's major atmospheric gas is

a. oxygen. b. hydrogen. c. carbon dioxide. d. Misleading; the atmosphere is virtually nonexistent.

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When a gas in a container expands to twice its volume, its density

A) halves. B) doubles. C) quadruples. D) remains the same.

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What happens to the surface temperature and luminosity when gravity first assembles a protostar from a collapsing cloud?

A) Its surface temperature and luminosity increase. B) Its surface temperature remains the same and its luminosity decreases. C) Its surface temperature and luminosity decrease. D) Its surface temperature decreases and its luminosity increases. E) Its surface temperature and luminosity remain the same.

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Which of the following objects would be found on the Moon's surface?

A) sedimentary rocks B) meteoroids C) meteors D) meteorites E) asteroids

Physics & Space Science