The equivalence principle says that a person in an elevator that is in freefall feels the same acceleration as

A) a person in an elevator going up with an acceleration of g.
B) a person in space, far from any gravitational source accelerating at g.
C) a person in an elevator going down with an acceleration of g.
D) a person in space, far away from any gravitational source with no acceleration.
E) a person in orbit of Earth accelerating at g upward.


B

Physics & Space Science

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Fill in the blank(s) with the appropriate word(s).

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Emperor penguins are part of the species forsteri and genus aptenodytes. Given this, their scientific classification would be written

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Physics & Space Science

Gamma rays are

A) made up of helium nuclei. B) made up of electrons. C) a form of beta radiation. D) rays of light. E) a form of electromagnetic radiation.

Physics & Space Science