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.
Question 2
If you are located in the Northern Hemisphere, which of the following correctly describes a relationship between the sky and your location?
A) The altitude of the north celestial pole equals your latitude.
B) The altitude of the celestial equator equals your latitude.
C) The altitude of the north celestial pole equals your longitude.
D) The longitude of the north celestial pole is circumpolar, and therefore crosses your zenith at the meridian.
Three principle forms of natural selection: (a) stabilizing selection, (b) directional selection, an
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