The equivalence principle says that a person in an elevator that is in free fall 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
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A temperature change of 20 C° corresponds to a temperature change of
A) 68. F°. B) 11.1 F°. C) 36. F°. D) 42. F°. E) 20. F°.
Suppose that the gravitational force by Earth on the moon suddenly shut off. How would the moon then move?
A) It would go into a larger circular orbit. B) It would move straight ahead in a straight line, at constant speed. C) It would move directly outward, away from Earth. D) It would slow down and stop. E) It would move directly inward, toward Earth.
Electrons orbiting the nucleus of an atom are grouped into energy bands known as
a. tracks. b. slots. c. shells. d. tunnels.
After three half-lives, 3/4 of the nuclei in a sample of a radioisotope have decayed
a. True b. False Indicate whether the statement is true or false