Which terrestrial planet is about one-third the size of Earth?
A. Earth
B. Venus
C. Mars
D. Mercury
Answer: D
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The apparent weight of a fish in an elevator is greatest when the elevator
a. moves downward at constant velocity. b. moves upward at constant velocity. c. accelerates downward. d. accelerates upward. e. is not moving.
A single circular (radius = R) loop of wire is located in the yz plane with its center at the origin. The loop has a clockwise current as seen from the point (+R, 0, 0). The direction of the magnetic field at the point
A.
and at the point (+R, 0, 0) is ?
.B.
and at the point (0, +2R, 0) is ?.C.
and at the point (+R, 0, 0) is +.D.
and at the point (0, +2R, 0) is +.E.
Which of the following is a consequence of Hubble's Law?
A) The more distant a galaxy is from us, the faster it moves away from us. B) The closer a galaxy is to us, the faster it moves away from us. C) All galaxies are moving away from us equally fast. D) More distant galaxies appear younger. E) The Big Bang
Nuclear ________ explains the Sun's immense and sustained energy output
Fill in the blank(s) with correct word