The number of daylight hours before 12 noon is ______________ the number of daylight hours past 12 noon
a. greater than
b. less than
c. approximately the same as
c
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Two identical objects, one light colored and the other dark colored, are at the same cool temperature. Then, you place them outside, on a warm day, in direct sunlight. Which object will warm up faster?
A. The dark one B. Both warm up at the same rate C. The light one D. As strange as it seems, neither object will ever warm up because energy conservation prevents the addition of energy
A newly formed planet or large asteroid becomes molten due to
a. the last infalling objects. b. decay of radioactive element isotopes. c. the last infalling objects and decay of radioactive element isotopes. d. none of the other choices as newly formed planets remain solid inside.
A person is lowering a bucket into a well with a constant speed. The force exerted by the rope on the bucket is
A) equal to the bucket's weight. B) greater than the bucket's weight. C) less than the bucket's weight, but not zero N. D) zero N. E) Cannot be determined without additional information.
You see two main-sequence stars with the same spectral type. Star 1 is dimmer in apparent brightness than Star 2 by a factor of 100. What can you conclude, assuming there is no absorption of either star's light by interstellar gas or dust?
A) Without first knowing the distances to these stars, you cannot draw any conclusions about how their true luminosities compare to each other. B) The luminosity of Star 1 is a factor of 100 less than the luminosity of Star 2. C) Star 1 is 10 times more distant than Star 2. D) Star 1 is 100 times more distant than Star 2. E) Star 1 is 100 times nearer than Star 2.