Mercury's crust
A. is much thicker than Earth's or Venus's.
B. is molten because it is so close to the Sun.
C. has an unusually high concentration of silicate rocks.
D. may have been mostly lost after a collision with a large planetesimal.
Answer: D
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The light-gathering power of a telescope is directly proportional to
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Using the velocity transformation formula, calculate the speed in the "rest frame" of a particle which is seen to be moving at c in a "moving frame"
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For which of the following reasons is production of ethanol unwise?
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