What is true of the lunar highlands?
A) They are less heavily cratered than the mare.
B) They are the darker regions of the Moon seen with the naked eye.
C) They are found on the Moon's northern hemisphere.
D) They are younger than the darker mare.
E) They are the oldest part of the lunar surface.
E
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A circus performer stretches a tightrope between two towers. He strikes one end of the rope and sends a wave along it toward the other tower. He notes that it takes 0.8 s for the wave to travel the 20 m to the opposite tower. If one meter of the rope has a mass of 0.35 kg, find the tension in the tightrope.
What will be an ideal response?
If the distance between us and a star is doubled, its apparent brightness will decrease by a factor of four
Indicate whether the statement is true or false
If a foreign atom is more than _____________% larger than its host, it normally does not form a continuous substitutional solid solution.
Fill in the blank(s) with the appropriate word(s).
Compared to a bar of pure gold, the density of a pure gold ring is
A) less. B) the same. C) slightly more. D) much more.