The major presence of water detected on the Moon is in
A) the puffs of steam seen coming from some still active lunar volcanoes.
B) the floors of deep craters in the polar regions, as ice deposits that never thaw.
C) faint clouds of ice in the thin lunar atmosphere.
D) the flows of mud seen on the walls of some craters.
E) the mare.
B
You might also like to view...
Polystyrene has a _________strain to fracture at room temperature relative to that of most other thermoplastic polymers.
Fill in the blank(s) with the appropriate word(s).
Two people, each of 70 kg mass, are riding in an elevator. One is standing on the floor. The other is hanging on a rope suspended from the ceiling. Compare the acceleration 
of the first person to the acceleration 
of the second person. Which statement is correct?
A.
B.
C.
is greater than , but they have the same direction.D.
is greater than , but they have opposite directions.E.
is less than , but they have the same direction.A rocket taking off straight upward develops a thrust of 10,000 newtons. The rocket weighs 2,000 newtons. The net force on the rocket, neglecting air resistance, is
A) 8,000 newtons. B) 2,000 newtons. C) zero. D) 12, 000 newtons. E) 10,000 newtons.
During each cycle, the compressor in a certain ideal Carnot refrigerator performs 480 J of work to remove 150 J of heat from the interior of the refrigerator. How much heat do the coils behind the refrigerator discharge into the kitchen each cycle?
A) 110 J B) 150 J C) 330 J D) 480 J E) 630 J