An object is propelled along a straight-line path in space by a force. If the mass of the object somehow becomes twice as much, its acceleration
A) quadruples.
B) doubles.
C) stays the same.
D) halves.
E) none of the above
D
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A swim bladder is found in
A. sharks. B. whales. C. penguins. D. ray-finned fishes.
What does a profile of a river from its headwaters to its mouth typically show?
A) An increase in gradient downstream B) A straight-line profile reflecting a constant decrease in gradient C) An abrupt increase followed by a gradual decrease D) A curved shape that flattens out downstream E) None of these are correct.
Faults that show a combination of dip-slip and strike-slip movement are
A) reverse faults. B) strike-dip faults. C) oblique-slip faults. D) diagonal-strike faults.
The Department of Energy is investing $60 billion in rural parts of the United States, largely in the Great Plains, in order to develop what alternative source of energy?
A) Biofuels B) Solar power C) Wind D) Hydroelectric