An object raised 5 m gains a certain amount of potential energy. If it is raised 10 m, its gain in potential energy is
A. twice as much.
B. less.
C. four times as much.
D. the same.
Answer: A
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What will be an ideal response?
A population in which the total fertility rate is 2 means that
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Condensation nuclei may be made up of salt from the ocean
a. True b. False