Which example best illustrates potential energy?
A. the wind blowing
B. water in a stream
C. steam
D. a car at the top of a hill
E. electricity
Answer: D
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Before ice forms on a lake, all the water in the lake must be cooled to
A. 4°C. B. a value slightly below 0°C. C. 0°C. D. indeterminate
Under which of the following conditions do hurricanes dissipate?
A. when they move over land B. when upper-level outflow of air exceeds surface inflow of air C. when they move over warm water D. when they move into a region of weak vertical wind shear
Under what conditions do carbonates form? What will be an ideal response?
Measured variations in the Sun's emission of radiation and observed changes in the earth's climate:
A) are well understood. B) happen on a 22-year cycle. C) happen on an 11-year cycle. D) have not been clearly linked.