We are actually looking into the past when we look at
A. a distant star.
B. our physics book.
C. actually, both of these
D. none of these
Answer: C
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Why would a box on a shelf have a higher potential energy than that of a box on a lower shelf?
A) The box on the higher shelf is heavier B) The box on the lower shelf was placed there after the higher box. C) The box on the higher shelf experiences less gravitational pull; with less gravitational pull comes more weight, thus more potential energy. D) It took more work to move the box to the high shelf than to the low shelf
The removal of existing dams is motivated by
A) the need for more urban drinking water. B) the need for more irrigation water. C) restoration of scenic beauty of rivers and fisheries. D) the need for more hydroelectric power stations.
An anticyclone contributed to the crash of John F. Kennedy, Jr.'s plane
Indicate whether the statement is true or false
Winds near upper-atmospheric ridges
A) slow, converge, and descend, creating surface high pressure. B) accelerate and diverge, creating surface low pressure. C) converge aloft, creating convergence at the surface, as well. D) diverge aloft, creating divergence at the surface, as well. E) converge, but have no influence on surface circulation, which may either converge or diverge.