For lunar tides to occur in the human body,
A) most of the body would have to be in the liquid state.
B) Earth's gravitation would have to be incredibly small.
C) parts of the body would have to be appreciably closer to the Moon than other parts.
D) the body would have to be female, as evidenced by women's monthly menstrual cycles.
E) none of these
Answer: C
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A stone is thrown from the top of a building with an initial velocity of 20 m/s downward. The top of the building is 60 m above the ground. How much time elapses between the instant of release and the instant of impact with the ground?
a. 2.0 s b. 6.1 s c. 3.5 s d. 1.6 s e. 1.0 s
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A lens of focal length 10 cm is placed in contact with a lens of focal length -15 cm. What is the focal length of the combination?
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