The time for the Moon to repeat its cycle of phases is equal to
a. its sidereal period.
b. one day.
c. one hour.
d. one year.
e. its synodic period.
e
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A cube at 100.0°C radiates heat at a rate of 80.0 J/s. If the length of each side is cut in half, the rate at which it will now radiate is closest to
A) 56.6 J/s. B) 40.0 J/s. C) 28.3 J/s. D) 20.0 J/s. E) 10.0 J/s.
A 0.28-kg stone you throw rises 34.3 m in the air. The impulse your hand receives from the stone while it throws the stone is
a. 2.7 N s, up. b. 2.7 N s, down. c. 7.3 N s, up. d. 7.3 N s, down. e. 9.6 N s, up.
A woman who weighs 500 N stands on an 8.0 m long board that weighs 100 N. The board is supported at each end. The support force at the right end is 2 times the support force at the left end. How far from the right end is the woman standing?
a. 4.0 m c. 2.7 m b. 2.4 m d. 1.6 m
Shallow-sloped shield volcanoes are made from lava that
A) is as runny as liquid water. B) has a medium viscosity. C) has a high viscosity. D) can have any viscosity.