Approximately when does a third-quarter moon rise?
A) sunset
B) noon
C) midnight
D) sunrise
C) midnight
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Two balls, one of radius R and mass M, the other of radius 2R and mass 8M, roll down an incline. They start together from rest at the top of the incline. Which one will reach the bottom of the incline first?
A) The small sphere B) Both reach the bottom together. C) The large sphere D) It depends on the height of the incline. E) It depends on the length of the inclined surface.
When a funnel cloud touches the ground, it becomes a
A) hurricane. B) thunderstorm. C) tornado. D) cyclone.
What is the inductance for an inductor with a reactance of 20
at a frequency of 60 Hz?
A. 12 H B. 19 H C. 3.0 H D. 53 mH E. 27 mH
Red dwarfs:
A) lie in the upper left of the Hertzsprung-Russell diagram. B) are the biggest stars in the main sequence. C) are cool and small with low luminosities. D) appear 1000 times larger than the Sun.