On a scale in which the distance from Earth to the Sun is about 15 meters, the distance from Earth to the Moon is ________
A) about 30 meters B) small enough to fit within your hand
C) about 1 meter D) about 5 meters
B
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Two children are riding on a merry-go-round. Child A is at a greater distance from the axis of rotation than child B. Which child has the larger tangential acceleration?
A) Child A B) Child B C) They have the same zero centripetal acceleration. D) They have the same non-zero centripetal acceleration. E) There is not enough information given to answer the question.
As a high-altitude balloon sinks lower into the atmosphere, it undergoes a decrease in
A) volume. B) density. C) weight. D) mass. E) none of the above
Sharon cycles up a hill at 15 km/h. When she reaches the top, she immediately turns around and comes down the same road at 30 km/h, stopping where she'd started. Is her average speed greater than, less than, or equal to 22.5 km/h? Explain
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A beam of light (f = 5 × 1014 Hz) enters a piece of glass (n = 1.5). What is the frequency of the light while it is in the glass?
A) 5 × 1014 Hz B) 7.5 × 1014 Hz C) 3.33 × 1014 Hz D) 5 × 1013 Hz E) 7.5 × 1013 Hz