Suppose that a sound source is emitting waves uniformly in all directions. If you move to a point twice as far away from the source, the frequency of the sound will be

A) unchanged. B) twice as great.
C) half as great. D) one-fourth as great.


A

Physics & Space Science

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Consider the star to which the arrow points. How is it currently generating energy?

A) by core hydrogen fusion B) by hydrogen shell burning around an inert helium core C) by gravitational contraction D) by core helium fusion combined with hydrogen shell burning E) by both hydrogen and helium shell burning around an inert carbon core

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The strong force is to gluons as the gravitational force is to

A) Z particles. B) quarks. C) photons. D) gravitons. E) neutrinos.

Physics & Space Science

Which of the following web video formats is platform-independent?

A. .avi B. .mov C. .mpeg D. .wmv

Physics & Space Science

Which has zero acceleration? An object

A) at rest. B) moving at constant velocity. C) in mechanical equilibrium. D) all of the above E) none of the above

Physics & Space Science