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20. Which of the following properties of a wave on a string most affects the speed...

20. Which of the following properties of a wave on a string most affects the speed of the wave?

A) wave amplitude

B) string tension

C) wavelength

D) wave frequency

21.Alice is twice as far from a marching band as Bob. Alice hears the marching band at _______ intensity compared to Bob.

A) one half

B) the same

C) double

D) one quarter

22. Claire runs away from a stationary loudspeaker playing music, while Dennis stands still. The frequency of sound that Claire hears from the loudspeaker is _______ the frequency that Dennis hears.

A) greater than

B) less than

C) the same as

D) depends on speed

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