Sound waves are a sequence of compressions and _________ .

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Sound waves are a sequence of compressions and _________ .

Options:

A . amplitudes

B . wavelengths

C . rarefactions

D . pitch

Answer: Option C
:
C
Sound waves are a sequence of compressions and rarefactions. A compression is a region in a longitudinal wave where the particles are closer than normal. A rarefaction is a region in a longitudinal wave where the particles are farther than normal.

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