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Question


Sound waves are a sequence of __ and rarefactions.

A
compression
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B
reflections
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C
refractions
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D
collisions
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Solution

The correct option is A compression

Sound waves are a sequence of compressions and rarefactions. A compression is a region in a longitudinal wave where the particles are closest together. A rarefaction is a region in a longitudinal wave where the particles are farthest apart.

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