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Question

In a longitudinal wave, a compression is a region of ____________.

A
low density
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B
high density
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C
low pressure
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D
no pressure
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Solution

The correct option is B high density
Longitudinal waves propagate in the form of compressions and rarefactions through a medium.
A compression is a region where the particles of the medium are tightly packed together. So, it is a region of high density, and high pressure.
A rarefaction, on the other hand, is a region where the particles of the medium are spread wider. So, it is a region of low density, and low pressure.


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