The peaks in the following graph could refer to a:
(More than one answer is correct)
A
crest
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B
trough
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C
compression
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D
rarefaction
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Solution
The correct options are A crest C compression A crest is the part which looks like a mountain peak. It's also called a compression in the case of a sound wave.
A trough is the part which looks like a valley (V). It's also called a rarefaction.