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OpenStudy (anonymous):
What is the least dense part of a sound wave? A. peak B. rarefaction C. trough D. compression :/
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OpenStudy (michele_laino):
by definition, it is rarefaction, since the air pressure has its minimum value
OpenStudy (anonymous):
oohh okay!! thanks!! :D
OpenStudy (michele_laino):
thanks!! :)
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