Question

name 2 quantities that vary periodically at a place in air as a sound wave travels through it

Answer 1

Hey friend, Harish here

Here is your answer.

The two quantities that varies periodically at a place in air when a sound wave travels through it are :

i) Compression.

ii) Rarefaction.

Because the vibration of molecules in air is not constant throughout.
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Answer 2

The series of compression and rarefaction vary periodically at place in air as sound travel through it. Compression is the region where the density as well as pressure of the air is very high. Rarefaction is the region where the density as well as the pressure is very low.

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