MHT CET 2026 Physics question

What is the effect of humidity on sound waves when humidity increases?

(A)Speed of sound waves is moreCorrect
(B)Speed of sound waves is less
(C)Speed of sound waves remains same
(D)Speed of sound waves becomes zero

Answer: (A)

Solution

The speed of sound in a gas is . Moist air contains water vapour (molar mass 18 g/mol) in place of some of the heavier nitrogen and oxygen molecules (average molar mass about 29 g/mol), so humid air is less dense than dry air at the same pressure and temperature.

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Question ID VK-096204