Why does sound travel faster in moist humid air than in dry air?

Type: MCQ • Marks: 1

A. Humidity increases air pressure

B. Water vapor molecules are lighter than diatomic oxygen and nitrogen molecules, reducing humid air density

C. Water is a solid

D. Moisture freezes sound

Explanation

Lower molar mass of water vapor decreases density, increasing acoustic wave velocity.

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Class 9th Science (MCQ)

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