what is the effect of humidity on the velocity of sound in air?
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https://www.meritnation.com/ask-answer/question/what-is-the-effect-of-density-humidity-pressure-temper/waves/7183575
https://www.meritnation.com/ask-answer/question/what-is-the-effect-of-density-humidity-pressure-temper/waves/7183575