What happens to velocity of sound if water vapour content in air is decreased?
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As moist will decrease the density of air particles(water vapor is lighter than diatomic Oxygen (32 units) and diatomic Nitrogen (28 units) at constant temperature and pressure. so the speed of sound will increase. Hence the sound will travel faster in moist air than the dry air.
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Answer :As water vapour content decreases, density of air increases. So, velocity of sound decreases
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