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[Post New]22 Dec 2006 21:53:05 IST
    Subject: wave motion
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bubun (68)

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Velocity of sound is sqrt(elastic modulos/density) . Molecular mass of dry air is 28.8 and that of water vapour is 18 . So moist air has MM >18 and <28.8 . So its density is less and hence velocity of sound is more in moist air
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