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What's fog? Fog is caused by the condensation of water molecules in air. This leads to the increase in the density in air. So, the layman answer can be: Velocity of sound is greater in Denser materials, so during fog velocity of sound is greater. Mathematicaly: v2=Bulk modulus/density

=stress/strain*density

we can say stress due to sound wave normally and in fog is constant.

Therefore, v2 is inversely proportional to strain*density.

during fog this value is less than normal, that's why velocity of sound wave in fog is greater.

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โˆ™ 2007-10-18 20:09:37
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Q: Why does sound carry better in the fog?
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