Physicshard · Past Paper
The speed of sound is faster on a humid day than on a dry day because humid air is what?
ADenser than dry air
BLess dense than dry air
CHeavier than dry air
DColder than dry air
✓ Correct Answer: B — Less dense than dry air
Humid air contains water vapor, which is less dense than the nitrogen and oxygen it replaces, and sound travels faster in less dense gases.
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