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When a sound wave moves past a point in air, what happens to the density of air at this point?
1. The density of air increases and then decreases as the sound wave passes.
2. The air is compressed after the sound wave passes.
3. There is no air after the sound wave passes.
4. There is no change in the density of air.

Respuesta :

Answer:

1. The density of air increases and then decreases as the sound wave passes.

Explanation:

A sound wave is a longitudinal wave that travels through a medium by compression and expansion of the medium. Air is a compressible fluid, that means with enough pressure the density of fluid can change. So, when sound is traveling through air the air gets compressed then expands to its original form. When air gets compressed the density increases. Hence when a sound wave moves through air, the density of air increases and then decreases as the sound wave passes.

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