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Sounds waves travel at 350m//s through a...

Sounds waves travel at `350m//s` through a warm air and at `3500m//s` through brass. The wavelength of a `700 Hz`. Acoustic wave as it enters brass from warm air

A

Decreases by a factor 20

B

Decreases by a factor 10

C

Increases by a factor 20

D

Increases by a factor 10

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The correct Answer is:
D
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