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Mechanical & Non-Mechanical Waves

Which of the ...

Question

Which of the following statements regarding sound waves is correct?

A

Their speed in air is about

330

m/s

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B

These can be polarised

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C

These can travel through vacuum

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D

These have very high frequencies and small wavelengths

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Solution

The correct option is A. Their speed in air is about $330$ m/s.
The speed of sound in air is about $330 m / s$ .
As sound wave is already polarised so no need to polarise it.
Sound can't travel through vacuum.
Sound waves may have high or low frequencies and wavelengths.

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