How do the following factors affect the speed of sound in air :
(i) frequency of sound
(ii) Pressure of air ?
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No effect
Explanation:
(i) The frequency of the sound wave does not affect the speed of sound. An increase in wave frequency will cause the wavelength to decrease, but the wave speed will remain constant. So there is no effect.
(ii) Air pressure has no effect on speed of sound in an ideal gas because pressure and density both contribute to sound velocity equally, the two effects cancel each other out. In an ideal gas, regardless of pressure, intermolecular gap is very large.
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