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Effect of Temperature, Pressure and Humidity

A: intensity ...

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A: intensity of sound waves change when listener moves toward or away from the stationary source. R: relative motion between source & observer causes apparent change in frequency of sound observed

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Q. Assertion :Intensity of sound wave changes when the listener moves towards or away from the stationary source. Reason: The motion of listener causes the apparent change in wavelength.

Q. There are four possible relative motions between the source of a sound and the listener
1) source moves towards stationary listener
2) source moves away from stationary listener
3) listener moves towards stationary source
4) listener moves away from stationary source
In which of the cases, the change in frequency is the same. The magnitude of velocity of source or listener being the same.

Q. Assertion - Intensity of sound wave does not change when the listener moves towards or away from stationary.
Reason - The motion of listener causes the apparent change in wavelength.

Q. The relative motion between a source of sound and listener causing an apparent change in the frequency of perceived sound, is called:

Q. The apparent change in frequency of sound due to the relative motion between the observer and the source of sound is called:

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