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Question

When we clap our hands, the sound produced is best described by
(a) p=p0 sinkx-ωt

(b) p=p0 sin kx cos ωt

(c) p=p0 cos kx sin ωt

(d) p=p0n sin knx-ωnt.

Here p denotes the change in pressure from the equilibrium value.

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Solution

(d) p=p0n sin knx-ωnt.

When we clap, there is a change in pressure, which sets a disturbance and forms a wave. However, this variation is not uniform every time we clap (unlike in the case of a sound wave). Hence, we sum up all the disturbances.

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