A progressive sound wave of frequency 500 Hz is travelling with a speed of 350ms^−1. A compression maximum appears at a place at a given instant. The minimum time interval after which the rarefaction maximum occurs at the same point is.

in a previous question the minimum distance between a centre of compression and a centre of rarefaction at any instant is

Which parts of the curve in the figure shown represent compression and rarefaction for a longitudinal wave ?

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If velocity of sound in a gas is 360 m / s and the distance between a compression and the nearest rarefaction is 1 m , then the frequency of sound is