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The equation of a sound wave in air is given by
p - (001 N/m ) sin[(1000 s )t- (30 m)x)
(a) Find the frequency, wavelength and the speed of
sound wave in air. (b) If the equilibrium pressure of air
is 1.0 x 10° N/m?, what are the maximum and minimum
pressures at a point as the wave passes through that
point?

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