Equation of sound wave in air is given by \Delta P = 0.02\sin[300t - (9.0)x]. Find the speed of sound in air.

 

Answers (1)

Compare with general equation

\Delta p = \Delta p_{max} sin \left [ \omega \left ( t - \frac{x}{v} \right ) \right ]

\omega = 3000

\gamma = \frac{\omega }{x} = \frac{3000}{9} = \frac{1000}{3} m/s

 

Pressure Waves -

\Delta P= -\Delta P_{max}\cdot \cos \left ( Kx-\omega t \right )
 

- wherein

\Delta P_{max} = Maximum variation in pressure

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