Velocity of sound in vacuum is .... $ms^{-1}$

Sound waves of wavelength greater than that of audible sound are called

Derive the expression for the speed of a sound wave and obtain the equations for the speed of sound in different media.

Sound velocity is maximum in

The pressure wave,$P = 0.01 \sin(1000t - 3x) \, N m^{-2}$,corresponds to the sound produced by a vibrating blade on a day when atmospheric temperature is $0 \, ^oC$. On some other day when temperature is $T$,the speed of sound produced by the same blade and at the same frequency is found to be $336 \, m s^{-1}$. The approximate value of $T$ is .... $^oC$

The intensity of sound increases at night due to