Question

A body is vibrating $6000$, times in $1$ minute. If the velocity of sound in air is $360m/s$, find wavelength of sound in meter.

Answer 1

$Frequency=\nu =\frac{\text{Number of vibrations}}{\text{Number of seconds}}=\frac{6000}{60}=100Hz$

$Velocity=v=360m/s$

Let wavelength be $\lambda$

$v=\nu \times \lambda$

$360=100\times \lambda$

$\lambda =3.6m$

Hence the wavelength of sound $=3.6m$