Question

1. An object is vibrating 4200 times a minute. IF the velocity of sound is 330 m/s, calculate,

a)the frequency of vibration in hertz, b) the wavelength of the wave produced.

Answer 1

$$\begin{gathered} 4200timesin60seconds \\ frequency=\frac{4200}{60}=70Hz \\ wavelength=velcotiy/frequency=330/70=33/7m/s \end{gathered}$$