**(a) Frequency of vibration in hertz **

Given,

Number of vibration in one minute = 6000

Number of vibrations in one sec = 6000/ 60 =100Hz

Therefore, Frequency, f = 100 Hz

**(b) Wavelength of the wave produced **

Given,

Velocity of speed in air, v = 360 ms^{–1 }

Frequency, f = 100 Hz

Wavelength, λ = ? v = f λ ⇒ λ= 360 ms^{−1}/ 100s^{−1} = 3.6m

The wavelength of the wave is 3.6 m