Question

A source of sound is moving on a circular path with an angular speed of 4 rad/s as shown. The frequency of the source is 256 Hz. The maximum
frequency heared by a stationary observer at A is (velocity of sound in air is 332 m/s)
source
3m
observer
A
Far off
0 265 6 Hz
0 242 4 Hz
0 296 5 HZ
O 312.6 Hz​

Answer 1

Answer:

Given, (In air)

Velocity V=340m/s

Frequency f=20,000Hz

Wavelegth λ=?

V=f.λ

λ=FV=20,000340=0.017Hz

Also, Given (in Water)

Velocity, V=1480m/s

Frequencyf=20,000Hz

wavelength, λ=?

V=F.λ

λ=FV=20,0001480=0.074Hz