A motorcyclist going around a circular track of radius `50 m` with a speed of `25 m//s`, is at point `X`. A static siren at `Y` is emitting sound of frequency `n`. How many times (approximately)in an hour will the motor cyclist hear the sound of actual frequency `Y` ?

A source of sound of frequency 256 Hz is rotating in a circle of radius 3 m with angular speed of 20 rad/s. A listener is standing at rest along the line of centre of the circle. Under which position of the source of sound the listener will hear sound of (a) maximum frequency (b) minimum frequency (c) same frequency as the frequency of source.

A siren emitting sound of frequency 500 Hz is going away from a static listener with a speed of 50 m / sec . The frequency of sound to be heard, directly from the siren, is

A bat flies perpendicularly towards a wall with a speed of 6 m/s, emitting sound of frequency 450 kHz. What is the frequency of the wave reflected from the wall that it will hear? Given c=340m//s ?

An observer is moving with a constant speed of 20m/s on a circular track of radius 50m. A source kept at centre of track emits a sound of frequency 200 Hz. Then the frequency received by the observer is x xx10^2 Hz, what is value of x. (V= 340m/s)

A bat flies perpendicularly towards a wall with a speed of 6 m/s, emitting sound of frequency 450 kHz. What is the frequency of the wave reflected from the wall that it will hear? Given c=340(m)/(s) ?