A source of sound is movig with a speed 220 `m(s)^-1` towards a stationary target.While moving,it emits a wave of frequency 1000 Hz.Some of the sound reaching the target get reflected back to the source as echo.Calculate the (i)frequency of sound as detected by the target and (ii)the frequency of echo as detected by the source?

An echo was heard after 3s. What is the distance of the reflecting surface from the source, given that the speed of sound is 342 ms^-1 ?

An ambulance blowing a siren of frequency 700 Hz is travelling towards a wall with a speed 2 m(s)^-1.Calculate the number of beats heard in one second by the driver of the ambulance.(velocity of sound = 350 m(s)^-1 )

A siren is fitted on a car going towards a vertical wall at a speed of 36 kmh^(-1) . A person standing on the ground behind the car, listeners to the siren sound coming directly from the source as well as that coming after reflection from the wall. Calculate the apparant frequencies of both the sounds. Velocity of sound 340ms^(-1) , frequency of the siren 500Hz.

Dudecue an expression for apparent frequency of sound,when the listener moves towards a stationary source.

A train approaching a hill at a speed of 1 Km a minute blows a whistle of frequency 480 Hz.Calculate the frequency which will be recorded byan instrument on the top of the hill.[Velocity of sound = 330 m/s]

A source of sound of frequency 500 Hz is moving towards an observer with velocity 30 m/s.The speed of the sound id 330 m/s.The frequency heard by the observer is

Calculate the wavelength of a sound wave whose frequency is 220 Hz and speed is 440m/s in a given medium'.

A stationary sound wave has a frequency 165 Hz.Distance between two consecutive nodes is(speed of the sound in air = 330 m/s)

A train whistling while approaching a railway platform with a speed of 90 km(s)^-1 .The frequency of sound of the whistle is 600 Hz.If the velocity of sound in air is 325 m(s)^-1 ,calculate the apparent frequency of the sound of the whistle as heard by an observer standing on the platform.

A frequency of the horn of a car drops from 280 Hz to 240 hz as the car passes a stationary observer.What is the speed of the car?[velocity of the sound in the air is 330 m(s)^-1].