A person standing on one side of a road blows a whistle which has a frequency of `600 Hz`. A cyclist passes at 16 kilometre per hour. What does the frequency of the whistle appear to be to the cyclist before and after passing ?
(Velocity of sound in air `= 350 ms^(-1)`)

A policeman blows a whistle with a frequency of 500 Hz.A car approaches him with a velocity of 15 ms^(-1) .Calculate the change in frequency as heard by the driver of the car as he passes the policeman.Speed of sound in air is 300 ms^(-1) .

A policeman blos a whistle of frequency 400Hz as a car speeds past him with a velocity of 54km h^(-1) . Find the cahnge in frequency as heard by the driver of the car just as he passes the policeman. Velocity of sound in air is 350ms^(-1)

A policemen blows a whistle of frequency 330 Hz as a car speeds and passed him with avelocity 18 km per hour. Find the change in frequency as heard by the driver of the car just as he passes the police man (Velocity of sound = 320 m//s)

A train standing at the outer signal of a railway station blows a whistle of frequency 400Hz in still air. The train begins to move with a speed of 10ms^(-1) towards the platform. What is the frequency of the sound for an observer standing on the platform ? (sound velocity in air =330ms^(-1))

Two aeroplanes 'A' and 'B' are moving away from one another with a speed of 720kmph . The frequency of the whistle emitted by 'A' is 1100Hz . The apparent frequency of the whistle as heard by the passenger of the aeroplane 'B' is (velocity of sound in air is 350ms^(-1) ).

A trian standing at the outer signal of a railway station belows a whistle of frequency 400 Hz still air. The train begins to move with a speed of 10ms^(-1) towards the platform. What is the frequecncy of the sound for and obeserver standing on the platform? (sound velocity in air 330 ms^(-1))

A train, standing at the outer signal of a railway station blows a whistle of frequency 400Hz in still air. (i) What is the frequency of the whistle for a platform observer when the train (a) approaches the platform with a speed of 10ms^(-1) , (b) receds fromk the platform with a speed of 10ms^(-1) ? (ii) What is the speed of sound in each case ? The speed of sound in still air can be taken as 340ms^(-1)

A train standing at the outer signal of a railway station blows a whistle of frequency 400 Hz in still air. The train begins to move with a speed of 30 m s^(- 1) towards the platform. The frequency of the sound heard by an observer standing on the platform is (Speed of sound in air = 330 m s^(-1) )