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 police woman blows a whistle of frequency 500 Hz. A car speeds past her with a velocity of 72 kmh^(-1). Find the charge in frequency heard by the driver of the car just as he passes the police woman. Velocity of sound = 350 ms^(-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 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) 25 Hz b) 50 Hz c) 100 Hz d) 150 Hz

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) .

An engine blowing a whistle of frequency 133 Hz moves with a velocity of 60 ms^(-1) owards a hill from which an echo is heard. The frequency of the echo heard by the driver (Velocity of sound in air=340 ms^(-1) )

A car B, with a hom of frequency 700 Hz moves with a velocity 90 kmh^(-1). It approaches another car A, coming towards it with a velocity 72 kmh^(-1). Calculate the apparent frequency of the sound heard by the driver in the car A (a) before crossing (b) after crossing ? Velocity of sound =350 ms^(-1) .

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))

A man is travelling in a train towards the station with a speed of 50 m/s. calculate the apparent frequency heard by him of whistle which is blown at the station with a frequency 200 Hz. Velocity of sound in air is 350 m/s.

A man is travelling in a train towards the station with a speed of 50 m/s. calculate the apparent frequency heard by him of whistle which is blown at the station with a frequency 200 Hz. Velocity of sound in air is 350 m/s.