A train stands at a platform blowing a whistle of frequency 400Hz in still air. What is the frequency of the whistle heard by a man running (a) towards the engine at `10ms^(-1)` (b) away from the engine at `10m//s` ?
What is the wavelength of sound received by the running man in each case ?

An engine standing at the platform blows a whistle of frequency 305 Hz. If the velocity of sound be 1220 km/h, the frequency of the whistle as heard by a man running towards the engine with a speed of 20 km/s is

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 bus standing at a bus stand blows a horn 300 Hz in still air. The speed of sound in still air = 340 m/s. Determine : (i) the frequency of the horn heard by a man running away fro the bus at 8 m/s and speed of sound in this case. (ii) wavelength of sound received by the man.

A train is moving with speed 72 km/h towards a hill blows a whistle of frequency 1240Hz. the frequency of echo heard by driver is(speed of sound=330m/s)

A train, standing in a stationyard, blows a whistle of frequency 400Hz in still air. The wind starts blowing in the direction from the yeard to the station at a speed of 10ms^(-1) . What are the frequency, wavelength, and speed of sound for an observer standing on the station's platform ? Is the situation exactly identical to the case when the air is still and the observer runs towards the yeard at a speed of 10ms^(-1) ? Th speed of sound in still air can be taken as 340ms^(-1) .

A train is approaching towards a platform with a speed of 10 ms^(-1) , while blowing a whistle of frequency 340 Hz. What is the frequency of whistle heard by a stationary observer on the platform ? (given, speed of sound =340 ms^(-1) )

A man sitting in a moving train hears the whistle of the engine. The frequency of the whistle is 600 Hz

A train, standin in a station yard, blows a whistle of frequency 400Hz in still air. The wind starts blowing in the direction from the yard to the station with a speed of 10m//s. Given that the speed sound ini still air is 34om//s,

A person is standing on a railway platform.An engine blowing a whistle of frequency 640 Hz approaches him with a speed of 72 km /hr,The frequency of the note heard by the person is (velocity of sound is 340 m/s )

A train is travelling at 120kmph and blows a whistle of frequency 1000Hz . The frequency of the note heard by a stationary observer if the train is approaching him and moving away from him are (Velocity of sound in air =330=ms^(-1) )