A tuning moving towards a tunnel in a huge mountain with a speed of `12 m//s` sounds its whistle. Sound is reflected from the mountain. If the driver hears `6` beats per second & speed of sound in air is `332 m//s`, the frequency of the whistle is

A boy is walking away from a well at a speed of 1.0 m//s in a direction at right angles to the wall. As he walks, he below a whistle steadily. An observer towards whom the boy is walking hears 4.0 beats per second. If the speed of sound is 340 m//s , what is the frequency of the whistle?

A boy is walking away from a well at a speed of 1.0 m//s in a direction at right angles to the wall. As he walks, he below a whistle steadily. An observer towards whom the boy is walking hears 4.0 beats per second. If the speed of sound is 340 m//s , what is the frequency of the whistle?

A man standing on a platform observes that the frequency of the sound of a whistle emitted by a train drops by 140 Hz. If the velocity of sound in air is 330 m/s and the speed of the train is 70 m/s, the frequency of the whistle is

A man standing on a platform observes that the frequency of the sound of a whistle emitted by a train drops by 140 Hz. If the velocity of sound in air is 330 m/s and the speed of the train is 70 m/s, the frequency of the whistle is

A boy riding on a bicycle going at 12 km h^-1 towards a vertical wall whistles at his dog on the ground. If the frequency of the whistle is 1600 Hz and the speed of sound in air is 330 m s^-1, find (a) the frequency of the whistle as received by the wall (b) the frequency of the reflected whistle as received by the boy.