A boy riding on his bike is going towards east at a speed of `4sqrt2ms^-1`. At a certain point he produces a sound pulse of frequency 1650 Hz that travels in air at a speed of `334 m s^-1` . A second boy stands on the ground `45^@` south of east from him. Find the frequency of the pulse as received by the second boy.

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.

A person standing on a road sends a sound signal to the driver of a car going away from him at a speed of 72 km h^-1. The signal travelling at 330 m s^-1 in air and having a frequency of 1600 Hz gets reflected from the body of the car and returns. Find the frequency of the reflected signal as heard by the person.

A bus is moving with a velocity of 5 ms^(-1) towards a huge wall. The drive sounds a horn of frequency 165Hz. If the speed of sound in air is 335 m//s, the number of beats heard per second by a passenger on the bus will be

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 )

Two trains are moving towards each other at speeds of 20 m/s and 15 m/s relative to the ground. The first train sounds a whistle of frequency 600 Hz . the frequency of the whistle heard by a passenger in the second train before the train meets is (the speed of sound in air is 340 m/s )

a bus is moving with a velocity 4 m/s towards a wall, the driver sounds a horn of frequency 173 Hz . if the speed of sound in air is 350 m/s. the number of beat heard per second by a passanger on the bus will be

a bus is moving with a velocity 4 m/s towards a wall, the driver sounds a horn of frequency 173 Hz . if the speed of sound in air is 350 m/s. the number of beat heard per second by a passanger on the bus will be

A source of sound of frequency 256 Hz moves rapidly towards a wall with a velocity of 5 ms^(-1). How many beats per second will be heard if sound travels at a speed of 330 m/s?