On a quiet day, two persons A and B, each sounding a note of frequency 580 Hz, are standing a few metres apart. Calculate the number of beats heard by each in one second when A moves towards B with a velocity of `4 ms^(-1)`. (Speed of sound in air `= 330 ms^(-1)`.)

The frequencies of whistle produced by two persons (X and Y) standing few metres apart, on a quiet day is 550 Hz each. What will be the number of beats heard by each of them in one second when X starts movig towards Y with a velocity of 2 m/s ?

A tuning fork of frequency 380 Hz is moving towards a wall with a velocity of 4(m)/(s) Then the number of beats heard by a stationary listener between direct and reflected sound will be (velocity of sound in air is 340(m)/(s) )

Two persons A and B , each carring a source of frequency 300 H_(Z) , are standing a few metre apart. A starts moving towards B with velocity 30 m//s . If speed of sound is 300 m//s , which of the following is true?

Calculate the beat frequency heard when two sound sources of wavelength 35cm and 35.2 cm are sounded together. The speed of sound in air is 330 ms^(-1)

Two persons A and B ,each carrying a source of sound of frequency nu ,are standing a few meters a part in quiet field. A starts moving to words B with a speed u. If V is the speed of sound,the number of beats heard per second by A will be

The frequency of a tuning fork is 600 Hz. What is the number of vibrations made by the tunning fork, when the sound produced by the tuning fork travels a distance of 110 ? (Velocity of sound in air is 330 ms^(-1) )

A source producing sound of frequency 170 Hz is approaching a stationary observer with a velocity 17 ms^(-1) . The apparent change in the wavelength of sound heard by the observer is (speed of sound in air = 340 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 car blowing a horn of frequency 350 Hz is moving normally towards a wall a speed of 5 m/s The beat frequency heard by a person standing between the car and wall is (speed of sound in air =350 m/s )

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) )