A police car moving at 5.4Km/Hr sounds siren emitting frequency of 550Hz which is reflected back from a stationary object some distance ahead of the car. The number of beats heard per second by an observer sitting in the car is (Assume velocity of sound in air =330 m/sec)

The ratio of the apparent frequencies of a car when approaching and receding a stationary observer is 11:9 What is the speed of the car, if the velocity of sound in air is 330 m/s?

A siren emitting a sound of frequency 800 Hz moves away from an observer towards a cliff at a speed of 15ms^-1 . Then the frequency of sound that the observer hears in the echo reflected from the cliff is (Take velocity of sound in air =330ms^-1 )

A vehicle sounding a whistle of frequency 256Hz is moving on a straight road,towards a hill with velocity of 10ms^-1 . The number of beats per second observed by a person travelling in the vehicle is (velocity of sound = 300ms^-1

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) )

A car has two horns having a difference in frequency of 180 Hz. The car is approaching a stationary observer with a speed of 60 ms^(-1) . Calculate the difference in frequencies of the notes as heard by the observer, If velocity of sound in air is 330 ms^(-1) .

A car moving at a speed of 72km/hr sounds its whistle which has a frequency of 550Hz, Find the frequencies heard by a stationary observer as the car approaches and then recedes from the observer, velocity of sound =340m/s.

A police car moving at 22 m//s , chase a motoclist. The police man has horn at 176 H_(Z) , While both of them move towards a stationary siran of frequency 165 H_(Z) . Calulate the speed of the motorcyclist, if he does not observer any beats. (velocity of sound in air = 330 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

Two tuning forks A and B are vibrating at the same frequency 256 Hz. A listener is standing midway between the forks. If both tuning forks move to the right with a velocity of 5(m)/(s) , find the number of beats heard per second by the listerner (speed of sound in air is 330(m)/(s) ).

Two tuning forks A and B are vibrating at the same frequency 256 Hz. A listener is standing midway between the forks. If both tuning forks move to the right with a velocity of 5(m)/(s) , find the number of beats heard per second by the listerner (speed of sound in air is 330(m)/(s) ).