A whistle of frequency 500 Hz tied to the end of a string of length 1.2 m revolves at 400 rev / min . A listener standing some distance away in the plane of rotation of whistle hears frequencies in the range (speed of sound = 340 m / s )

A whistle of frequency 660 Hz moves in a circle of radius 1 m at an angular speed of 10 rad/s. The highest frequecny heard by a listener at a long distance and at rest with respect to the center of the circle is (Let speed of sound =340 m//s.)

A whistle emitting a sound of frequency 440 Hz is tied to a string of 1.5 m length and roated with an angular velocity of 20 rad//s in the horizontal plane. Calculate the range of frequencies heard by an observer stationed at a larger distance from the whistle .(Speed of sound = 330 m//s) .

A train approaching a railway crossing at a speed of 120 km/h sounds a whistle of frequency 576 Hz, when it is 288 m away from the crossing . The frequency heard by the observer standing on the road perpendicular to the track from the crossing at a distance of 384 m is (Speed of sound in air = 340 ms^(-1) )

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) )

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) )

A source of sound of frequency 256 Hz is rotating in a circle of radius 3 m with angular speed of 20 rad/s. A listener is standing at rest along the line of centre of the circle. Under which position of the source of sound the listener will hear sound of (a) maximum frequency (b) minimum frequency (c) same frequency as the frequency of source.

A whistle emmitting a sound of frequency 440 Hz is tied to a string of 1.5m length and rotated with an angular velocity of 20rad s^(-1) in the horizontal plane. Calculate the range of frequencies heard by an observer stationed at a large distance from the whistle.

A whistle emitting a sound of frequency 440 h_(z) is tied to a string of 1.5 m length and roated with an angular velocity of 20 rad//s in the horizontal plane. Calculate the range of frequencies heard by an observer stationed at a larger distance from the whistle .(Speed of sound = 330 m//s) .