A motor car is approaching towards a crossing with a velocity of `75 kmh^(-1)`.The frequency of sound of its horn as heard by a policeman standing on the crossing is 260 Hz.What is the real frequency of the horn ? Speed of sound =`332 ms^(-1)`.

A motor car is approaching towards a crossing with a velocity of 72 " km h"^(-1) . The frequency of the sound of its horn as heard by a policeman standing on the crossing is 260 Hz. The frequency of horn is

A train A is travelling at a speed of 108 km hr^(-1) The train approaches another train B standing on the platform.The engine of the train B below its horn. The frequency of the horn as observed by the driver in train A is 504 Hz. The frequency of the horn of train B is (speed of sound = 330 ms ^(-1)

A car moving at 108 km h^-1 finds another car in front of it going in the same direction at 72 km h^-1 . The first car sounds a horn that has a dominant frequency of 800 Hz. What will be the apparent frequency heard by the driver in the front car ? Speed of sound in air = 330 ms^-1

A train is approaching towards a platform with a speed of 10 ms^(-1) , while blowing a whistle of frequency 340 Hz. What is the frequency of whistle heard by a stationary observer on the platform ? (given, speed of sound =340 ms^(-1) )

Two buses X and Y are approaching each other and their velocities are 120 km/hr and 140 km/hr, respectively. The frequency of horn emitted by X as heard by the passengers in Y is 1100 Hz. What will be the frequency of the horn heard by the passenger in X. Velocity of sound = 340 m/s.

A bus is moving towards a gauge wall with a velocity of 5m//s^(-1) . The driver sounds a horn of frequency 200 Hz . The frequency of the beats heard by a passenger of the bus will be ………… Hz (Speed of sound in air = 342m//s^(-1))

Calculate the apparent frequency of the horn of a car approaching a stationary listener with a velocity of 12 ms^(-1) . The frequency of horn is 500 Hz.The speed of sound is 332 ms^(-1) .

A car sounding its horn at 480Hz moves towards a high wall at a speed of 20ms^(-1) , the frequency of the reflected sound heard by the man sitting in the car will be nearest to , (speed of sound =330m//s)

Two aeroplanes A and B are approaching each other and their velocities are 108 kmh^(-1) and 144 kmh^(-1) respectively. The frequency of a note emitted by A as heard by the passangers in B is 1170 Hz. Calculate the frequency of the note heard by the passangers in A. Velocity of sound = 350 ms^(-1) .

A car with a horn of frequency 620 Hz travels towards a large wall with a speed of 20 ms ^(-1) velocity of sound is 330 ms ^(-1) The frequency of echo of sound of horn as heard by the driver is