Car X and Car Y approaching each other. Frequency heard by car Y is 1320 Hz. Then, find actual frequency.

Two cars X and Y are approaching each other with velocities 36km/h and 72 km/h respectively. The frequency of a whistle sound as emitted by a passenger in car X, heard by the passenger in car Y is 1320 Hz. If the velocity of sound in air is 340 m/s, the actual frequency of the whistle sound produced is __________Hz.

Two cars P and Q are approaching each other with velocities of 36 km/h and 72 km/h respectively. The frequency of a note emitted by car P as heard by the person sitting in car Q is 850 Hz. What will be the frequency of note heard by person sitting in car P ? Velocity of sound = 340 m/s.

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.

In a car race sound signals emitted by two cars are detected by the detector on the straight track at the end point of the race. Frequency observer is 330 Hz and 360 Hz and the original frequency is 300 Hz of both cars. Race ends with the separation of 100 m between the cars. Assume both cars move with constant velocity and velocity of sound is 330(m)/(s) . Find the time taken by wining car.

Two cars A and B approach a statinary observer from opposite sides as shown in figure. Observer hears no beats. If the frequency of the horn of the car B is 504 Hz, the frequency of horn of car A will be

A car and bike are moving in opposite directions on parallel tracks with speeds of 72 km/h and 60 km/h respectively. A boy sitting in car is continuously sounding a whistle of frequency 400 Hz. Calculate the frequency of sound heard by person sitting on bike (a) if car and bike are approaching each other. (b) if car and bike are moving away from each other.

A driver in a car , approaching a vertical wall notices that the frequency of his car horn , has changed form 440 Hz to 480 Hz , when it gets reflected form the wall . If the speed of the sound in are 345 m/s , then the speed of the car is :

Two cars are approaching eachother each moving with a speed v.Find beat frequency as heard by driver of one carboth are emitting sound of frequency f_0

Two strings X and Y of a sitar produce a beat frequency 4 Hz.When the tension of the string Y is slightly increased the beat frequency is found to be 2 Hz. If the frequency of X is 300 Hz,then the original frequency of Y was