The whistle of an engine moving at `30km//h` is heard by a motorist driving at `15km//h` and he estimated the pitch to be 500. What would be the actual pitch if two are approaching each other ? Velocity of sound is 1220km//h .

An engine moving with a velocity of 36 km // hour blows a whistle which is heard by a motorist driving with 18km//hr to be 500 c.p.s. Calculate the actual frequency, when (a) Two are moving in opposite directions and approaching each other. (b) Two are moving in opposite directions and receding away. (c) Two are moving in the same direction , but motorist is behind the engine. (d) Two are moving in same direction but motorist is in front of engine. Velocity of sound =330 metre // sec

A car moving with a speed of 30 ms^(-1) is approaching a factory whistle having the frequency 700 Hz. Calculate the apparent pitch of the whistle as heard by the driver of the car ? (Velocity of sound = 350m/s)

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 trains A and B are approaching each other with 108 km h^(-1) and 126 km h^(-1) , respectively . If the train A sounds a whistle of frequency 500 Hz , find the frequency of the whistle as heard by a passenger in the train B . (a) before the trains cross each other and (b) after the trains cross each other . (Take velocity of sound as 330 m s^(-1) )

A ship is moving at a speed of 56 km//h . One second later , it is moving at 58 km//h . What is its acceleration?

What is the acceleration of a race car that moves at constant velocity of 300 km/h ?

What is the acceleration of a race car that moves at constant velocity of 300 km/h ?

What is the acceleration of the race car that moves at constant velocity of 300 km/h ?