A policeman on duty detects a drop detects a drop of `15%` in the pitch of the horn of a motor car as it crossed him. If the velocity of sound is `330metre //sec`., calculate speed of the car.

A policeman on duty detects a drop of 10% in the pitch of the horn of a moving car as it crosses him. If the velocity of sound is 330 m//s , the speed of the car will be

A gatekeeper in a colony observes a drop of 10% in the pitch of a motor car as it crosses him. Calculate the speed of motor car if velocity of sound is 332 m/s.

Explain the formatin of stationary wave by analytical method. Show that nodes and antinodes are equally spaced in a stationary wave. The speed limit for a vehicle on road is 120 km/hr. A policeman detects a drop of 10 % in the pitch of horn of a car as it passes him. Is the policeman justified in punishing the car driver for crossing the speed limit ? ( Given : Velocity of sound = 340 m/s )

A man standing on a platform observes that the frequency of the sound of a whistle emitted by a train drops by 140 Hz. If the velocity of sound in air is 330 m/s and the speed of the train is 70 m/s, the frequency of the whistle is

The driver of a car approaching a cliff with a uniform velocity of 15 m s^(-1) sounds the horn and the echo is heard by the driver after 3 seconds . If the velocity of sound is 330 m s^(-1) , calculate the distance between the cliff and the point where the horn was sounded ? Also calculate the distance between the cliff and the point where the echo is heard ?

A stone is dropped into a well and the sound of inpact of stone on the water is heard after 2.056 sec of the release of stone form the top. If acc. Due to gravity is 980 cm//sec^(2) and velocity of sound in air is 350 m//s , calculate the depth of the well.