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 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 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 person feels 2.5% difference of frequency of a motor-car horn. If the motor-car is moving towards the person and the velocity of sound is 320 m/s, then the velocity of motor car will be (approximately)

A car sounding a horn of frequency 1000 Hz passes an observer. The ratio of frequencies of the horn noted by the observer before and after passing of the car is 11 : 9. If the speed of sound is v , the speed of the car is

A racing car moving towards a cliff, sounds its horn. The driver observes that the sound reflected from the cliff has a pitch one octave higher than the actual sound of the horn. If v is the velocity of sound, then the velocity of the car is

A toy-car, blowing its horn, is moving with a steady speed of 5 m//s, away from a wall. An observer, towards whom the toy car is moving, is able to heat 5 beats per second. If the velocity of sound in air is 340 m/s, the frequency of the horn of the toy car is close to :