A car P travelling at 20 `ms^(-1)`sounds its horn at a frequency of 400 Hz.Another car Qis travelling behind the first car in the same direction with a velocity `40 ms^(-1)`.The frequency heard by the passenger of the car Q is approximately [Take,velocity of sound = 360 `ms^(-1)`]

A car travelling towards a hill at 10 m//s sound its horn which a frequency 500 H_(Z) . This is heard in a second car travelling behind the first car in the same direction with speed 20 m//s . The sound can also be heard in the second car by reflections of sound the hill. The beat frequency heard by the driver of the sound car will be (speed of sound in air = 340 m//s)

A car 2 m long travelling at 30 ms^(-1) overtakes another car 4 m long travelling at 20 ms^(-1) . The time taken by the first car to pass the second car is

A policeman blos a whistle of frequency 400Hz as a car speeds past him with a velocity of 54km h^(-1) . Find the cahnge in frequency as heard by the driver of the car just as he passes the policeman. Velocity of sound in air is 350ms^(-1)

A policeman blows a whistle with a frequency of 500 Hz.A car approaches him with a velocity of 15 ms^(-1) .Calculate the change in frequency as heard by the driver of the car as he passes the policeman.Speed of sound in air is 300 ms^(-1) .

A car is travelling at (V)/(10) ms^(-1) and sounds horn of frequency 990 Hz. The apparent frequency heard by a police chasing the car at (V)/(9) ms^(-1) where V is velocity of sound

Two cars are moving in same direction with speed of 40kmh^(-1) Find the relative velocity of first car with another.

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 has two horns having a difference in frequency of 180 Hz. The car is approaching a stationary observer with a speed of 60 ms^(-1) . Calculate the difference in frequencies of the notes as heard by the observer, If velocity of sound in air is 330 ms^(-1) .

A police car horn emits a sound at a frequency 240 Hz. When the car is at rest. If the speed of the sound is 330 m/s the frequency heard by an observer who is approching the car at a speed of 11 m/s is

A car moving with a velocity of 20ms^(-1) is stopped in a distance of 40m. If the same car is travelling at double the velocity, the distance travelled by it for same retardation is