A driver in a stationary car blows a horn which produces monochromatic sound waves of freqeuncy 1000 Hz normally towards a reflecting wall. The wall approaches the car with a speed of `3.3(m)/(s)`.

A driver in a stationary car horns which produces monochromatic sound waves of frequency n=1000Hz , normally towards a reflecting wall. If the wall approaches the car will a velocity u=3.3(m)/(s) , calculate the frequency of sound reflected from wall and heard by the driver. What is the percentage change of sound frequency of reflection from the wall?

A police car moving with speed 5 m/s is blowing a siren of frequency 600 Hz and travelling towards a vertical wall. Calculate (a) number of beats heard in 1 s by driver of car. (b) beats heard by a person standing between car and well. (c) beats heard by a person standing behind the car. (Speed of sound is 340 m/s)

Bus moving with speed v forwards a stationary wall. it produces sound of frequency f = 420 Hz. The heard frequency of reflected sound from wall by driver is 490 Hz . Calculate the speed v of bus. The velocity of sound in air is 330 m/s .

A stationary police car sounds a siren with a frequency of 990 Hz. If the speed of sound is 330 m/s, an observer, driving towards the car with a speed of 33 m/s, will hear a frequency of

A stationary motion detector sends sound waves of frequency 3.00 MHz toward a truck approaching at a speed of 61.0 m/s. What is the frequency of the waves reflected back to the detector?

A car blowing a horn of frequency 350 Hz is moving normally towards a wall a speed of 5 m/s The beat frequency heard by a person standing between the car and wall is (speed of sound in air =350 m/s )

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