354711 A stationary source emitting sound at a fixed frequency \(f_{0}\), which is reflected by two cars approaching the source. The difference between the frequencies of sound reflected from the cars is \(1.5 \%\) of \({f_0}\)The difference in the speeds of cars is
[Note: The cars are moving at constant speeds much smaller than the speed of sound which is \(330\;m{s^{ - 1}}\)]

354712 A motor-cyclist moving towards a huge cliff with a speed of \({18 {kmh}^{-1}}\), blows a horn of source frequency 325 Hz . If the speed of the sound in air is \({330 {~ms}^{-1}}\), the number of beats heard by him is

354713 A train moving at a speed of \(220\;m{s^{ - 1}}\) towards a stationary object, emits a sound of frequency \(2000\;Hz\). Some of the sound reaching the object gets reflected back to the train as echo. The frequency of the echo as detected by the driver of the train is: (speed of sound in air is \(330\;m{s^{ - 1}}\) )

354714 Two factories are sounding their sirens at \(800\;Hz\). A man goes from one factory to other at a speed of \(2\;m/s\). The velocity of sound is \(320\;m/s\). The number of beats heard by the person in one second will be

354711 A stationary source emitting sound at a fixed frequency \(f_{0}\), which is reflected by two cars approaching the source. The difference between the frequencies of sound reflected from the cars is \(1.5 \%\) of \({f_0}\)The difference in the speeds of cars is
[Note: The cars are moving at constant speeds much smaller than the speed of sound which is \(330\;m{s^{ - 1}}\)]

354712 A motor-cyclist moving towards a huge cliff with a speed of \({18 {kmh}^{-1}}\), blows a horn of source frequency 325 Hz . If the speed of the sound in air is \({330 {~ms}^{-1}}\), the number of beats heard by him is

354713 A train moving at a speed of \(220\;m{s^{ - 1}}\) towards a stationary object, emits a sound of frequency \(2000\;Hz\). Some of the sound reaching the object gets reflected back to the train as echo. The frequency of the echo as detected by the driver of the train is: (speed of sound in air is \(330\;m{s^{ - 1}}\) )

354714 Two factories are sounding their sirens at \(800\;Hz\). A man goes from one factory to other at a speed of \(2\;m/s\). The velocity of sound is \(320\;m/s\). The number of beats heard by the person in one second will be

354711 A stationary source emitting sound at a fixed frequency \(f_{0}\), which is reflected by two cars approaching the source. The difference between the frequencies of sound reflected from the cars is \(1.5 \%\) of \({f_0}\)The difference in the speeds of cars is
[Note: The cars are moving at constant speeds much smaller than the speed of sound which is \(330\;m{s^{ - 1}}\)]

354712 A motor-cyclist moving towards a huge cliff with a speed of \({18 {kmh}^{-1}}\), blows a horn of source frequency 325 Hz . If the speed of the sound in air is \({330 {~ms}^{-1}}\), the number of beats heard by him is

354713 A train moving at a speed of \(220\;m{s^{ - 1}}\) towards a stationary object, emits a sound of frequency \(2000\;Hz\). Some of the sound reaching the object gets reflected back to the train as echo. The frequency of the echo as detected by the driver of the train is: (speed of sound in air is \(330\;m{s^{ - 1}}\) )

354714 Two factories are sounding their sirens at \(800\;Hz\). A man goes from one factory to other at a speed of \(2\;m/s\). The velocity of sound is \(320\;m/s\). The number of beats heard by the person in one second will be

354711 A stationary source emitting sound at a fixed frequency \(f_{0}\), which is reflected by two cars approaching the source. The difference between the frequencies of sound reflected from the cars is \(1.5 \%\) of \({f_0}\)The difference in the speeds of cars is
[Note: The cars are moving at constant speeds much smaller than the speed of sound which is \(330\;m{s^{ - 1}}\)]

354712 A motor-cyclist moving towards a huge cliff with a speed of \({18 {kmh}^{-1}}\), blows a horn of source frequency 325 Hz . If the speed of the sound in air is \({330 {~ms}^{-1}}\), the number of beats heard by him is

354713 A train moving at a speed of \(220\;m{s^{ - 1}}\) towards a stationary object, emits a sound of frequency \(2000\;Hz\). Some of the sound reaching the object gets reflected back to the train as echo. The frequency of the echo as detected by the driver of the train is: (speed of sound in air is \(330\;m{s^{ - 1}}\) )

354714 Two factories are sounding their sirens at \(800\;Hz\). A man goes from one factory to other at a speed of \(2\;m/s\). The velocity of sound is \(320\;m/s\). The number of beats heard by the person in one second will be