A boy sitting on a swing which is moving to an angle of ${30}^{\circ }$ from the vertical is blowing a whistle which is of frequency $1000Hz$. The whistle is $2m$ from the point of support of the swing. If a girl stands in front of the swing, the maximum and minimum frequencies she will hear are
(velocity of sound $=330m/s$, $g=9.8m/s^2$)

A source on a swing which is covering an angle $\theta$ from the vertical is producing a frequency $v$. The source is distant $d$ from the place of support of swing. If velocity of sound is $c$, acceleration due to gravity is $g$. then the maximum and minimum frequency hearfd by a listener in froun of swing is

A train is travelling at $120kmph$ and blows a whistle of frequency $1000Hz$ . The frequency of the note heard by a stationary observer if the train is approaching him and moving away from him are (Velocity of sound in air $=330=m{s}^{-1}$)

A whistle of frequency 500 Hz tied to the end of a string of length 1.2 m revolves at 400 rev / min . A listener standing some distance away in the plane of rotation of whistle hears frequencies in the range (speed of sound = 340 m / s )

An engine blowing a whistle of frequency 133 Hz moves with a velocity of $60\frac{m}{s}$ towards a hiss from which an echo is heard. Calculate the frequency of the echo heard by the driver. (velocity of sound in air in $340\frac{m}{s}$.)

Two passenger trains moving with a speed of $108km/hour$ cross each other. One of them blows a whistle whose frequency is $750Hz$. If sound speed is $330m/s$, then passengers sitting in the other train, after trains cross each other they will hear sound whose frequency will be

A whistle of frequency 500 Hz tied to the end of a string of length 1.2 m revolves at 400 rev / min . A listener standing some distance away in the plane of rotation of whistle hears frequencies in the range (speed of sound = 340 m / s )

A man holding a sound source at the top of a tower emitting frequency of sound as $v=1000Hz$. Suddenly it slips from his hand and falls down with $\text{'}g\text{'}$ acceleration. The frequency of sound heard by the man at $t=4\sec$. (Velocity of sound $=320m/s$, $g=10m/s^2$)

The frequency of a whistle of an engine is 600 cycles / sec is moving with the speed of 30 m / sec towards an observer. The apparent frequency will be (velocity of sound = 330 m / s )

A train is moving with speed 72 km/h towards a hill blows a whistle of frequency 1240Hz. the frequency of echo heard by driver is(speed of sound=330m/s)

A train is whistling while approaching a tunnel at a speed of 36 kmph. The driver hears the echo of the whistle reflected from the tunnel and estimates its frequency to be 850 Hz. Find the actual frequency of the whistle. The velocity of sound in air $=330m/s$