A fighter plane moving in a vertical loop with constant speed of radius `R` . The center of the loop is as a height `h` directly overhead of an observer standing on the ground. The observer receives maximum frequency of the sound produced by the plane when it is nearest to him . Find the speed of the plane. Velocity of sound in air is `upsilon` .

An observer standing on a railway crossing receives frequencies 2.2 kHz and 1.8 kHz when the tran approaches and recedes from the observer. Find the velocity of the train (speed of sound in air is 300 m/s).

An observer standing on a railway crossing receives frequencies 2.2 kHz and 1.8 kHz when the tran approaches and recedes from the observer. Find the velocity of the train (speed of sound in air is 300 m/s).

An observer standing on a railway crossing receives frequencies 2.2 kHz and 1.8 kHz when the tran approaches and recedes from the observer. Find the velocity of the train (speed of sound in air is 300 m/s).

A statinary observer receives a sound of frequency 2000 Hz. The variation of apparent frequency and time is shown. Find the speed of source, if velocity of sound is 300(m)/(s)

A statinary observer receives a sound of frequency 2000 Hz. The variation of apparent frequency and time is shown. Find the speed of source, if velocity of sound is 300(m)/(s)

A supersonic jet plane moves parallel to the ground at speed v= 0.75 mach (1 mach = speed of sound). The frequency of its engine sound is v_0= 2kHz and the height of the jat plane is h= 1.5 km. At some instant an observer on the ground hears a sound of frequency v= 2v_0 . Find the instant prior to the instant of hearing when the sound wave received by the observer was emitted by the jet plane. Velocity of sound wave in the condition of observer =340 m"/"s .

A source of frequency 1800 Hz is moving on a line,with speed 30m/s .An observer is standing at a point far distant from the line.The wavelength of sound received by the observer when the source is nearest to the observer is n/11 metres.Find n .