A train producing a siren with a frequency of 1500 Hz approaches a stationary observr with a speed of 72 kmph. What is apparent frequency of sound heard by him when it crossing him ?( Given velocity of sound `v = 340ms^(-1)` )

A source producing sound of frequency 170 Hz is approaching a stationary observer with a velocity 17 ms^(-1) . The apparent change in the wavelength of sound heard by the observer is (speed of sound in air = 340 ms^(-1) )

A source producing sound of frequency 170 Hz is approachig a stationary observed with a velocity of 17ms^-1 . The apparent change in the wavelength of sound heard by the observer is (speed of sound in air = 340ms^-1 )

A source producing sound of frequency 170 Hz is approaching a stationary observer with a velocity 17 ms^(-1) . The apparnet change in the wavelength of sound heard by the observer is (speed of sound in air =340 ms^(-1))

A source producing a sound of frequency 90 Hz is approaching a stationary listener with a speed equal to (1/10) of the speed of sound. What will be the frequency heard by the listener?

A car sounding a horn producing a note of 500 Hz., approaches and then passes a stationary observer at a steady speed of 15ms^(-1)? . Calculate the change in pitch of the note heard by the observer. (Velocity of sound = 340 ms^(-1)) .

A person is standing on a railway platform. An engine blowing a whistle of frequency 640 Hz approaches him with a speed of 72 km//hr . The frequency of the note heard by the person is (velocity of sound is 340 m//s )

A person is standing on a railway platform.An engine blowing a whistle of frequency 640 Hz approaches him with a speed of 72 km /hr,The frequency of the note heard by the person is (velocity of sound is 340 m/s )

A whistle giving out a sound of frequency 450Hz , approaches a stationary observer at a speed of 33ms_(1) . The frequency heard by the observer is (speed of sound =330m s_(1) ____.