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Sahay Sir > Question Answers > Cengage NEET by C.P Singh > Part 1 > Chapter 17 - Sound Waves > A train has just completed a U-curve in a track which is a semicircle. The engine is at the forward end of the semi-circular part of the track while the last carriage is at the rear end of the semi-circular track. The driver blows a whistle of frequency 200 Hz. Velocity of sound is 340 m/sec. Then the apparent frequency as observed by a passenger in the middle of a train when the speed of the train is 30 m/sec is

A train has just completed a U-curve in a track which is a semicircle. The engine is at the forward end of the semi-circular part of the track while the last carriage is at the rear end of the semi-circular track. The driver blows a whistle of frequency 200 Hz. Velocity of sound is 340 m/sec. Then the apparent frequency as observed by a passenger in the middle of a train when the speed of the train is 30 m/sec is

An engine is moving on a circular track with a constant speed. It is blowing a whistle of frequency 500Hz. The frequency received by an observer standing stationary at the centre of the track is