A policeman on duty at a crossing chaiienges a motor driver for crossing the speed limit 100 km/hr by deflecting a change of 20 vibrations in the horn note of frequency 128 Hz, as the car passes him. Is he correct ?(Velocity of sound in air = 340 m/s)
A policeman on duty at a crossing chaiienges a motor driver for crossing the speed limit 100 km/hr by deflecting a change of 20 vibrations in the horn note of frequency 128 Hz, as the car passes him. Is he correct ?(Velocity of sound in air = 340 m/s)
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Transcribed Image Text:A policeman on duty at a crossing
chaiienges a motor driver for crossing the
speed limit 100 km/hr by deflecting a change of
20 vibrations in the horn note of frequency 128
Hz, as the car passes him. Is he correct
?(Velocity of sound in air = 340 m/s)
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