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A locomotive approaching a crossing at a speed of 20m/s sounds a whistle of frequency 640Hz when 1km from the crossing. There is no wind and the speed of sound in air is 330m/s. What frequency is heard by an observer √3km on the straight road from the crossing at right angle. A locomotive approaching a crossing at a speed of 20m/s sounds a whistle of frequency 640Hz when 1km from the crossing. There is no wind and the speed of sound in air is 330m/s. What frequency is heard by an observer √3km on the straight road from the crossing at right angle.

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99996112985-0-0

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