kennydenny8133 kennydenny8133

31-01-2024
Physics

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A police car with a siren of frequency 8 kHz is moving with uniform velocity 36 km/h towards a tall building which reflects the sound waves. Speed of sound in air is 320 m/s. Frequency of siren heard by car driver is

A. 8.5 kHz
B. 825 kHz
C. 7.25 kHz
D. 7.5 kHz

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