A car moving at 40 km/hr passes a factory as a siren of frequency 500 Hz is to be sounded. What does the frequency appear to the driver of the car before and after passing by the factory ? [Speed of sound in air = 340 m/s]
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Q: Ex./90 A car moving at 40 km/hr passes a factory as a siren of frequency 500 Hz is sounded. What…
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