A car moving at 36 ms passes a stationary police car whose
A car moving at 36 m/s passes a stationary police car whose siren has a frequency of 500 hz. What is the change in the frequency (in Hz) heard by an observer in the moving car as he passes the police car? (The speed of sound in air is 343 m/s.)
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a brown colored salt contains a cation from group 3 fe mn ni it has no reaction with concentrated h2so4 and produces a
a car moving at 36 ms passes a stationary police car whose siren has a frequency of 500 hz what is the change in the
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