(II) A police car sounding a siren with a frequency of 1580 Hz is traveling at 120.0 km/h .
(b) What siren frequencies are heard in a car traveling at 90.0 km/h in the opposite direction before and after passing the police car?
(II) A police car sounding a siren with a frequency of 1580 Hz is traveling at 120.0 km/h .
(b) What siren frequencies are heard in a car traveling at 90.0 km/h in the opposite direction before and after passing the police car?