Physics, 02.03.2021 15:10 maysahdabest

Two cars approaching each other , first car moves at 72 km/h ,the second car moves at 90 km/h, the first car started its siren with a frequency of 650 Hz. If the speed of the sound is 350 m/s, then what is the frequency of the sound heard by the driver of the second car from the police car?

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Two cars approaching each other , first car moves at 72 km/h ,the second car moves at 90 km/h, the f...