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1) A police car approaches a large wall at 27 27 m/s. Its siren emits a...

1) A police car approaches a large wall at 27 27 m/s. Its siren emits a 710 710 Hz signal. The frequency of the reflected sound observed by the officer is _____Hz.

2 )A police car moving at 6767 m/s is initially behind a truck moving in the same direction at 2323 m/s. The natural frequency of the car's siren is 715715Hz. The change in frequency observed by the truck driver as the car overtakes him is _______ Hz

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Doonlen elfect VI Vo v Vs given V=27m/ Sara 343+27 1 343-27 fo283113 Hz] bocah com o tempo as my Soure obsuiver (4= 312 Hz)

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