A police car sounds its siren, which has a true frequency of 600 Hz, as it leaves the police station. If the police car is traveling at 35 m/s away from the station, the frequency of the siren as heard by listeners back at the station is (use 344 m/s for the speed of sound)

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Quizplus · Accepted Answer

The frequency heard by listeners at the station is lower than the true frequency of the siren due to the Doppler effect, as the source is moving away from the observer. The observed frequency can be calculated using the formula $f' = f \frac{v}{v + vs}$, where $f'$ is the observed frequency, $f$ is the source frequency, $v$ is the speed of sound, and $vs$ is the speed of the source relative to the medium. Plugging in the given values: $f' = 600 \frac{344}{344 + 35} = 545$ Hz.

A Police Car Sounds Its Siren, Which Has a True