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1 October, 14:23

An opera singer in a convertible sings a note at 700 hz while cruising down the highway at 83 km/h. the speed of sound in the air is 343 m/s. part a what is the frequency heard by a person standing beside the road in front of the car?

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  1. 1 October, 17:01
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    In meters per second, the singer is traveling ...

    ... 83 km/h * (1 h) / (3600 s) * (1000 m) / (1 km) ≈ 23 1/18 m/s

    Then the observed frequency is ...

    ... f' = 343 / (343 - 23.056) ·700 Hz ≈ 750.4 Hz
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