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4 October, 06:55

The security alarm on a parked car goes off and produces a frequency of 951 hz. the speed of sound is 343 m/s. as you drive toward this parked car, pass it, and drive away, you observe the frequency to change by 99 hz. at what speed are you driving?

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  1. 4 October, 07:20
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    951hz divide by 343m/s = 2.77259475

    times the answer by 99hz = 274.48688

    to 1 d. p is 274.5m/s
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