Question

The security alarm on a parked car goes off and produces a frequency of 1390 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 139 Hz. At what speed are you driving?

Name: the security alarm on a parked car goes off and produces a frequency of 1390 hz the speed of sound is 343 ms as you drive toward this parked car pass it and drive away you observe the freque 28268
Uploaded: 2022-03-18T05:35:22-08:00
Duration: 1 min 22 s
Channel: Khoobchandra Agrawal
Description: the security alarm on a parked car goes off and produces a frequency of 1390 hz the speed of sound is 343 ms as you drive toward this parked car pass it and drive away you observe the freque 28268

          The security alarm on a parked car goes off and produces a frequency of 1390 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 139 Hz. At what speed are you driving?

the security alarm on a parked car goes off and produces a frequency of 1390 hz the speed of sound is 343 ms as you drive toward this parked car pass it and drive away you observe the freque 28268

Added by Jennifer W.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Khoobchandra Agrawal

03/18/2022

Step 1

Let $v_s$ be the speed of the source (the parked car), which is 0 m/s. Let $v$ be the speed of sound, which is 343 m/s. Let $v_o$ be the speed of the observer (you). Let $\Delta f$ be the change in frequency observed, which is 139 Hz. The Doppler effect formula Show more…

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The security alarm on a parked car goes off and produces a frequency of 1390 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 139 Hz. At what speed are you driving?