While cruising along on your scooter at7.50m/s, you see a van driving ahead of you (it is moving in the same direction you are) with speed11.3m/s. In a pathetic attempt to remove the driver from your road, you honk your horn to produce a tonefA. Having a highly tuned ear, you can detect that the sound bouncing off the back of the van and returning to you creates a beat frequency of10Hzwith the original tone. DeterminefA. speed of sound:343m/s.

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