two identical motorbikes are racing towards each other, each at 40 m/sec.

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GarrettWills

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each bike has a horn that is soundin? two identical motorbikes are racing towards each other, each at 40 m/sec. each bike has a horn that is sounding a very low frequency signal of 22 hertz. What does each biker hear upon approach? What does each biker hear after they have passed each other?
 
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