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A bicyclist is pedaling down a road at 8 m/sec. A car approaches him from behind....

A bicyclist is pedaling down a road at 8 m/sec. A car approaches him from behind. When the car is preparing to pass he sounds his horn. At first the bicyclist hears a frequency of 520 HZ but the sound appears to drop in frequency to 470 HZ after the car passes.

a) How fast is the car moving? (v sound = 340 m/sec)(answer to nearest whole number)

10

b) what is the actual frequency of the horn (don't assume it is the average of the 2 perceived frequencies)

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