Amy, standing near a straight road, records the sound of the horn of a car trave

Question

Amy, standing near a straight road, records the sound of the horn of a car traveling at a constant speed. The recorded frequency as function of the car position along the road for trials at different car speeds is graphed.

Less than: In trial A, Amy's distance from the path is ..... in C.
False: When the car is far away, the average of the frequencies moving in and out equals the frequency at rest.
Equal to: The speed in trial A is ..... to that in C.
True: The lowest speed is in trial D.
True: The highest speed is in trial E.
Greater Than: The speed in trial B is ..... to that in D.

Using the data on the figure, calculate the speed of the car in trial E. Use speed of sound=340 m/s.

Explanation / Answer

42.5m/s

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