approaching a vertical wall notices that the frequency of his car horn

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A driver in a car, approaching a vertical wall notices that the frequency of his car horn, has changed from 440 Hz to 480 Hz, when it gets reflected from the wall. If the speed of sound in air is 345 m/s, then the speed of the car is
19
Sep
A driver in a car, approaching a vertical wall notices that the frequency of his car horn, has changed from 440 Hz to 480 Hz, when it gets reflected from the wall. If the speed of sound in air is 345 m/s, then the speed of the car is A driver in a car approaching [...]
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Tags: A driver in a car , approaching a vertical wall notices that the frequency of his car horn , has changed from 440 Hz to 480 Hz , then the speed of the car is , when it gets reflected from the wall. If the speed of sound in air is 345 m/s ,