A Boy is walking away from a wall at a speed of 1m/s in a direction at right angles to the wall. As he walks, he blows a whistle steadily. An observer toward whom the boy is walking hearts 4 beats per second. If the speed of sound is 340 m/s, what is the frequency of the whistle?(adsbygoogle = window.adsbygoogle || []).push({});

My original approach did not come out anywhere near right, so im just going to ask if this analysis of the situation is right.

The boy is walking toward someone blowing a whistle. So there are two doppler effects? The one caused from the boy walking toward an observer and the sound wave reflecting off the wall, so I would calculate two doppler effects and combine them? And how can I change beat frequency to frequency, if thats possible even.

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# Homework Help: Beat Frequency of whistle

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