Question: 3 points An observer approaching a stationary source at speed u hears a sound of frequency f1. If the same source approaches a stationary observer

3 points An observer approaching a stationary source at speed u

3 points An observer approaching a stationary source at speed u hears a sound of frequency f1. If the same source approaches a stationary observer at speed u, the observer hears a sound of frequency f2. What is the ratio f2/ f1 in terms of speed u and the sound speed v? Let us assume that the source always produces sound of frequency fo. and u

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