You are at a concert, Coachella perhaps, listening to your favorite artist prefo

Q: You are at a concert, Coachella perhaps, listening to your favorite artist prefo

Apply from Doppler effect FL = Fs * (V + Vs)/(V-Vs) V = 340 m/s Vs = ? Fl = 43-1.5 = 41.5 Fs 43 Hz so FL = fs *(V/V-Vs) Vs = 331 *(1-43/41.5) Vs = 12 m/s

ID: 1365532 • Letter: Y

Question

You are at a concert, Coachella perhaps, listening to your favorite artist preform. You are a little late arriving and are slowly making your way through the crowd to the front of the stage. You notice that the sound engineers for the concert clearly hadn't been paying attention in their physics classes when placing only two speakers on stage, because you notice some obvious constructive and destructive interference going on as you are walking. When you are directly 40 m in front of the right speaker, the tuner app on your phone tells you that it is receiving zero intensity for frequency f 262 Hz. Based on this information, what is the CLOSEST the two speakers can be from each other onstage 2.

Explanation / Answer

Apply from Doppler effect

FL = Fs * (V + Vs)/(V-Vs)

V = 340 m/s

Vs = ?

Fl = 43-1.5 = 41.5

Fs 43 Hz

FL = fs *(V/V-Vs)

Vs = 331 *(1-43/41.5)

Vs = 12 m/s

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You are at a concert, Coachella perhaps, listening to your favorite artist prefo

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