what is the intensity of sound waves produced by a piano at a distance of 1.5 m when the power output of the piano is 3.0 W?
I=I0/R2=3/1.52=1.33 (W)I=I_0/R^2=3/1.5^2=1.33\ (W)I=I0β/R2=3/1.52=1.33 (W)
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