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A source emits sound waves isotropically. The intensity of the waves 3.37 m from the source is 2.39 × 10-4 W/m2. Assuming that the energy of the waves is conserved, find the power of the source.

2007-12-02 03:11:34 · 2 answers · asked by Anonymous in Science & Mathematics Physics

2 answers

The surface area of a sphere of radius 3.37 m is

4 π r^2

Multiply that area by the given intensity ( power per square meters ) to get the power at the source.

2007-12-02 03:19:15 · answer #1 · answered by jgoulden 7 · 1 0

I= P/ (4πr^2)
P=2.39*10^-4*4π3.37^2
P=0.034W

2007-12-02 03:22:42 · answer #2 · answered by 3.141592653589793238462643383279 3 · 0 1

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