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The intensity of sound from a point source is 1.0 x 10–8 W/m2 at a distance of 5.0 from the source. What will be the intensity at a distance of 25 m from the source?
sound intensity is inversely proportional to r2.henceS1/ S2 = (r2/ r1)21 * 10-8 / S2 = (25 / 5)2S2 = 1* 10 –8/ 25S2 = 4 * 10 –10 W/m2
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