A sound source of power 100 watts radiates sound uniformly in all directions. The intensity of the sound at a distance of 4.00 m is A) 0.301 W/m². B) 0.353 W/m². C) 0.497 W/m². D) 0.535 W/m². E) 0.621 W/m².

Question

Quizplus · Accepted Answer

The formula for the intensity of sound at a given distance is given by I = P/4πr^2, where P is the power of the sound source and r is the distance from the source. Substituting the given values, we get I = 100/4π(4^2) = 0.497 W/m^2. Therefore, the answer is choice C.

A Sound Source of Power 100 Watts Radiates Sound Uniformly