15.0 meters from a sound source that radiates freely in all directions, the intensity is 0.00230 W/m2. What is the rate at which the source is emitting sound energy?
Physics - Elena, Tuesday, June 19, 2012 at 9:16am
Area of the sphere around the source is 4•π•R² = 2827.4 m²
The rate is 2827.4•0.00230 =6.5 W