Answer on Mechanics | Relativity Question for keith
15.0 meters from a sound source that radiates freely in all directions, the intensity is 0.000550 W/m2. What is the rate at which the source is emitting sound energy? answer in Watts.
The area of the sphere around the source is 4*π*R2 = 4*π*152 = 900*π.
So the rate is 900*π*0.00055 = 1.5551 W
Answer: 1.5551 W.
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