# Answer to Question #2275 in Mechanics | Relativity for keith

Question #2275

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.

Expert's answer

The area of the sphere around the source is 4*π*R

So the rate is 900*π*0.00055 = 1.5551 W

^{2}= 4*π*15^{2}= 900*π.So the rate is 900*π*0.00055 = 1.5551 W

**Answer: 1.5551 W.**
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