18. Waves & Sound
Wave Intensity
3:31 minutes
Problem 15a
Textbook Question
Textbook QuestionEnergy Output. By measurement you determine that sound waves are spreading out equally in all directions from a point source and that the intensity is 0.026 W/m^2 at a distance of 4.3 m from the source. (b) How much sound energy does the source emit in one hour if its power output remains constant?
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