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A sound source approximated as a point radiates sound equally in all directions. At a distance of 5.2 m from the source, the intensity is 3.5 x 10-3 W/m2. See example 15.5
a) What is the intensity 2.0 m from the source?
b) What is the total power of the source (intensity x area)? The area of a spherical shell is 4?r2.
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