A sound wave radiates from a source in all directions. If the power of the sound source is 200 watts, then the intensity of the sound wave 100 m from the source is
A. 2.2 milliWatts/m2.
B. 2.0 milliWatts/m2.
C. 1.8 milliWatts/m2.
D. 1.6 milliWatts/m2.
E. 1.2 milliWatts/m2.
D. 1.6 milliWatts/m2.
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