Intensity: A radio transmitter is operating at an average power of 4.00 kW and is radiating uniformly in all directions. What is the average intensity of the signal 8.00 km from the transmitter?
A. 4.97 ?W/m2
B. 2.49 ?W/m2
C. 0.00497 W/m2
D. 0.00249 W/m2
Answer: A
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