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Answer on Electromagnetism Question for Chloe

Question #68834
If the power of a source remains constant, by what factor does the intensity of sound change if an observer moves 4 times as far from the source. No units required.

Expert's answer
The intensity depends on distance as r^(−2). Hence, if you increase distance in 4 times, the intensity decrease in 4^2 = 16 times.

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