The intensity of the sound wave from an airplane is 1.0 $\times$ 10² W/m² at 5.0 m.What is the intensity at 100 m? A) 0.25 W/m² B) 0.53 W/m² C) 5.0 W/m² D) 0.25 mW/m²

Question

Quizplus · Accepted Answer

The intensity of a sound wave decreases with the square of the distance from the source. Using the inverse square law: I2 = I1 * (r1/r2)^2, where I1 = 100 W/m², r1 = 5 m, r2 = 100 m, we find I2 = 100 * (5/100)² = 0.25 W/m².

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