If a sound of intensity I = 1.0  10^-⁶ W/m² falls on a detector of area A = 7.0  10^-⁵ m² about the size of your eardrum), how much power is received by the detector? A) 6.2  10^-¹⁴ W B) 1.0  10^-⁶ W C) 7.0  10^-¹¹ W D) 1.4  10^-² W E) 70 W

Question

Quizplus · Accepted Answer

The power received by the detector is calculated by multiplying the intensity (I) by the area (A): P = I * A = (1.0  10^-6 W/m²) * (7.0  10^-5 m²) = 7.0  10^-11 W.

If a Sound of Intensity I = 1