A bell emits sound energy uniformly in all directions at a rate of 4.00 × 10^-³ W. What is the intensity of the wave 100.0 m from the bell? A)3.18 × 10^-⁸ W/m² B)3.14 × 10^-⁷ W/m² C)5.02 × 10^-² W/m² D)5.02 × 10² W/m² E)6.28 × 10⁷ W/m²

Question

Quizplus · Accepted Answer

The intensity of a wave is given by the formula I = P / (4πr²), where P is the power and r is the distance from the source. Substituting the given values, I = 4.00 × 10⁻³ W / (4π(100.0 m)²) = 3.18 × 10⁻⁸ W/m².

A Bell Emits Sound Energy Uniformly in All Directions at a Rate