1. The problem statement, all variables and given/known data Suppose a spherical loudspeaker emits sound isotropically at 10 W into a room with completely absorbent walls, floor, and ceiling (an anechoic chamber). (a) What is the intensity of the sound at distance d = 3.0 m from the center of the source? (b) What is the ratio of the wave amplitude at d = 4.0 m to that at d = 3.0 m? 2. Relevant equations I = P/A I ∝ A^2 (According to my TA) 3. The attempt at a solution Part A: I = P/A I = 10/4π(3.0)^2 = 0.0884 W/m^2 Part B: According to my TA, Intensity is proportional to the amplitude squared. I was wondering if I could use this relationship to answer part B. Intensity at 3.0 m = 0.0884 W/m^2 Amplitude at 3.0 m = 0.297 m Intensity at 4.0 m = 0.0497 W/m^2 Amplitude at 4.0 m = 0.223 m Ratio: 0.223/0.297 = 0.751 Not sure if this is the correct approach or if the relationship I ∝ A^2 is correct or not.