A certain loudspeaker system emits sound isotropically with frequency of 2000 Hz and an intensity of 1.0 mW/m^2 at a distance of 6.0 m. Assume that there are no reflections, (a) What is the intensity at 30.0 m? At 6.10 m, what are (b) the displacement amplitude and (a) What is the intensity at 30.0 [...]