At a point 13.0 m from a source of spherical sound waves, you measure a sound intensity of 790 mW/m2 . How far do you need to walk, directly away from the source, until the intensity is 220 mW/m2

11.6 m

Explanation:

The intensity of sound is inversely proportional to the square of the distance from the source. If we denote intensity with I and distance with d,

This can be resolved for any two situations as

Therefore, you need to walk 24.6 - 13 m = 11.6 m away from the source.

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.

0.93xc=0.93x3x10^8m/s

2.54cm is 1 inch

360seconds i 1 hr