The sound intensity from a jack hammer breaking concrete is 2.0w/m2 at a distance of 2.0 m from the point of impact. this is sufficiently loud to cause permanent hearing damage if the operator doesn't wear ear protection. what are (a) the sound intensity and (b) the sound intensity level for a person watching from 50 m away?

(a)

(b)

Explanation:

Given data

Distance r₁=50 m

Distance r₂=2 m

Intensity I₂=2.0 W/m²

To find

(a) The Sound Intensity I₁

(b) The Sound Intensity level β

Solution

For (a) the Sound Intensity I₁

For (b) the Sound Intensity level β

The Sound Intensity level β is calculated as follow

i think it’s a. this is because if they measured the mass of something with a mass of 150g, then their final answer would have to be approximately 150g. though all of their answers are almost 150, rosa and tran have the closest answers (or the exact answer) to the accurate one.