Question

At a distance 30 m from a jet engine, intensity of sound is 10 W/m^2. What is the intensity at a distance 180 m?

Answer 1

`I_(2)=0.27 W/m^2`

Step-by-step explanation:

Intensity is given by the expresion:

`I_(2)=Io ((r1)/(r2) )^(2)`

where:

Io = inicial intensity

r1= initial distance

r= final distance

`I_(2)=10 W/m^2 ((30m)/(180m) )^(2)`

`I_(2)=0.27 W/m^2`