Question

How much power does a sound source generate if the intensity is 2.4 X 10-6 W/m2 at a distance of 2.3m?

Answer 1

Given:

Intensity $I = 2.4 \times 10^{-6}$ $\frac{W}{m^{2} }$

Distance $r = 2.3$ m

To Find:

How much power does a sound source generate.

From the equation of intensity in terms of power,

   $I= \frac{P}{4\pi r^{2} }$

Where $P =$ power

  $P = I 4\pi r^{2}$

  $P = 2.4 \times 10^{-6} \times 4 \times 3.14 \times 5.29$

  $P = 1.59 \times 10^{-4}$ W

Therefore, the power generated by source is $1.59 \times 10^{-4}$ W