Answer:
0.058 J
Explanation:
The power of the sound is given by
[tex]P=AI[/tex]
where A is the area and I is the intensity.
Energy is given by
[tex]E = P\cdot t[/tex]
where t is the time.
(All units are SI units)
Hence,
[tex]E = AIt[/tex]
[tex]E = (0.20\times 10^{-4}\ \text{m}^2)(0.10\ \text{W/m}^2)(8\times60\times60\ \text{s}) = 0.058\ \text{J}[/tex]