the intensity of sound at a construction site is 0.10 W/m^2. If the area of the eardrum is 0.20 cm^2, how much sound energy is absorbed by one ear in an 8-h workday? Represent mathematically the intensity I of the sound, the area of the eardrum, and the time interval

Respuesta :

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]

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