Respuesta :
Answer:
Power energy per second will be equal to [tex]6.4884\times 10^{-17}watt[/tex]
Explanation:
We have given radius of human eardrum r = 4.15 mm = 0.00415 m
Intensity at threshold of hearing [tex]I=1.2\times 10^{-12}w/m^2[/tex]
Area is given by [tex]A=\pi r^2=3.14\times 0.00415^2=5.407\times 10^{-5}m^2[/tex]
We know that power is given by [tex]P=I\times A=1.2\times 10^{-12}\times 5.407\times 10^{-5}=6.4884\times 10^{-17}watt[/tex]
So power energy per second will be equal to [tex]6.4884\times 10^{-17}watt[/tex]
The energy per second received by an eardrum is [tex]6.4884 \times 10^{-17} watt[/tex]
Calculation of the energy per second;
The area should be
[tex]= \pi r^2\\\\= 3.14 \times 0.00415m\\\\= 5.407 \times 10^{-5}m^2[/tex]
Now
The power should be
[tex]= 1.2 \times 10^{-12} \times 5.407 \times 10^{-5}\\\\= 6.4884 \times 10^{-17} watt[/tex]
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