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Solve the Problem m2\mathrm { m } ^ { 2 }

Question 227

Multiple Choice

Solve the problem.
-What is the intensity in Watts/ m2\mathrm { m } ^ { 2 } of a noise measured at 66 decibels? The level of sound intensity in decibels (dB) ( \mathrm { dB } ) is β=10log(I/I0) \beta = 10 \log \left( \mathrm { I } / \mathrm { I } _ { 0 } \right) , where β\beta (beta) is the number of decibels, I\mathrm { I } is the sound intensity in W/m2\mathrm { W } / \mathrm { m } ^ { 2 } , and I0=\mathrm { I } _ { 0 } = 1012 W/m210 ^ { - 12 } \mathrm {~W} / \mathrm { m } ^ { 2 } . (Round to the nearest hundredth.)


A) 3.98×106 W/m23.98 \times 10 ^ { - 6 } \mathrm {~W} / \mathrm { m } ^ { 2 }
B) 6.60×1010 W/m26.60 \times 10 ^ { - 10 } \mathrm {~W} / \mathrm { m } ^ { 2 }
C) 7.35×1014 W/m27.35 \times 10 ^ { 14 } \mathrm {~W} / \mathrm { m } ^ { 2 }
D) 3.98×105 W/m23.98 \times 10 ^ { - 5 } \mathrm {~W} / \mathrm { m } ^ { 2 }

Correct Answer:

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