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Write the Word or Phrase That Best Completes Each Statement D=10.0log(S/S0)\mathrm { D } = 10.0 \log \left( \mathrm { S } / \mathrm { S } _ { 0 } \right)

Question 393

Multiple Choice

Write the word or phrase that best completes each statement or answers the question.
-Use the formula D=10.0log(S/S0) \mathrm { D } = 10.0 \log \left( \mathrm { S } / \mathrm { S } _ { 0 } \right) , where the loudness of a sound in decibels is determined by S\mathrm { S } , the number of watt /m2/ \mathrm { m } ^ { 2 } produced by the soundwave, and S0=1.00×1012watt/m2\mathrm { S } _ { 0 } = 1.00 \times 10 ^ { - 12 } \mathrm { watt } / \mathrm { m } ^ { 2 } . What is the intensity in watt/ /m2/ \mathrm { m } ^ { 2 } of a noise measured at 37 decibels? (Round to the nearest tenth.)


A) 4.0×1013watt/m24.0 \times 10 ^ { 13 } \mathrm { watt } / \mathrm { m } ^ { 2 }
B) 3.7×1010watt/m23.7 \times 10 ^ { - 10 } \mathrm { watt } / \mathrm { m } ^ { 2 }
C) 5.0×108watt/m25.0 \times 10 ^ { - 8 } \mathrm { watt } / \mathrm { m } ^ { 2 }
D) 5.0×109watt/m25.0 \times 10 ^ { - 9 } \mathrm { watt } / \mathrm { m } ^ { 2 }

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