Solve the Problem $L = 10 \cdot \log \frac { \mathrm { I } } { \mathrm { I } }$

question 93

Multiple Choice

Solve the problem.
-Use the formula $L = 10 \cdot \log \frac { \mathrm { I } } { \mathrm { I } }$ , where the loudness of a sound in decibels is determined by I, the number of watts per square meter produced by the sound wave, and I $0 = 10 ^ { - 12 }$ watts per square meter. What is the intensity of a noise measured at $56 \mathrm { db }$ ?

• A) \(2.7 \times 10 ^ { 14 }\) watts per square meter
• B) \(3.98 \times 10 ^ { - 7 }\) watts per square meter
• C) \(3.98 \times 10 ^ { - 6 }\) watts per square meter
• D) \(5.6 \times 10 ^ { - 10 }\) watts per square meter

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