Solve the Problem $1.49 \times 10 ^ { - 5 } \mathrm { Watts } / \mathrm { m } ^ { 2 }$

question 346

Multiple Choice

Solve the problem.
-A certain noise produces $1.49 \times 10 ^ { - 5 } \mathrm { Watts } / \mathrm { m } ^ { 2 }$ of power. What is the decibel level of this noise? The level of sound intensity in decibels $( \mathrm { dB } )$ is $\beta = 10 \log \left( \mathrm { I } / \mathrm { I } _ { 0 } \right)$ , where $\beta$ (beta) is the number of decibels, I is the sound intensity in $\mathrm { W } / \mathrm { m } ^ { 2 }$ , and $\mathrm { I } _ { 0 } = 10 ^ { - 12 } \mathrm {~W} / \mathrm { m } ^ { 2 }$ . (Round to the nearest decibel.)

• A) 165 decibels
• B) 62 decibels
• C) 72 decibels
• D) 7 decibels