Solve the Problem $$D = 10 \cdot \log \left( I \times 10 ^ { 12 } \right)$$

question 232

Multiple Choice

Solve the problem.
-The level of a sound in decibels is calculated using the formula
$$D = 10 \cdot \log \left( I \times 10 ^ { 12 } \right)$$
where $I$ is the intensity of the sound waves in watts per square meter. A electric shaver puts out $0.0001$ watt per square meter. How many decibels is that?

• A) \(- 40\)
• B) 8
• C) 800
• D) 80

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