If a Sound of Intensity I = 1 $\times$ 10^-5 M² (About the Size of Your Eardrum),how Much Power

question 79

Multiple Choice

If a sound of intensity I = 1.0  10^-6 W/m² falls on a detector of area A = 7.0 $\times$ 10^-5 m² (about the size of your eardrum) ,how much power is received by the detector?

• A)6.2 \(\times\) 10^-14 W
• B)1.0 \(\times\) 10^-6 W
• C)7.0 \(\times\) 10^-11 W
• D)1.4 \(\times\) 10^-2 W
• E)70 W

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