Question 827240: The intensity of a certain noise is 5.68. How loud, in decibels, is this sound level? Use the formula D=10log (I/I0) where I0=10^-16W/cm^2. ROund to the nearest decibel.
I worked this solution out, and got the completely wrong answer, I got -16 where the correct answer is 168. I am really struggling with these. Please Help.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! The intensity of a certain noise is 5.68. How loud, in decibels, is this sound level? Use the formula D=10log (I/Io) where Io=10^-16W/cm^2. Round to the nearest decibel.
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D = 10 log[5.68/10^(-16)]
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= 10[log(5.68)-log(10^-16)]
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= 10[0.7543 - (-16)]
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= 10[16.7543]
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= 167.543
= 168 when rounded up
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Cheers,
Stan H.
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