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anonymous
 5 years ago
Let i0=1.0*10^12 watt per square meter be the energy intensity of the softest sound detectable by the human ear. Let L(i)=10*log(i/i0) be the formula for the loudness of a sound, in decibels(dB), whose energy intensity is i. Find the decibel measure of the sound whose energy intensity is 8*10^4 watt per square meter.
A.80.0 dB
B.89.0 dB
C.98.0 dB
D.107.0 dB
E.116.0 dB
anonymous
 5 years ago
Let i0=1.0*10^12 watt per square meter be the energy intensity of the softest sound detectable by the human ear. Let L(i)=10*log(i/i0) be the formula for the loudness of a sound, in decibels(dB), whose energy intensity is i. Find the decibel measure of the sound whose energy intensity is 8*10^4 watt per square meter. A.80.0 dB B.89.0 dB C.98.0 dB D.107.0 dB E.116.0 dB

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Can I ask how you found that?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0L= 10log (i/i0) i = 8 * 10^4 i/i0 = 8*10^8

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0log (8*10^8) = log 8 + log 10^8 = 0.903 + 8

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Find the logarithm without using a calculator: log (radical) 100000000000 =

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0if its log to the base 10 then count the no of zeros and thats d answer
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