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October 23, 2014

Posted by **Lee Ann** on Friday, July 15, 2011 at 9:56am.

A rock concert, 5.19 10-6 watts/cm2

D= ? db

- Math -
**Max**, Friday, July 15, 2011 at 2:05pmHint: dB = 10 log (I/Io) where

I = intensity in W/m^2

Io = Threshold of hearing (use 10^-12 W/m^2)

Convert 5.19*10^-6 W/cm^2 to W/m^2 and apply the formula.

- Math -
**Anonymous**, Thursday, October 27, 2011 at 11:31amstep 1 D=log 5.19*10^-6watts/cm2/10^16

step 2 10log(5.19*10^-6*10^16)

step 3 (log5.19)=.7151673

step 4 ^16-^-6=10

step 5 log10^10=10

step 6 10(.7151+10)

Answer 107 dm

hard to explain but that should be your answer

- Math -
**Anonymous**, Friday, November 2, 2012 at 12:19amA rock concert, 5.3 x 10^6 watts/ cm^2

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