SOLUTION: Find the number of decibels for the power of the sound given. Round to the nearest decibel. A rocket engine, 2.53 x 10^-5watts/cm2

Algebra ->  Customizable Word Problem Solvers  -> Mixtures -> SOLUTION: Find the number of decibels for the power of the sound given. Round to the nearest decibel. A rocket engine, 2.53 x 10^-5watts/cm2       Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


   



Question 940485: Find the number of decibels for the power of the sound given. Round to the nearest decibel.
A rocket engine, 2.53 x 10^-5watts/cm2

Answer by macston(5194) About Me  (Show Source):
You can put this solution on YOUR website!
dB=10log%28I%2F10%5E-12%29, where I is intensity in watts per square meter
First convert to watts%2Fm%5E2
%282.53x10%5E-5watts%2Fcm%5E2%29%2A%28100%5E2+cm%5E2%2Fm%5E2%29=0.253watts%2Fm%5E2
Then plug in:
dB=10log%28%280.253watts%2Fm%5E2%29%2F%2810%5E-12%29%29=104 dB