Find the number of decibels for the power of the sound given. Round to the nearest decibel.

Question

A rocket engine,
2.42 cross 10−5
watts/cm2

Answer 1

I = 2.42*10^-5 watts/cm^2 = Intensity.
Io = 1*10^-16 watts/cm2 = Reference.

db = 10*Log(I/Io)
db = 10*Log(2.42*10^-5/1*10^-16)
db = 10*Log(2.42*10^11) = 114.