What Is the Intensity of Sound at 123 dB?

[yoshiba]

Logarithms and Intensity---HELP ASAP!

Homework Statement

a)What is the intensity of sound at 123 dB?

b)Compare it to that of a whisper at 20 dB.

Homework Equations

something with logarithms??

The Attempt at a Solution

a) 10^123

 

[mgb_phys]

Inensity is equivalent to power and so the ratio of power is
L = 10* log * (P1/P0)

Where Log is the base 10 log ( labbled Log on your calculator)

 

[yoshiba]

so for a) I would do:
123=10*log*(P1/P0)
10^123=(P1/P0)^10
(10^123)^(1/10)=(P1/P0)

is that correct?