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Logarithms and Intensity-HELP !

  • Thread starter yoshiba
  • Start date
7
0
Logarithms and Intensity---HELP ASAP!

1. Homework Statement
a)What is the intensity of sound at 123 dB?

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



2. Homework Equations

something with logarithms??



3. The Attempt at a Solution

a) 10^123
 

Answers and Replies

mgb_phys
Science Advisor
Homework Helper
7,744
11
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)
 
7
0
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?
 

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