SOLUTION: THE DECIBEL LEVEL OF SOUND IS GIVEN BY D=10 LOG(I/10^-12), WHERE I IS THE SOUND INTENSITY MEASURED IN WATTS PER SQUARE METER FIND THE DECIBEL LEVEL OF A WHISPER AT AN INTENSITY OF

Algebra ->  Points-lines-and-rays -> SOLUTION: THE DECIBEL LEVEL OF SOUND IS GIVEN BY D=10 LOG(I/10^-12), WHERE I IS THE SOUND INTENSITY MEASURED IN WATTS PER SQUARE METER FIND THE DECIBEL LEVEL OF A WHISPER AT AN INTENSITY OF      Log On


   

Question 63954: THE DECIBEL LEVEL OF SOUND IS GIVEN BY D=10 LOG(I/10^-12), WHERE I IS THE SOUND INTENSITY MEASURED IN WATTS PER SQUARE METER FIND THE DECIBEL LEVEL OF A WHISPER AT AN INTENSITY OF 5.4 x 10^-10 WATTS PER SQUARE METER.
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
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THE DECIBEL LEVEL OF SOUND IS GIVEN BY D=10 LOG(I/10^-12), WHERE I IS THE SOUND INTENSITY MEASURED IN WATTS PER SQUARE METER FIND THE DECIBEL LEVEL OF A WHISPER AT AN INTENSITY OF 5.4 x 10^-10 WATTS PER SQUARE METER.
:
D = 10%2ALOG%28I%2F%2810%5E-12%29%29
:
Substitute 5.4(10^-10) for I in the above equation:
:
D = 10%2ALOG%28%285.4%2810%5E-10%29%29%2F%2810%5E-12%29%29
:
Note that %2810%5E-10%29%2F%2810%5E-12%29 = 10^2
:
So we have:
D = 10*Log(5.4*(10^2))
D = 10*Log(540)
D = 10*2.73239
D = 27.32 dbw