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yaser1989
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Homework Statement
Residents of Hawaii are warned of the approach of a tsunami by sirens mounted on the tops of towers. Suppose a siren produces a sound that has an intensity level of 120 dB at a distance of 2.0m.
Homework Equations
I = P / 4[tex]\pi[/tex]r[tex]^{2}[/tex]
The Attempt at a Solution
I calculated I at 2m: I = 1 w/m^2
P at 2m and 1 w/m^2 = 50.26548
I just don't know what values I should use to calculate r.