Posted by **allen** on Saturday, June 21, 2014 at 4:57pm.

A sound registers 77.9 decibels on a detector. What is the intensity in W/m2? Assume the threshold of human hearing is 1.0×10-12 W/m2. Give your answer in picowatts/m2.

1 pW = 1×10-12 W/m2

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