The discussion centers on calculating the energy received by a detector from a sound intensity of I = 10-6 W/m2 over an area of A = 7 x 10-5 m2 for a duration of 30 seconds. The key formula to derive energy is E = I × A × t, where E is energy in joules, I is intensity in watts per square meter, A is area in square meters, and t is time in seconds. By substituting the given values, the energy received can be calculated definitively.
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Per forum rules, you need to show some attempt.annafagin said:Homework Statement: A sound of intensity I = 10-6 W/m2 falls on a detector of area A = 7 x 10-5 m2. (This is about the size of an eardrum.)
If the sound continues for 30 s, what is the amount of energy received in joules?
Homework Equations: I = 10-6 W/m2
I'm not sure! I'm really lost on this problem to be honest.