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rosie_burk
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Homework Statement
A photovoltaic cell has area 80 sq cm and efficiency converting energy in the form of sunlight to electricity of 7%. The sun's intensity is 800 W / sq m and the rays are perpendicular to the cell's surface.
What power will be produced by this cell (in W)? Take care in converting to SI units.
Homework Equations
=(intensity)(area)
The Attempt at a Solution
80*10^-2 *.07 * 800 = 44.8
but the back of the books says the answer is .45