Physics, 18.08.2020 14:01 victoriadenning1

A 150 W driveway light produces 9.3 × 104 J of light energy over a 4.0 h period. If the light uses 2.06 × 106 J of energy in the 4.0 h, then what is its efficiency? Show all your work.

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A 150 W driveway light produces 9.3 × 104 J of light energy over a 4.0 h period. If the light uses 2...

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