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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 2.06 × 106 J of energy in the 4.0 h, then what is its efficiency? Show all 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 2.06 × 106
J of energy in
the 4.0 h, then what is its efficiency?

Show all work

User Vesna
by
5.4k points

1 Answer

1 vote

Answer:

4.51456%

Explanation:

Efficiency equation: output/input*100%

(9.3*10^4)/(2.03*10^6)*100 = 4.51456%

User Brad Reardon
by
5.1k points
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