Multiple Choice
A particular lightbulb produces 8 J of thermal energy while producing 2 J of radiant energy, and this is its entire energy output during this time. How energy- efficient is this bulb [as a producer of light]?
A) 80%
B) 500%
C) 20%
D) 400%
E) 25%
Correct Answer:
Verified
Correct Answer:
Verified
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