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OpenStudy (anonymous):
What is the energy efficiency of a light bulb that gives you 30 units of usable energy for every 100 units of energy put in to it? 0.3<--- my answer 3 30
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OpenStudy (anonymous):
@aaronq
OpenStudy (theeric):
Looks good! \(\sf\dfrac{"useful"\ energy}{input\ or\ "total" energy}=\sf energy\ efficiency\)
OpenStudy (anonymous):
30 / 100=0.3
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