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Title: A second device uses twice as much chemical energy to generate half as much electric energy. What is its effic? Post by: illestchemist on Feb 13, 2013 A 46 efficient device uses chemical energy to generate 630 of electric energy.
Part A How much chemical energy is used? Express your answer using two significant figures. i found the right answer is 1400 j but the second one i got 11% wich is wrong any help with right value? A 46 % and 630 J Title: A second device uses twice as much chemical energy to generate half as much electric energy. What is its effic? Post by: lemonz on Feb 13, 2013 What are the units on 46 and 630?
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