Asked by Becky
                How many joules of energy are required to run a 100 W light bulb for one day?  Burning coal yields about 30x10 to the 8J of energy per kilogram of coal burned. Assuming that the coal power plant is 30% efficient, how much coal has to be burned to light the bulb for one day?
            
            
        Answers
                    Answered by
            Michelle
            
    0.96 kg
    
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