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Read What is Energy? (Attached) and answer the fol...




Read What is Energy? (Attached) and answer the following questions: (a) One jelly donut (JD) of energy is about 250 kilocalories or one megajoule. What is this in Btu's? In kilowatt-hours? Round off your answers approximately. (b) Suppose that you leave a 60-watt light bulb burning 24 hours a day, 365 days a year. How much electrical energy does it use in a year? Express your answer in kilowatt-hours. If electricity costs 7 cents per kWh, what is the annual cost of burning this light (just for the electricity, not including replaement bulbs)?


Paper#3979 | Written in 18-Jul-2015

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