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Energy Footprint - PowerPoint PPT Presentation


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Spring 2010. 2. Electricity meter. Electricity meters read in kWh (kilowatt-hour)this is a unit of energy: power times time1 kWh is 1,000 W over 1 hr = 3,600 secondsor 1 W over 1000 hours, or 100 W over 10 hoursthus 1 kWh = 3,600,000 J (= 860 Cal)My electricity bill indicates a cost of $0.13 per kWhtry getting 860 Cal of food for $0.13lesson: eat your electricity

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