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Abstract: . . . expended. 4.1p: Electrical power and energy can be determined for electric circuits. Produced by the Research Foundation of the State University of New York with funding from the New York State Energy Research and Development Authority (NYSERDA) www.nyserda.org Should you have questions about this activity or suggestions for improvement, please contact Bill Peruzzi at billperuz@aol.com (STUDENT HANDOUT SECTION FOLLOWS) Allocating Energy Physical Setting, physics, physical science; Level III 27.3 . . . . . . Waffle iron Warm air furnace motor Washing machine Water bed heater Water heater Well or water pump Power (W) 1200 200 177 1100 60 75 100 20 50 1450 150 260 1350 70 12000 450 75 15 1000 200 80 300 160 300 100 1500 10 400 30 650 1200 375 375 375 4000 335 Allocating Energy 27.4 . . . . . . air furnace motor Washing machine Water bed heater Water heater Well or water pump Power (W) 1200 200 177 1100 60 75 100 20 50 1450 150 260 1350 70 12000 450 75 15 1000 200 80 300 160 300 100 1500 10 400 30 650 1200 375 375 375 4000 335 Allocating Energy 27.4 . . . . . . cumulatively store in your system? 3. How many kilowatt-hours did you draw from your local utility? 4. What changes could you make to eliminate reliance on your local utility? Allocating Energy 27.3 Number of Watts for Some Typical Home Appliances (from Energy: How Does It Impact Our Lives? ©1994 by the Research Foundation of the State University of New York on behalf of the New York Science, Technology and Society Education Project) Electric Appliance Air cleaner Air conditioner, large window . . . . . . energy produced in any given time interval is found by multiplying this rate by the interval of time. If the rate of energy production is given in kilowatts and the time interval in hours, the amount of energy is given in units of kilowatt-hours. A 2 kW photovoltaic system in New York State can be expected to produce an average of 6.5–7 kWh of electric energy per day. DEVELOP YOUR UNDERSTANDING How many kilowatt-hours of electric energy do you use per day? To find out, list the electric appliances you . . . --2488,5,249,2396,12442
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