California State Polytechnic University, Pomona

Washing by hand uses 20 gallons heated to 110 degrees F. One gallon of water weighs 8 pounds. 1 BTU is the amount of energy needed to raise the temperature of one pound of water by 1 degree F. 1 kilowatt-hour = 3400 BTU. a. Calculate the total energy in BTU used to heat the water and run the electric washer to wash a load of dishes. b. ................
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