Electric water heater is at an average temperature
Electric water heater is at an average temperature/Mechanical Engineering
Your roommate takes a very long shower, until the water in your 40-gallon electric water heater is at an average temperature of 70 F. The water heater has a rating of 12.5 kW.
- a) Assuming no additional water flows from the tank, how long will it take for the water temperature to rise to 120 F?
- b) If electricity costs $0.07/kWh, how much will it cost to raise the temperature of the water from 70 to 120 F?
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