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A 4-kW resistance heater in a water heater runs for 2
Chapter 1, Problem 32P(choose chapter or problem)
QUESTION:
A 4-kW resistance heater in a water heater runs for 2 hours to raise the water temperature to the desired level. Determine the amount of electric energy used in both kWh and kJ.
Questions & Answers
QUESTION:
A 4-kW resistance heater in a water heater runs for 2 hours to raise the water temperature to the desired level. Determine the amount of electric energy used in both kWh and kJ.
ANSWER:Step 1 of 2
We know that power is equal to work per unit time
P =
P = Power in watts
W = Work done in joules
t = time
W = P t
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