Engineering, 19.01.2021 19:40 ddllww369
While completing your homework, imagine the study space you are using employs a space heater with a rating of 30 kW, a refrigerator (for snacks) that is rated for 5 kW, and a light fixture with two 100 W bulbs, all operating at a constant rate for the 1.5 h it takes you to finish.
A. What is the total power consumed at any given moment?
B. How much energy do you consume to complete the task?
C. Assume the utility company charges 6.5 cents per unit of energy in part b, how much did it cost you to complete the assignment?
D. If you were willing to pay the utility company $5, what would be the power rating of an additional appliance you could add to your study space?
Answers: 2
), measured in kilowatts, is the sum of the power of the space heater, the refrigerator and the two light bulbs:
) is the kilowatt-hour, which is obtained by multiplying the total power consumed, measured in kilowatts, by the operation time (
), measured in hours. If we know that 
, then the energy consume to complete the task is:
(1)
), measured in US dollars, is determined by multiplying the energy consumed by the unit cost (
), measured in US dollars per kilowatt-hour, That is: (
, 
(2)
, 
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While completing your homework, imagine the study space you are using employs a space heater with a...
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