A Swimming Pool Heater Has to Be Able to Raise $\degree$

question 80

Multiple Choice

A swimming pool heater has to be able to raise the temperature of the 30,000 gallons of water in the pool by 10.0 $\degree$ C. How many kilowatt-hours of energy are required? (One gallon of water has a mass of approximately 3.79 kg and the specific heat of water is 4186 J/kg · $\degree$ C.)

• A) 1960 kWh
• B) 1320 kWh
• C) 1130 kWh
• D) 216 kWh

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Definitions:

Economies of Scale

Cost advantages that enterprises obtain due to their scale of operation, with cost per unit of output decreasing with increasing scale.

Average Cost Curve

A graphical representation that illustrates the cost per unit of output at different levels of production.

Long-run

A period in economics where all factors of production can be varied, and there are no fixed inputs, allowing full adjustment to changes.