The Inside Temperature of a House Is 65 °F

The inside temperature of a house is 65 °F. When the temperature outside the house is 35 °F, the furnace supplies 100 joules per hour to keep the inside of the house warm. If the temperature outside the house increases to 50 °F, then what is the fuel consumption of the furnace? Assume the house loses heat through conduction only.

A) 38 joules per hour
B) 42 joules per hour
C) 50 joules per hour
D) 56 joules per hour
E) 61 joules per hour

Correct Answer:

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