Question

The outer walls of your house have an R-value of 88.0 K m / W, and a total area of 2000 m. Let’s assume that, from the beginning of December to the end of February, the temperature outside the house is 0°C while you set your thermostat to maintain a constant temperature of 22°C inside the house.

1.How much energy is conducted through the walls of your house in this three-month period? Assume it is not a leap year. Note that a number like 1.23 x10^6 can be entered as 1.23e6
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2.How much energy would be conducted through the walls if you lowered the thermostat so as to maintain a constant temperature of 20°C? Assume it is not a leap year. Note that a number like 1.23 x10^6 can be entered as 1.23e6
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3.Every kW-h (kilowatt-hour) of energy costs 20 cents. First, convert 1 kW-h to joules, and then determine how much money you would save by keeping your thermostat at 20°C for the three months.
$_______

Answer 1