The Inside of a House Is at 20°C on an Early

question 13

Multiple Choice

The inside of a house is at 20°C on an early morning when the temperature outside is 15°C.The next morning the inside temperature is the same,but the outside temperature is now 5°C.How much does the energy per unit time lost by conduction through the walls,windows,doors,etc. ,change for the house from the first morning to the second one.

• A) Since the inside temperature stays the same,the loss is the same both days.
• B) The loss reduces to 1/3.
• C) The loss triples.
• D) The loss increases by 5/278 since we need to use the Kelvin scale for this calculation.

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