Homework Help: Physical Science

Posted by Raven on Sunday, October 17, 2010 at 5:38pm.

Julia and Wayne heat their house during the winter with an electric heater. The thermostat on the heater is set to 20 °C and the thermostat is cycling on and off as it keeps the room temperature stable. Julia walks out of the room leaving the light on. Wayne tells Julia that she is wasting electricity. Julia says that she’s not.

Physical Science - bobpursley, Sunday, October 17, 2010 at 5:44pm
She is probably not, as the energy in the light bulb is just adding to the heat in the room, causing the heater to cycle on less often.

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