AP Physics 2
9.4 The First Law of Thermodynamics
9.3 Thermal Energy Transfer and Equilibrium
An electric refrigerator is placed inside a sealed, thermally insulated room. The door of the refrigerator is left wide open, its power cord is plugged into a wall outlet connected to an external electrical power grid, and the appliance runs continuously for several hours. A student records the air temperature throughout the room and discovers that the average temperature steadily rises. Which of the following statements provides the correct physical explanation for this observation?
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