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A freezer has a temperature The air in the kitchen has a
Chapter , Problem 77(choose chapter or problem)
A freezer has a temperature \(T_c=-23^{\circ} \mathrm{C}\). The air in the kitchen has a temperature \(T_{\mathrm{h}}=27^{\circ} \mathrm{C}\). The freezer is not perfectly insulated, and heat leaks through the walls of the freezer at a rate of \(50 \mathrm{~W}\). Find the power of the motor that is needed to maintain the temperature in the freezer.
Questions & Answers
QUESTION:
A freezer has a temperature \(T_c=-23^{\circ} \mathrm{C}\). The air in the kitchen has a temperature \(T_{\mathrm{h}}=27^{\circ} \mathrm{C}\). The freezer is not perfectly insulated, and heat leaks through the walls of the freezer at a rate of \(50 \mathrm{~W}\). Find the power of the motor that is needed to maintain the temperature in the freezer.
ANSWER:Step 1 of 4
We have given
represents the temperature of the freezer (cold reservoir)
represents the temperature of the air in the kitchen (hot reservoir)
represents the rate at which heat leaks through the walls of the freezer.