A Student Is Sleeping Under a Small Goose-Down Comforter That $^{\circ}$

question 13

Multiple Choice

A student is sleeping under a small goose-down comforter that has coefficient of thermal conductivity of 0.025 W/m $^{\circ}$ C.The thickness of the down comforter is 5.0 cm and the area of the comforter is 2.0 m².If the temperature difference between inside of the comforter and the outside of the comforter 40 $^{\circ}$ C,then what is the rate of heat flow through the comforter?

• A) 10 W
• B) 20 W
• C) 30 W
• D) 40 W
• E) 50 W

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