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You Are Trying to Decide What the Change in Heat ×\times

Question 49

Multiple Choice

You are trying to decide what the change in heat loss would be if you put a 100 cm ×\times 150 cm and 5-mm thick glass window in an outside wall.The thickness of the wall is 15 cm.If the thermal conductivities of the glass and wall are 0.90 W/m·K and 0.15 W/m·K respectively,calculate the difference in heat loss through thermal conductivity with and without the window when the outside temperature is -10 \circ C and the inside temperature is 15 \circ C.


A) 1.34 ×\times 103 J/s
B) 6.7 ×\times 103 J/s
C) 5.53 ×\times 103 J/s
D) 6.75 ×\times 103 J/s
E) none of the above

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