At what rate is heat being lost through the window by conduction? Express your a

Question

At what rate is heat being lost through the window by conduction? Express your answer using three significant figures Censtants Apenre window has dimensions of 1.40 m ×250 mand is made of glass 530 mm thick On winter day, the Odsde temperature is-19.0 while the inside temperature is a comfortable 21.0 H. 121.1321 Submit X Incorrect: Try Again: 3 attempts remaining Part B At what rate would heat be est through the window it you covered conductvity 0 0500 W/ K it with a 0.750 mm-thick layer of paper (thermal Express your answer using theee significant figures Submit Reauest Answer

Explanation / Answer

a)

The rate of heat being lost through the window by conduction is

H=KglassAdT/L =0.8*(1.4*2.5)*(21-(-19))/(5.3*10-3)

H=21132.1 W

b)

When window is covered by paper

H =AdT[(Lglass/Kglass)+(Lpaper/Kpaper)]

H=(1.4*2.5)(40)/[5.3*10-3/0.8 +0.75*10-3/0.05]

H=6474 W

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