問題詳情
19. Some properties of glass are listed here:Density: 2300 kg/m3 Specific heat: 840 J/kg•℃Coefficient of linear thermal expansion: 8.5 x 10-6 (℃)-1Thermal conductivity: 0.80 W/(m•℃)
A glass window pane is 2.7 m high, 2.4 m wide, and 2.0 mm thick. The temperature at the innersurface of the glass is 22℃ and at the outer surface 4.0℃. How much heat is lost each hour throughthe window under steady state conditions?
(A) 1.7 x 105 J
(B) 1.7 x 106 J
(C) 4.7 x 107 J
(D) 1.7 x108J
(E) 4.7 x 109 J.
參考答案
答案：D
難度：計算中-1
書單：沒有書單，新增