A sheet of rubber and a sheet of cardboard, each 5 mm thick are pressed together and their outer faces are maintained respectively at 0°C and 18°C. If the thermal conductivities of rubber and cardboard are respectively 0.13 and 0.05 "Wm"^(-1) "K"^(-1). find the quantity of heat which flows in one hour across a piece of composite sheer if area is 100 "cm"^(-2).

A sheet of rubber and a sheet of cardboard, each 5 mm thick are presse

1.	A sheet of rubber and a sheet of cardboard, each 5 mm thick are pressed together and their outer faces are maintained respectively at 0°C and 18°C. If the thermal conductivities of rubber and cardboard are respectively 0.13 and 0.05 "Wm"^(-1) "K"^(-1). find the quantity of heat which flows in one hour across a piece of composite sheer if area is 100 "cm"^(-2).
Answer» ANSWER :4680 J