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KingOfQuestions
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1. A sheet of rubber and a sheet of cardboard, each 2 mm thick, are pressed together and their outer faces are maintained respectively at 0 oC and 25 oC. If the thermal conductivities of rubber and cardboard are respectively 0.13 and 0.05 W m-1 K-1, find the quantity of heat which flows in one hour across a piece of the composite sheet of area 100 cm2. 2. I know how to solve the problem when a single object with one thermal conductivity is give, But how do I solve a problem with two different objects with two different thermal conductivities?3. I used the equation Heat conduction Q/ Time = (Thermal conductivity) x (Area) x (Thot -Tcold)/Thickness to find the Heat which flows in the rubber and the cardboard seperately but after that I was at a lost.
Please help me solve it. An explanation would be nice if possible because I don't really care about the answer I just want to know how to do it.
Thanks in Advance :)
Please help me solve it. An explanation would be nice if possible because I don't really care about the answer I just want to know how to do it.
Thanks in Advance :)