A certain radiator wall is made of copper with a
Chapter , Problem 7.47(choose chapter or problem)
A certain radiator wall is made of copper with a conductivity \(k=47 \ \mathrm{lb} / \mathrm{sec}-{ }^{\circ} \mathrm{F}\) at \(212^{\circ} \mathrm{F}\). The wall is 3/16 in. thick and has circulating water on one side with a convection coefficient \(h_{1}=85 \ \mathrm{lb} / \mathrm{sec}-\mathrm{ft}-{ }^{\circ} \mathrm{F}\). A fan blows air over the other side, which has a convection coefficient \(h_{2}=15 \ \mathrm{lb} / \mathrm{sec}-\mathrm{ft}-{ }^{\circ} \mathrm{F}\). Find the thermal resistance of the radiator on a square foot basis.
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