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+//Variable declaration:
+//From example 19.5:
+Q = -4435.2                     //Heat rate with insulation (W)
+R2 = 0.00198                    //Convection thermal resistance ( C/W)
+T3 = 26                         //Surrounding air temperature ( C)
+h = 21                          //Convective heat transfer coefficient between the air and the surface (W/m^2.K)
+k = 0.0433                      //Thermal conductivity of cork board insulation (W/m.K)
+L = 0.00825                     //Required insulation thickness (m)
+
+//Calculation:
+T2 = T3+Q*R2                    //Interface temperature ( C) (part 1)
+Bi = h*L/k                      //Biot number (part 2)
+
+//Result:
+printf("1. The interface temperature is : %.2f C .",T2)
+printf("2. The Biot number is : %.0f ",Bi)
+printf("3. Theoretical part.")