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diff --git a/2510/CH19/EX19.4/Ex19_4.sce b/2510/CH19/EX19.4/Ex19_4.sce
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+//Variable declaration:
+k = 0.022                       //Thermal conductivity of glass wool (Btu/h.ft. F)
+T1 = 400                        //Inside wall temperature ( F)
+T2 = 25                         //Outside wall temperature ( C)
+L = 3/12                        //Length of insulation cover (ft)
+
+//Calculation:
+T_2 = T2*(9/5)+32               //Outside wall temperature in fahrenheit scale ( F)
+QbyA = k*(T1-T_2)/L              //Heat flux across the wall (Btu/h.ft^2)
+
+//Result:
+printf("The heat flux across the wall is : %.1f Btu/h.ft^2 .",QbyA)