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diff --git a/1943/CH5/EX5.2/Ex5_2.sce b/1943/CH5/EX5.2/Ex5_2.sce
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+
+clc
+clear
+//Input data
+d=427*10^-6;//The mean particle size in m
+pg=1.21;//The density of air in kg/m^3
+v=1.82*10^-5;//The viscosity of air in kg/ms
+pl=1620;//The density of the loosely packed bed in kg/m^3
+ps=2780;//The density of the solids in kg/m^3
+c1=27.2;//(Grace,1982)constant value.
+c2=0.0408;//(Grace,1982)constant value
+g=9.812;//Gravitational forc constant in m/s^2
+
+//Calculations
+E=1-(pl/ps);//The voidage of the bed
+Ar=[(pg)*(ps-pg)*g*(d^3)]/v^2;//Archimedes number
+Re=[c1^2+(c2*Ar)]^(0.5)-c1;//Reynolds number
+Umf=Re*v/(pg*d);//Minimum superficial velocity in m/s
+
+//Output
+printf('(a) The voidage of the bed = %3.3f \n (b) The minimum fluidization velocity Umf = %3.3f m/s ',E,Umf)