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+// Scilab Code Ex10.6: Page-224 (2010)
+e = 1.6e-019;   // Energy equivalent of 1 eV, J/eV
+h = 6.626e-034;    // Planck's constant, Js
+m = 9.1e-031;    // Mass of the electron, kg
+N_D = 18.1e+028;    // Number density of conduction electrons in Al, per metre cube
+E_F = h^2/(8*m)*(3/%pi*N_D)^(2/3);    // Fermi energy of aluminium, J
+Em_0 = 3/5*E_F;    // Mean energy of  the electron at 0K, J
+printf("\nThe Fermi energy of aluminium = %5.2f eV", E_F/e);
+printf("\nThe mean energy of  the electron at 0K = %4.2f eV", Em_0/e);
+
+// Result
+// The Fermi energy of aluminium = 11.70 eV
+// The mean energy of  the electron at 0K = 7.02 eV