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+//Example 11.3, page 424
+clc
+disp('Part a')
+A=108//in g/mole
+M=10.5//in g/cm3
+D=6.02*10^23//in atom/mole
+n=(D*M)/A
+h=6.6*10^-34
+printf("\n The fermi energy is  %e electron/cm^3",n)
+m=9.1*10^-31//in kg
+n=5.9*10^28//per m^2
+x=((3*n)/(%pi))^(2/3)
+Ef=(h^2/(8*m))*x
+printf("\n The energy is  %e J",Ef)
+disp('part b')
+K=1.38*10^-23//in J-K
+T=300//in K
+z=(n*h^3)/(2*%pi*m*K*T)^(3/2)
+printf("\n The degeneracy term is  %e ",z)
+//Anser difference is because of round off