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clear
//
//
//
//Variable declaration
d=970 //density(kg/m**3)
Na=6.02*10**26 //avagadro number
w=23 //atomic weight
m=9.1*10**-31 //mass(kg)
h=6.62*10**-34 //planck's constant
//Calculation
N=d*Na/w //number of atoms/m**3
x=h**2/(8*m)
y=(3*N/%pi)**(2/3)
EF=x*y //fermi energy(J)
//Result
printf("\n fermi energy is %0.2f eV",EF/(1.6*10**-19))
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