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clear
//
//
//
//Variable declaration
e=1.6*10^-19; //charge(coulomb)
m=9*10^-31; //mass(kg)
h=6.62*10^-34; //plank's constant(Js)
rho=970; //density(kg/m^3)
N0=6.02*10^26; //avagadro number
A=23; //atomic weight
//Calculations
n=rho*N0/A; //concentration(electrons/m^3)
ef=(h^2/(8*m))*(3*n/%pi)^(2/3); //fermi energy(J)
ef=ef/e; //fermi energy(eV)
//Result
printf("\n fermi energy is %0.3f eV",ef)
printf("\n answer varies due to rounding off errors")
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