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clear
//
//
//
//Variable declaration
m=9.11*10**-31 //mass(kg)
e=1.602*10**-19 //charge(c)
E=5.5 //fermi energy(V/m)
tow=3.97*10**-14 //relaxation time(s)
//Calculation
Vf=sqrt(2*E*e/m) //fermi velocity(m/s)
lamda=Vf*tow //mean free path(m)
//Result
printf("\n fermi velocity is %0.2f *10**6 m/s",Vf/10**6)
printf("\n mean free path is %0.2f *10**-8 m",lamda*10**8)
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