clear;
clc;
printf("\nEx-6.19\n");
//page no.-192
//given
E=5.53;......//fermi energy in eV
e=1.6*10^-19;.....//charge
tau=3.91*10^-14;..//relaxation time in s
m=9.11*10^-31;....//mass of electron

v=((2*E*e)/m)^(1/2).......//fermi velocity

printf("\nfermi velocity is 1.39*10^6 m/s\n");

k=1.38*10^-23;......//boltzmann constant

T=(E*e)/k..............//fermi temperature in kelvin

printf("\nfermi temperature is 6.41*10^4 k");