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//Chapter 11 : Free Electron Theory Of Metals
clear;
//Variable declaration
sigma=6.8*10**7 //conductivity
n=8.5*10**28 //number of electrons
m=9.1*10**-31 //Mass of electron
e=1.6*10**-19 //charge on electron
k=1.38*10**-23 //Boltzmann's constant in J/K
T=300 //temperature in K
//Calculations
lamda=(2*sigma*sqrt(3*m*k*T))/(n*e**2)/10**-9
//Result
mprintf("Mean free path for electron= %1.1f*10**-9 m",lamda)
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