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//Example 7_1_u2
clc();
clear;
//To calculate the mean free path and mean free time
mn=0.26*0.91*10^-30 //units in Kgs
un=1000*10^-4 //units in cm^2 V^-1 s^-1
e=1.6*10^-19 //units in coulombs
tc=(mn*un)/e //units in s
tc1=tc*10^12 //units in ps
printf("The mean free time is %.3fps",tc1)
vth=10^7
meanfreepath=vth*tc*10^7 //units in nm
printf("\nThe mean free path is given by L=%.1f nm",meanfreepath)
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