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clear//
//Variables
n = 5.8 * 10**28 //number of free electrons (in per cubic-meter)
p = 1.54 * 10**-8 //resistivity (in ohm-meter)
q = 1.6 * 10**-19 //charge (in Coulomb)
m = 9.1 * 10**-31 //mass of electron (in kg)
//Calculation
sig = 1/p //conductivity (in siemen per meter)
mu = sig /(q * n) //mobility (in meter-square/volt-second)
t = mu * m / q //time (in second)
//Result
printf("\n Mobility of electrons is %0.6f m**2/V-s.\nRelaxation time is %0.6f ps.",mu,t*10**12)
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