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//Variable declaration
e=1.6*10**-19;
RH=3.66*10**-4; //hall coefficient(m**3/coulomb)
sigma=112; //conductivity(ohm-1 m-1)
//Calculation
ne=3*%pi/(8*RH*e); //charge carrier density(per m**3)
mew_e=sigma/(e*ne); //electron mobility(m**2/Vs)
//Result
printf('charge carrier density is %0.3f *10**22 per m**3 \n',int(ne/10**22))
printf('electron mobility is %0.3f m**2/Vs \n',(mew_e))
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