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diff --git a/1085/CH5/EX5.3/ex5_3.sce b/1085/CH5/EX5.3/ex5_3.sce
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+//Exam:5.3
+clc;
+clear;
+close;
+T=300;//Temperature(in Kelevin)
+t=2*10^-14;//time(in sec)
+V_c=8.9;//volume of 63.54gm of copper(in cc)
+Aw_c=63.54;//Atomic weight of copper(in a.m.u)
+e=1.6*10^(-19);
+m=9.1*10^-31;
+N_a=6.023*10^23;//avogadro's number
+n=(N_a/(Aw_c/V_c))*10^6;//Number of electrons per m^3
+conductivity=(e^2)*n*t/m;//conductivity of copper at 300K(in mho/m)
+disp(conductivity,'conductivity of copper at 300K(in mho/m)=');
+\ No newline at end of file