initial commit / add all books

1 files changed, 15 insertions, 0 deletions

diff --git a/3020/CH18/EX18.18/ex18_18.sce b/3020/CH18/EX18.18/ex18_18.sce
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+clc;

+clear all;

+e=1.6e-19;//charge of electron

+u=3.2e-3;//

+sigma=5.9e7;//conductivity

+ni=sigma/(u*e);//concentration of conduction electron in Cu

+disp('m^-3',ni,'concentration of conduction electron in Cu is:');

+N=6.022e23;//Avogadro's constant

+de=8900;//density

+m=63.5;//atomic mass of Cu

+ne=1e3;//no of free electrons per atom

+n=N*de*ne/m;//concentration of free electrons per Cu atom

+disp('electrons per m^3',n,'concentration of free electrons per Cu atom is:')

+avg=ni/n;//average no of electrons contributed per Cu atom

+disp('',avg,'average no of electrons contributed per Cu atom');