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// Ex13_2 Page:258 (2014)
clc;clear;
mu_0 = 4*%pi*1e-007; // Magnetic permeability, T-m/A
e = 1.6e-019; // Charge on an electron, C
m = 9.1e-031; // Mass of an electron, kg
Z = 2; // Atomic number of He
N = 28e+026; // Number of He atoms per unit volume of the sample, per metre-cube
r_bar = 0.6e-010; // Mean radius of He atom, m
chi_dia = -mu_0*Z*e^2*N*r_bar^2/(6*m); // Diamagnetic susceptibility of He
printf("\nThe diamagnetic susceptibility of He = %5.3e", chi_dia);
// Result
// The diamagnetic susceptibility of He = -1.188e-007
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