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E0 = 1/(36*%pi*10^9); //permitivity in free space
k = 4*%pi*E0 ;
q1 = 1; // charge on the first particle in coulombs
q2 = 1; // charge on the second particle in coulombs
d = 1; // distance between the particles in meter
F = (q1*q2)/(k*d^2); //force between the two particles in newtons
disp(F, "force in free space between the two particles is in Newtons is:")
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