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clear
//
//
//
//Variable declaration
epsilon0=8.84*10**-12
R=0.55*10**-10 //radius(m)
N=2.7*10**25 //number of atoms
//Calculation
alpha_e=4*%pi*epsilon0*R**3 //polarisability of He(farad m**2)
epsilonr=1+(N*alpha_e/epsilon0) //relative permittivity
//Result
printf("\n polarisability of He is %0.3f *10**-40 farad m**2",alpha_e*10**40)
printf("\n relative permittivity is %0.6f ",epsilonr)
printf("\n answer varies due to rounding off errors")
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