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clear
//
//
//
//Variable declaration
h=6.60*10^-34; //planck's constant(J-sec)
m=1.674*10^-27; //mass of proton(kg)
lamda=10^-10; //de-broglie wavelength(m)
e=1.6*10^-19; //charge of electron(c)
//Calculations
E=h^2/(2*m*lamda^2); //energy of neutron(J)
E=E/e; //energy of neutron(eV)
//Result
printf("\n energy of neutron is %0.2f *10^-2 eV",E*10^2)
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