//Example 31.2 m_parent=239.052157;//Atomic mass of parent nucleus (Pu 239)(u), See Appendix A m_final=235.043924+4.002603;//Final atomic mass of products of decay (U 235 and He 4)(u), See Appendix A delta_m=m_parent-m_final;//Difference in mass (u) E=delta_m*931.5;//Energy emitted in decay (MeV) //E=delta_m*c^2, but 1 u=931.5MeV/c^2 printf('Energy emitted in decay = %0.2f MeV',E) //Answer varies due to the difference in value of atomic mass of He-4 found in Appendix A and the value used in textbook //Openstax - College Physics //Download for free at http://cnx.org/content/col11406/latest