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In a typical unclear reaction, e.g. ""...

In a typical unclear reaction, e.g.
`""_(1)^(2)H+""_(1)^(2)H to ""_(2)^(3)He + n +3.27 Me V`,
although number of nucleons is conserved is conserved, yet energy is released. How ? Explain.
(b) Show that nuclear density in a given nucleus is independent of mass number A.

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