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In the bets decay of Na^(24), the combin...

In the bets decay of `Na^(24)`, the combined electron neutrino momentum has a magnitude equal to `4MeV//c.`What is the recoil energy of daughter nucleus , given that its mass `23.99u`? Take `c=3xx10^(8)m//s` and `1u=1.66xx10^(-27)kg`.

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