How much energy in MeV would be released if all the mass from a 14 u particle was completely converted into energy?

The primary decay mode for the negative pion isπ− → μ− + ν - μ . What is the energy release in MeV in this decay?

Suppose that our Sun, of mass 1.99 x 1030 kg, consists entirely of hydrogen and that the dominant energy-releasing fusion reaction 4 H He 2e+ + 2v + y involves the "burning" of hydrogen into helium with a Q-value of 26.73 MeV. If the total power output of the Sun is assumed to remain constant at 3.9 x 1026 W, estimate the number of years for all of the hydrogen to be used up.

An atom of 239Pu decays into 235U and an alpha particle. How much energy (in MeV) is released due to the decay?

A proton of energy 25 MeV is moving in Pb. How much energy does it lose in a collision with an alpha particle? How many collisions are required to completely stop it?

Each fusion reaction of deuterium (2H) and tritium (3H) releases about 20.0 MeV. The molar mass of tritium is approximately 3.02 g.   What mass m of tritium is needed to create 1012 J of energy, the same as that released by exploding 250 tons of TNT? Assume that an endless supply of deuterium is available.