Two light nuclei of masses m1 and m2 are fused to form a more stable nucleus of mass m3 then :-
When two nuclei of masses m1 and m2 are fused to form a stable nucleus of mass m3 and some of the mass is converted in energy.
Therefore,
m3<m1+m2
Three solids of masses m1, m2 and m3 are connected with weightless string in succession and are placed on a frictionless table. If the mass m3 is dragged with a force T, the tension in the string between m2 and m3 is