I'm currently doing a physics project on fusion for my A2, and need to show how to work out the range of the strong nuclear force. So far I've got this delta E*delta t > h/(4*Pi) (h = plancks constant, E = exchange particle energy and t = time.) Multiply time by c to get the range. However I've got no idea what the energy of a gluon is, and have been fruitlessly scouring wikipedia and google. Anyone know?