You are working as a nuclear physicist and are performing research on mirror isobars. mirror isobars are pairs of nuclei for which z1 = n2 and z2 = n1 (the atomic and neutron numbers are interchanged). you wish to investigate the independence of nuclear forces on charge by comparing binding-energy measurements in the laboratory on mirror isobars against a theoretical value for the difference in binding energies. you first find the theoretical difference in binding energies for the two mirror isobars 137n and 136c. (enter the magnitude of the difference in mev.)