PhysicsEasy148×since 2002Q7947Potential energy as a function of r is given by U=Ar10−Br5U = {A \over {{r^{10}}}} - {B \over {{r^5}}}U=r10A−r5B, where r is the interatomic distance, A and B are positive constants. The equilibrium distance between the two atoms will be :A(AB)15{\left( {{A \over B}} \right)^{{1 \over 5}}}(BA)51B(BA)15{\left( {{B \over A}} \right)^{{1 \over 5}}}(AB)51C(2AB)15{\left( {{2A \over B}} \right)^{{1 \over 5}}}(B2A)51D(B2A)15{\left( {{B \over 2A}} \right)^{{1 \over 5}}}(2AB)51Check answerSkip