Consider a physical system whose hamiltonian h and an operator a are given by 5 0 0 0 0 2 0 2 0 -2 0 0 1 0 a ao h e 0 1 where eo has the dimensions of energy (a) do h and a commute? if yes, give a basis of eigenvectors (b) which among the sets of operators h), {a}, {h, a), {i2, â) form a complete set of commuting operators (csco)? mon to h and a. com q18 show that the momentum and the total energy can be measured simultaneously only when the potential is constant everywhere.