Its expectation value given by the Hamiltonian operator in quantum mechanics, it is the eigenvalue in H-hat psi equals E psi, a fact which makes it a conserved quantity.  Divided by h-bar, it gives the frequency of the time-dependent Schrodinger equation and the change in it, multiplied by delta t, must be greater than or equal to one half h-bar, according to the Heisenberg Uncertainty Principle.  For ten points, what is this scalar quantity equa
Its expectation value given by the Hamiltonian operator in quantum mechanics, it is the eigenvalue in H-hat psi equals E psi, a fact which makes it a conserved quantity.  Divided by h-bar, it gives the frequency of the time-dependent Schrodinger equation and the change in it, multiplied by delta t, must be greater than or equal to one half h-bar, according to the Heisenberg Uncertainty Principle.  For ten points, what is this scalar quantity equal to m c squared?
Its expectation value given by the Hamiltonian operator in quantum mechanics, it is the eigenvalue in H-hat psi equals E psi, a fact which makes it a conserved quantity.  
{Energy}