HAMILTONIAN MOMENT In physics is the torque or rotation power generated by a load applied at a distance of a point through an axis or arm that connects them. The product of distance by weight is the moment, and is measured in gr/sec or Kg/sec . When the force causes a rotation of the arm, we talk about ANGULAR MOVEMENT and it is measured in erg/sec . Now, when we move on to molecular physics and quantum physics we have the need to measure a moment similar to that of classical physics, but related to the spin and orbit of particles. There is a total angular momentum, signified by J, an angular orbital moment signed by L, and an angular spin moment, denoted with S. The angular momentum, also called THE HAMILTONIAN MOVEMENT, is sometimes confused as it is used for both the total moment and the orbital. The Hamiltonian mechanics differ from the Lagrange approach in that the equations of movement are given by a system of ordinary first-order differential equations, which are written based on an H (Hamiltonian) function ( H-Total Energy, i.e. Ec Ep ) Lagrange equations are more complex, since they are second-order differentials.