Finding the time-derivative of the expectation value of this quantity gives Ehrenfest's theorem. InLagrangian mechanics, cyclic coordinates can be use
Finding the time-derivative of the expectation value of this quantity gives Ehrenfest's theorem. InLagrangian mechanics, cyclic coordinates can be used if the generalized form of this quantity isinvariant. A relativistic form of this quantity has one component equal to E over c and the otherthree equal to the classical components. This quantity is conserved due to the Lagrangian'stranslational invariance according to (*) Noether's theorem. This quantity divides Planck's constant tofind de Broglie wavelength. The change in this quantity is equal to the impulse. This quantity is conservedin both elastic and inelastic collision. For 10 points, name this quantity equal to mass times velocity.
Finding the time-derivative of the expectation value of this quantity gives Ehrenfest's theorem.
linear momentum [accept p]