The Lagrangian takes this value when the potential and kinetic energies are equal.
Holonomic constraints take a function of the position variables and the time and set it equal to this number. In special relativity, the center-of-mass frame has the property that the total momentum takes this value. The Lagrangian takes this value when the potential and kinetic energies are equal. For a reversible process, the integral of d Q -over- T  equals this value, which is also the internal (*)  resistance of an ideal ammeter. The statement that if two bodies are in thermal equilibrium with a third, then they're all in equilibrium, is given this number. Gauss's law can be used to show that the electric field inside a conductor takes on this value. For 10 points, name this value, which also names a temperature at which all thermal motion stops.
Holonomic constraints take a function of the position variables and the time and set it equal to this number.
zero