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where <math>\gamma</math> is the [[Lorentz factor]].
where <math>\gamma</math> is the [[Lorentz factor]].
==Momentum in Quantum Mechanics==
In [[quantum mechanics]], the operator for momentum, <math>\hat p</math> is
<math>\hat p = \frac{\hbar}{i} \frac{\partial}{\partial x}</math>
==External links==
==External links==