\( \Delta L \;=\; \tau_n \cdot \Delta t \) (Change in Angular Momentum)
\( \tau_n \;=\; \dfrac{ \Delta L }{ \Delta t }\)
\( \Delta t \;=\; \dfrac{ \Delta L }{ \tau_n }\)
Change in angular momentum, abbreviated as \(\Delta L\), is the porportion of the average net torque and the time interval the torque is applied to.