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AntiMatter
How does external torque produce angular acceleration about the center-of-mass?
\[dL/dt=r \times F\] where L is an angular momentum \[L=I \omega\] and \[I\] is moment of inertia, \[\omega\] is an angular velocity, \[\tau = r \times F\] is a torque. So, if you differentiate \[\omega\] you get angular acceleration. \[I\] is a matrix in general.
\[\tau = r \times F = I \alpha\] where \[ I \] is is moment of inertia, where \[\alpha\] is angular acceleration