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A solid cylinder of mass, $m$, and radius, $r$, when rotating at an angular velocity, $\omega$ has an angular momentum $L$.
Which of the following would double the angular momentum of the cylinder?
Doubling the mass of the cylinder while halving its angular velocity
Doubling the angular velocity of the cylinder while halving its mass
Doubling the radius while halving the mass of the cylinder
Quadrupling the mass while halving the radius of the cylinder
Quadrupling the angular velocity while halving the radius of the cylinder