2. Moments of Inertia
Calculate the moments of inertia for the following four objects:
a) A thin rod of mass $m$ and length $l$, rotating around the axis which passes through its center
and is perpendicular to the rod.
b) A thin, solid disk of radius $r$ and mass $m$, rotating around the $z$ axis.
c) A solid ball of mass $m$ and radius $R$, rotating around an axis which passes through the center.
d) A diatomic molecule, with atoms $m_1$ and $m_2$ at a distance $d$ from each other, rotating around
the axis which passes through the molecule's center of mass and is perpendicular to the direction
of the molecule. Express the result by $d$ and treat the molecules as point masses.