Measure the length, in millimeters, from the center of one marble to the center of the CD wheel converter. This number represents the distance from the distributed mass to the axis of rotation.

The poles are where the planet's surface intersects with its axis of rotation — the invisible line running through the center of Earth's mass, which it spins around.

In the case of the dam, the moment of Earth’s inertia depends on its mass (water) and the distribution of that mass relative to the axis of rotation (i.e., the relocation of the water from other ...

The longer the distance of a mass to its axis of rotation, the slower it will spin. You may not know it, but you see examples of this in everyday life. For example, ...