Global heating trend on Earth, the atmosphere expands and the length of the day increases very slightly. Explain why the length of day increases

Aperson stands on a platform, initially at rest, that can rotate freely without friction. the moment of inertia of the person plus the platform is ip. the person holds a spinning bicycle wheel with its axis horizontal. the wheel has moment of inertia iw and angular velocity ωw. take the ωw direction counterclockwise when viewed from above. part a what will be the angular velocity ωp of the platform if the person moves the axis of the wheel so that it points vertically upward?

How do we measure or think of speed in the united states?

The energy produced as a result of this flow of electrons from atom to atom is called