waves are generated when a source of energy forces matter in a medium (solid, liquid, or gas) to vibrate. How does the study of the Earth's layers relate to the study of waves

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?

Can you match these to the correct definition

What is the magnitude of the gravitational force acting on the earth due to the sun?