An object is initially at rest, and then it breaks apart into two pieces through an explosion. One of the parts has twice the velocity of the other one (opposite directions). What is the ratio of their masses

Protons and neutrons are found within the nucleus of an atom

Zeros that follow non-zeros numbers and are also to the right of a decimal point are significant

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?