Which statement is TRUE? A)Energy can be created or destroyed.
B)Electrical energy is created from other forms of energy.
C)Energy in a battery makes new energy called electrical energy.
D)Stored energy in a battery can be transformed into electrical energy.

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?