PLEASE HELP Particles or energy given off in a nuclear reaction are called .

A. magnetism
B. heat
C. gravity
D. radiation

An object has a weight of 500 on earth what is the mass of this object

Describe the function of the endomembrane system? what organelles are involved?

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?