Adisc with radius r and mass m is free to rotate on a vertical plane about an axis through point a on its rim. assume there is no friction. initially the disc is held at rest so that the centre of the disc, g, is directly above a. the disc is then released. (a) calculate the moment of inertia of the disc for rotation about point a (b) determine the size of the angular velocity when ag is horizontal.

beta is electron from nucleus

something from nucleus has changed, but charge must be same for cons of charge

a=d/t

a="triangle"v/t

explanation:

a = acceleration

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.