Mass

Mass is a physical property of matter which causes it to resist change in speed and direction, and to produce gravity. It is defined by the mass parameter and denoted by $$\bar{m}$$. In pilitron physics, the total (net) mass of a system is the sum of masses of its sub-systems:


 * $$M = \sum \bar{m}$$

The amount of energy stored in mass is given by:


 * $$\bar{E} = \bar{m}c^2$$