Mass in special relativity (including the kinetic energy of the gas) only when it is measured in the center of momentum frame. Just as is the case for single particles, the calculated "rest mass" of such a container of gas does not change when it is in motion, although its "relativistic mass" does change. The container may even be subjected to a force which gives it an overall velocity, or else (equivalently) it may be viewed from an inertial frame in which it has an overall velocity (that is, technically, a frame in which its center of mass has a velocity). In this case,
Gregangelo’s Velocity Circus/Arts and Entertainment physics into the themes and titles of his choreographed performances. Herrera became aware of the Big Bang theory in the 1990s; in 1992 scientists witnessed through a telescope what they thought was a universe coming into existence. Obsessed with the Big Bang theory, Herrera wanted a company name that described the force of everything that exists in the universe. Thus, Herrera thought the equation for velocity (velocity equals distance over time) fit the kinetic nature of circus arts, performance arts, and the arts in general. Finding that art comes into existence through movement is very characteristic of the traditional Whirling