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,
This Is What Rock n' Roll Looks Like week, the song went up two spots, peaking at number forty-four. The following two weeks, "This Is What Rock n' Roll Looks Like" remained stationary at number forty-four on the weeks ending August 1, 2011 and August 8, 2011, respectively. A music video for "This Is What Rock n' Roll Looks Like" was shot and directed by Sanaa Hamri at Citrus College in Glendora, California. Porcelain Black discussed the idea behind the music video for "This Is What Rock n' Roll Looks Like" with AOL's Carlos Ramirez, stating it was based on real life experiences. After Porcelain Black's mother had