Proper velocity by Hermann Minkowski's flat-space metric equation . Here a reference map frame of yardsticks and synchronized clocks define map position x and map time "t" respectively, and the "d" preceding a coordinate means infinitesimal change. A bit of manipulation allows one to show that proper velocity where as usual coordinate velocity . Thus finite "w" ensures that "v" is less than lightspeed "c". By grouping "γ" with v in the expression for relativistic momentum p, proper velocity also extends the Newtonian form of momentum as mass times velocity to high speeds without a need for relativistic mass. The proper velocity
This Is What Rock n' Roll Looks Like their real names, Alaina Beaton and Dwayne Carter, Jr. respectively. After being introduced to Lil Wayne's manager, Derrick "EI" Lawrence, by producer RedOne, Porcelain Black stated that she met Lil Wayne in New York City when he heard "This Is What Rock n' Roll Looks Like", where he expressed an interest in adding his vocals to the song. The single cover for "This Is What Rock n' Roll Looks Like" was revealed on March 21, 2011, alongside a snippet of the song. "This Is What Rock n' Roll Looks Like" was released digitally through the United States iTunes Store on