After being struck by lightning, Barry Allen wakes up from his coma to discover he's been given the power of super speed, becoming the Flash, fighting crime in Central City. Greg Berlanti, Geoff Johns, Andrew Kreisberg.
vector sum, resultant-a vector that is the sum of two or more other vectors. radius vector-a line connecting a point in space to the origin of a polar coordinate system. radius vector-a line connecting a satellite to the center of the body around which it is rotating.
Definition. Parallel lines are two lines that are always the same distance apart and never touch. In order for two lines to be parallel, they must be drawn in the same plane, a perfectly flat surface like a wall or sheet of paper.