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.
Basic Vector Definitions. A vector is a quantity that has both magnitude and direction. The magnitude is a scalar quantity, a scalar being defined as a quantity which may be completely specified by a number and perhaps a unit.nit Vectors. It is convenient to use vectors of unit length to specify the directions of vector quantities in the various coordinate systems. In cartesian coordinates it is typical to use i, j and k to represent unit vectors in the x, y and z directions respectively.