
 Vector  Wikipedia 
  In differential geometry, physics, and engineering, the term vector usually refers quantities that are closely related to the coordinates from Euclidean space (or to tangent spaces of a differentiable manifold)—the notion of having a "magnitude" and "direction" is formalized by saying that the vector has components that transform like the coordinates under rotations. 
  Vectors can be contrasted with scalar quantities such as distance, speed, energy, time, temperature, charge, power, work, and mass, which have magnitude, but no direction (they are invariant under coordinate rotations). 
  The length or magnitude or norm of the vector a is denoted by 
 wikipedia.findthelinks.com /ve/Vector.html (1624 words) 
