Scalar

A scalar is Any physical quantity with a field that can be described by a single numerical value at each point in space. A scalar quantity is distinguished from a vector quantity by the fact that a scalar quantity possesses only magnitude, whereas a vector quantity possesses both magnitude and direction. Thus, pressure is a scalar quantity and velocity is a vector quantity. Work is a scalar quantity – it only has magnitude.

http://amsglossary.allenpress.com/glossary/browse?s=s&p=9 http://en.wikipedia.org/wiki/Scalar_(physics) http://www.nu.ac.za/physics/1M2002/Energy%20work%20and%20power.htm

-Sam