Editing Physical quantity (section)

== Support ==

=== Scalars ===
{{main|Scalar (physics)}}

A [[Scalar (physics)|''scalar'']] is a physical quantity that has magnitude but no direction. Symbols for physical quantities are usually chosen to be a single letter of the [[Latin alphabet|Latin]] or [[Greek alphabet]], and are printed in italic type.

=== Vectors ===
{{main|Vector quantity}}

[[Vector (mathematics and physics)|''Vectors'']] are physical quantities that possess both magnitude and direction and whose operations obey the [[axioms]] of a [[vector space]]. Symbols for physical quantities that are vectors are in bold type, underlined or with an arrow above. For example, if ''u'' is the speed of a particle, then the straightforward notations for its velocity are '''u''', <u>u</u>, or <math>\vec{u}</math>.

=== Tensors ===
{{main category|Tensor physical quantities}}

Scalar and vector quantities are the simplest '''tensor quantities''', which are [[tensor]]s that can be used to describe more general physical properties. For example, the [[Cauchy stress tensor]] possesses magnitude, direction, and orientation qualities.