1. Symbols for physical quantities

2. ISQ base quantities NameSymbol for quantity Symbol for dimension SI base unit Lenght l Lmeter Time t TSecond Mass m Mkilogram Electric current l lampere Thermodynamic temperature T θkelvin Amount of substance n Nmole Luminous intensity lv Jcandela

3. Definitions and properties A vector space is defined as a set of vectors, a set of scalars, and a scalar multiplication operation that takes a scalar k and a vector v to another vector kv. For example, in a coordinate, the scalar multiplication yields. In a (linear) function space,kƒ is the function x k(ƒ(x)). The scalars can be taken from any field, including the rational algebraic, real, and complex numbers, as well as finite fields.

4. Scalar In physics, a scalar is a simple physical quantity that is not changed by coordinate system rotations or translations (in Newtonian mechanics), or by Lorentz transformations or space-time translations. Contrast to vector.

5. Vector In abstract vector spaces, the length of the arrow depends on a dimensionless scale.

6. Vector components For example, an axial component of a vector is a component whose direction is determined by a projection onto one of the Cartesian coordinate axes, whereas radial and tangential components relate to the radius of rotation of an object as their direction of reference. The former is parallel to the radius and the latter is orthogonal to it.