The quantity in Physics grouped into two, namely the amount of principal and the amount of derivatives. Magnitude is the amount of principal that have been defined beforehand. Derived magnitude scale is derived from fundamental quantities. System unit scale of Physics in principle be standard or standard, that is fixed, universally applicable, and can easily be used at all times appropriately. Standardized system of units set in 1960 by a meeting of scientists in Sevres, Paris. System of units used in education and knowledge is called the metric system, which are grouped into large metric system or the MKS (Meter Kilogram Second) called the international system or abbreviated SI and metric systems of small or CGS (centimeter Gram Second). Basic scale and magnitude of the derivative along the unit can be seen in the following table.
