Units & DIMENSIONS - FACTORS AND PREFIXES

UNITS & DIMENSIONS - FACTORS AND PREFIXES 
MULTIPLE AND SUB-MULTIPLE FACTORS
Multiples and submultiples are the prefixes and suffixes that we frequently use to express or show quantities in scientific terminology.Prefixes for multiples and submultiples of units are used to more conveniently express very large and very small numbers (convenient compared to scientific notation or long strings of leading or trailing zeroes). ... True prefixes are attached to the unit.Depending upon the magnitudes of physical quantities we measure, we have to use different multiplication factors suitable for that particular case.Here let us see some widely used multiplication factors.
S.I. Prefixes:
    In physics we have to deal from very small (micro) to very large (macro) magnitudes as one side we talk about the atom while on the other side of universe, e.g., the mass of an electron is 9.1\(\times\) 10^–31kg while that of the sun is 2 \(\times\) 10³⁰kg. To express such large or small magnitudes simultaneously we use the following prefixes: