Physical Quantity is a quantity that can be measured and it consists of a numerical magnitude (size) and a unit . (e.g. 5m where 5 is...

Prefixes are used to simplify the writing of very big or very small numbers. For instance, instead of having to write 12 500 000 m every...

Prefixes are used to denote very large or small physical quantities . It is important that you know all these prefixes well.