Symbols and Formulae

What are Symbols?

Symbols are used to denote values in certain scenarios.
For example if a building would be 20 meters tall, it could be written as h = 20m. In this case "h" would be the symbol, standing for height.
Most symbols start with the first letter of the measurement, for example W for work.
Some symbols use Greek letters if others aren't available.
Symbols are generally written in italics in order to not be confused with units.

Some units have subscripts which indicate different things. For example frictional force is written as force is normally written but with an "f" subscript.
Numbers can be written as subscripts to indicate different units for different scenarios or objects. For example if there would be two objects, one could have a mass of m₁ and the other could have m₂.
Subscripts should not be confused with superscripts, which appear on the top right of variables instead of the bottom right. Superscripts indicate a power.
Below is a list of subscripts for different symbols.