What should sit beside a physics equation?

[equationencyclopedia]

Hi all,

I’m working on a physics equation reference and I’m trying to make the sourcing and explanations as reliable as possible.

When you look up a physics equation, what do you most want alongside it: assumptions, units, variable definitions, derivation, worked example, limits of use, or something else?

I’d really value input from people who study, teach, or use this material regularly.

 

[symbolipoint]

Wildly guessing, thematize the equations according to textbook sections of a target book from which to be used for studying. One may state what each variable represents or the variables could be understood according to what is being studied. Would a published reference handbook do what you want?