Have you ever heard this question?
WHERE AM I EVER GOING TO USE THIS?
I'll bet you have. Well, I decided to gather up some interesting formulas that could be used to show students some of the unusual places that equations/formulas show up.
You may choose to use these as a reference, or you could use them as a group activity. For example, you could put the students in small groups and have them manipulate the equations by solving for a different variable. The list has been divided into 7 groups so that you can use a different list in each student group. You may also choose to introduce the complete list over a period of time.