zero!

My physics teacher told us we could derive every physics formula ever created from this equation and thus never allowed us to use formula sheets. By the end of the year we had about 40 equations, most of which looked like this:

ax₁Ø(1/4vx₃^2.34)=u/2(x₂)^1/2

If you can get the above equation from /\F=0, you deserve to have a day named in your honor.