Lets post nerdy jokes

Here's a particularly relevant one:

Q: What is the physicist's definition of a vector space?
A: A set V satisfying the axiom that for any x in V, x has a little arrow drawn over it.

Newton, Pascal and Planck are playing hide and seek. It's Planck's turn to count to 10. Pascal runs for the bushes and hides, but Newton stays put and draws a sqaure around his feet with a side of 1 meter.

Planck turns around and spots Newton: "Gotcha, Newton!"
But Newton replies: "No, you don't: 1 Newton per meter squared equals 1 Pascal, so I won"