Well, that is what I imagine a friendly bet over beer in the middle ages would look like. Let us say two vikings taking a break after some invading of Europe. Not that things have changed that much. We still have silly bar bets over the sizes of *ahem*…
Graff and Olaff are in desperate need of a meter stick.
So after some potato bliss, I had to think at great length about how to introduce some other elementary (in the sense of being fundamental, not easy) physics concepts. You see, it is hard to talk about physics without the three basic elementary irreducible concepts: mass, length, time.
Shores of the Dirac Sea 