Have you ever sat on a beach and wondered how many grains of sand there were? I have, but I may be a special case. Today we're going to take that a step further, and figure out how many grains of sand there are on the entire earth. (Caveat: I'm only going to consider sand above the water level, since I don't have any idea what the composition of the ocean floor is).
Apologies for the hiatus recently, it's been a busy time (when isn't it). I hope to get back to talking about experiments soon, but for now I wanted to write up a quick problem I thought up a while back. The question is this: how long does a molecule of H2O on earth remain in the liquid state, on average?
This is a physics blog written by a bunch of graduate students out of Cornell.
The Virtuosi is in no way officially affiliated with Cornell University. It is the side project of some of its graduate students. The opinions expressed here do not necessarily reflect those of the university or the physics department.