Tuesday, April 15th, 2008 Posted in Biology | No Comments »
There is no evidence that it is the least bit harmful. It is often annoying to those who don't crack their own knuckles, and perhaps that is partly where the ... Read more..Friday, April 4th, 2008 Posted in Physics | No Comments »
The principle factor affecting a moving (and spinning) baseball is air drag. Imagine a standard fastball thrown with a straight overhead motion. The ball will be spinning naturally on a ... Read more..Tuesday, April 1st, 2008 Posted in Astronomy, Physics | No Comments »
First, the simplest definition of density: it is how heavy something is relative to its size. A pound of rocks weighs the same as a pound of ping pong balls. ... Read more..