Friday Physics #4

Welcome back to Friday Physics! Today I'm fighting Wolfram Alpha, a lack of sleep, and some significant deadlines. Please cheer me up with your fun physics questions. :)

As always, there may be a delay in my answering (yay, work!), I reserve the right to google and/or say "I don't know" (if Bill Nye can do it, so can I), and there may be cats.