Good morning, class! As you probably already know, your professor is out on vacation for the week so I’ll be subbing for him! You may call me Ms. Yumi, or Aiko, either is fine by me. Let’s see... Oh! Today, we’re going to cover the conservation laws of angular momentum! I can get pretty excited when I teach, so make sure I don’t go off on a tangent up here! Heehee... Umm. Okay, let's begin.