[whpalmer4]

Also, while I'm happy to answer these questions, they do seem to me to fall into the category of things where you really learn and absorb them best by tinkering and seeing what happens. Once you think you know what is going on, spend a few minutes trying to come up with a description for someone else who doesn't understand it yet (this is my tried-and-true route to deeper understanding). Even though you now know the answers, go try the experiments!