While those codes can seem abstract — especially if you've got little-to-no background in computer programming — they're actually a way for Apple to categorize and easily identify the specific ...

Physics and Python stuff. Most of the videos here are either adapted from class lectures or solving physics problems. I really like to use numerical calculations without all the fancy programming ...

It's actual code. If you click the "pencil" icon, you can see the program and even change the values. You can see the mass oscillates back and forth to produce this very nice and smooth graph.