I have been in LOVE with HyperPhysics since the late 1990s when I first saw it.
At least a few times a year, I find myself diving in. At the time, it was dialup and yet the site was always very fast because it was so concisely written.
They even had a Windows download once. I don’t know if they still do but I probably have an ancient copy on a floppy disk (which I can’t read now )
Awesome, awesome site and they keep it continually up to date and reliable.
One of my bucket-list projects is to go through the entire site. I’ve hit most of my areas of interest already but there’s a lot of stuff that I’ve missed.
It’s really awesome. I’ve recommended to so many people, from schoolkids to adults because it’s really easy to understand.
If something DOESN’T make sense, you can follow the links around ’til you understand it. It’s all-inclusive: a marvelous use of hyperlinking and concept mapping / mindmapping.