Where touchscreens, sattelite TV, and LEDs (manufacturing and science) come from is really through the development of an affinity for analysis. Physics Etc. explores calculus, in pursuit of, “the study of the properties and interactions of space, time, matter, and energy”, as covered by the more advanced texts, for which this is preparation.
Just because one doesn't have prior preparation in the art of science doesn't mean he can't do more than nothing—you can do some of it, thanks to neuroplasticity. Thereby making math and science potentially important on everyone's list of things they look forward to doing, on the Internet.
I have come to believe the AP-level physics lesson articles found here are for people of all ages and aptitudes who have wanted more than the TV's treatment of physics, and maybe got daunted by the content of physics, from Internet searches for the science if one's curiosity is permitted to run. I believe there's a perfect book, literature, for everyone to study from, to learn the art, doctrine, and conventions of orthodox philosophy, and for some those books are physics, all of which can be tracked down on the Internet, and I've added a few on the references page.
The equation typesetting is provided by Mathjax.