Sound: Crash Course Physics #18
Why the open web links it
Explains the nature of sound, how it travels, and introduces the Doppler effect in an accessible way.
Linked by 8 independent sites, 2 of them widely read in the 2026-10 crawl of the open web, including raindrop.page, supersummary.com, blog-sandtrapaudio.com, handsonsciencefun.com, iheartscience.net.