Pendulum Waves
Why the open web links it
Demonstrates wave phenomena using pendulums to show traveling waves, standing waves, and beating patterns.
Linked by 79 independent sites, 8 of them widely read in the 2026-10 crawl of the open web, including mit.edu, popsci.com, wolfram.com, openculture.com, makezine.com.
Cited in 1 Wikipedia article, including Newton's cradle.