In its simplest construction, the Barton's pendulums experiment uses approximately 10 different pendulums hung from one common string.
Notes on verification
Wikipedia and two university lecture-demo sources confirm the general construction (a driver plus multiple driven pendulums on a common string), but exact counts vary (7-11) across sources, so 'approximately 10' is a reasonable but loose approximation. [tier=bronze indep_score=0.49 clusters=2 claim_tier=everyday]
Sources
- Barton's pendulums (wikipedia)
- https://sciencedemonstrations.fas.harvard.edu/presentations/bartons-pendulum (corroboration)
- https://web.physics.ucsb.edu/~lecturedemonstrations/Composer/Pages/40.42.html (corroboration)