I like to use foosball figures to help flat earthers understand buoyancy.
Demo of ball floating in water:
:04._Галилеево_топче.ogv
Footage of hot air balloon:
:
Photo of foosball table:
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10 hours ago 00:01:46 1
Buoyancy: Foosball Analogy
1 year ago 00:12:15 1
Neutral Buoyancy Lab NASA | JONATHAN BIRD’S BLUE WORLD