— Two crowns — Same mass, different density — Vertical slider ✓ Slider works — Slider controls crowns — Slider direction correct — Full slider range — Fall animation — Water displacement — Rising water level — Splash effects — Physics correct — Live mass value — Live volume value — Live density value — Live displaced water — Gilded displaces more — Heureka animation ✓ No external deps ✓ Light bg / dark text ✓ Self-contained HTML
Completely ignores the crown/Archimedes gold-fraud scenario — no two crowns, no mass/volume/density readouts, no vertical slider, no falling animation, no splash, no rising water level; it's a generic buoyancy demo with a generic red circle and horizontal sliders.
Completely ignores the crown/Archimedes gold-fraud scenario — no two crowns, no mass/volume/density readouts, no vertical slider, no falling animation, no splash, no rising water level; it's a generic buoyancy demo with a generic red circle and horizontal sliders.