— 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
Technically competent Archimedes demo with correct physics and smooth animated object, but it is a generic buoyancy simulator — no crowns, no Archimedes story, no vertical crown-dipping slider, no Heureka moment, dark background (not light), and the prompt's core requirement of two crowns with same mass/different density is entirely absent.
Technically competent Archimedes demo with correct physics and smooth animated object, but it is a generic buoyancy simulator — no crowns, no Archimedes story, no vertical crown-dipping slider, no Heureka moment, dark background (not light), and the prompt's core requirement of two crowns with same mass/different density is entirely absent.