— 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
Solid general Archimedes physics simulator with correct buoyancy math and live values, but fundamentally misses the prompt: no two crowns, no vertical slider, no fall/splash animation, no rising water level, no Heureka trigger, and uses a dark background — the core crown-comparison scenario is entirely absent.
Solid general Archimedes physics simulator with correct buoyancy math and live values, but fundamentally misses the prompt: no two crowns, no vertical slider, no fall/splash animation, no rising water level, no Heureka trigger, and uses a dark background — the core crown-comparison scenario is entirely absent.