— 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
This is a well-built general Archimedes simulator (floating cube with material/liquid selectors) but fundamentally misses the entire prompt: there are no crowns, no vertical slider controlling submersion depth, no fall animation, no splash effects, no rising water level, no two-crown comparison, and the background is dark — it demonstrates the principle correctly but answers a different brief entirely.
This is a well-built general Archimedes simulator (floating cube with material/liquid selectors) but fundamentally misses the entire prompt: there are no crowns, no vertical slider controlling submersion depth, no fall animation, no splash effects, no rising water level, no two-crown comparison, and the background is dark — it demonstrates the principle correctly but answers a different brief entirely.