— 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
No crowns, no slider, no two-object comparison — core prompt requirements entirely missing; implements only a generic single-object Archimedes animation with a hardcoded 5000 cm³ displaced volume and no physics grounding.
No crowns, no slider, no two-object comparison — core prompt requirements entirely missing; implements only a generic single-object Archimedes animation with a hardcoded 5000 cm³ displaced volume and no physics grounding.