— 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
Competent general Archimedes demo with correct physics and polished dark-theme UI, but implements none of the required spec: no two crowns, no vertical fall-control slider, no splash/rising water animation, and no Heureka moment — it is a generic buoyancy sandbox, not the Archimedes crown experiment.
Competent general Archimedes demo with correct physics and polished dark-theme UI, but implements none of the required spec: no two crowns, no vertical fall-control slider, no splash/rising water animation, and no Heureka moment — it is a generic buoyancy sandbox, not the Archimedes crown experiment.