— 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
Implements a generic Archimedes buoyancy simulator with correct physics (float/sink/hover states, force arrows, FA = ρFgV) but is fundamentally a wrong deliverable — no crowns, no vertical crown-dipping slider, no fall animation, no splash, no water-level rise, no Heureka moment, and uses a dark background contrary to spec.
Implements a generic Archimedes buoyancy simulator with correct physics (float/sink/hover states, force arrows, FA = ρFgV) but is fundamentally a wrong deliverable — no crowns, no vertical crown-dipping slider, no fall animation, no splash, no water-level rise, no Heureka moment, and uses a dark background contrary to spec.