— 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 generic Archimedes buoyancy demo with a single red cube and button-triggered animation — completely missing the two-crown (pure gold vs. gilded) scenario, vertical slider, mass/density displays, splash effects, and heureka animation that the prompt requires.
Implements generic Archimedes buoyancy demo with a single red cube and button-triggered animation — completely missing the two-crown (pure gold vs. gilded) scenario, vertical slider, mass/density displays, splash effects, and heureka animation that the prompt requires.