— 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 generic Archimedes buoyancy demo with density/size sliders — it has zero crowns, no vertical immersion slider, no fall animation, no splash, no Heureka moment, and uses a dark background, missing nearly every crown-specific requirement from the prompt.
This is a generic Archimedes buoyancy demo with density/size sliders — it has zero crowns, no vertical immersion slider, no fall animation, no splash, no Heureka moment, and uses a dark background, missing nearly every crown-specific requirement from the prompt.