— 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 a single bouncing ball — it has no crowns, no slider, no water-level rise, no splash effects, and no Heureka moment; it fails nearly every required feature of the prompt.
This is a generic Archimedes buoyancy demo with a single bouncing ball — it has no crowns, no slider, no water-level rise, no splash effects, and no Heureka moment; it fails nearly every required feature of the prompt.