— 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
Completely wrong demo — shows a generic single-sphere buoyancy toy with button-triggered animation instead of the required two-crown (pure gold vs. gilded), vertical-slider, Archimedes-crown-story simulation; none of the required features (crowns, slider, density/mass/volume live values, rising water, splash, Heureka) are present.
Completely wrong demo — shows a generic single-sphere buoyancy toy with button-triggered animation instead of the required two-crown (pure gold vs. gilded), vertical-slider, Archimedes-crown-story simulation; none of the required features (crowns, slider, density/mass/volume live values, rising water, splash, Heureka) are present.