— 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
Entirely wrong demo — implements a generic three-case ASCII buoyancy explainer with button-switched static diagrams; none of the required features (two crowns, vertical slider, falling animation, water-level rise, live physics values, Heureka moment) are present.
Entirely wrong demo — implements a generic three-case ASCII buoyancy explainer with button-switched static diagrams; none of the required features (two crowns, vertical slider, falling animation, water-level rise, live physics values, Heureka moment) are present.