— 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 concept — shows generic buoyancy with two static SVG scenes and start/reset buttons instead of two crowns, a vertical slider, live values, water displacement, splash effects, or any Archimedes crown-comparison feature required by the prompt.
Completely wrong concept — shows generic buoyancy with two static SVG scenes and start/reset buttons instead of two crowns, a vertical slider, live values, water displacement, splash effects, or any Archimedes crown-comparison feature required by the prompt.