✓ 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
All core features present with correct Archimedes physics (same mass 1000g, gold 19.3 g/cm³ vs gilded 13.0 g/cm³, realistic water rise scaling), but crown-in-water positioning logic is computed twice with the second redundant pass potentially overriding the first, and the crown transition from above-tank to in-tank has a visual snap rather than a smooth continuous fall.
All core features present with correct Archimedes physics (same mass 1000g, gold 19.3 g/cm³ vs gilded 13.0 g/cm³, realistic water rise scaling), but crown-in-water positioning logic is computed twice with the second redundant pass potentially overriding the first, and the crown transition from above-tank to in-tank has a visual snap rather than a smooth continuous fall.