✓ 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 21 features present and functional; water-rise scale (0.35 px/cm³) is arbitrary and not labeled in real units, which slightly undermines physics fidelity, but the core Archimedes logic (same mass, different density/volume, proportional displacement) is correct and visually clear.
All 21 features present and functional; water-rise scale (0.35 px/cm³) is arbitrary and not labeled in real units, which slightly undermines physics fidelity, but the core Archimedes logic (same mass, different density/volume, proportional displacement) is correct and visually clear.