✓ 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
Solid implementation with correct Archimedes physics (same mass, gold 19.3 vs alloy 13.0 g/cm³, live displaced-water values, proportional water rise), but crowns teleport rather than animate falling — there is no smooth fall animation independent of slider drag.
Solid implementation with correct Archimedes physics (same mass, gold 19.3 vs alloy 13.0 g/cm³, live displaced-water values, proportional water rise), but crowns teleport rather than animate falling — there is no smooth fall animation independent of slider drag.