✓ 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
Physics values are correct (1000g mass, gold 19.3 g/cm³ vs plated 8.0 g/cm³, proportional displacement), but there is no genuine fall animation — crowns teleport instantly with the slider rather than animating a drop, and the splash fires continuously during any slider movement rather than only on water entry.
Physics values are correct (1000g mass, gold 19.3 g/cm³ vs plated 8.0 g/cm³, proportional displacement), but there is no genuine fall animation — crowns teleport instantly with the slider rather than animating a drop, and the splash fires continuously during any slider movement rather than only on water entry.