✓ 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, well-rounded implementation with correct Archimedes physics, live value tables, splash particles, buoyancy/gravity arrows, and a polished heureka overlay — but the slider repositions crowns discretely rather than via a smooth fall animation, so the "crown falling into water" motion is absent.
Solid, well-rounded implementation with correct Archimedes physics, live value tables, splash particles, buoyancy/gravity arrows, and a polished heureka overlay — but the slider repositions crowns discretely rather than via a smooth fall animation, so the "crown falling into water" motion is absent.