✓ 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
Live values for mass, volume, and density are static (hardcoded in HTML, never updated by JS), only displaced water updates dynamically; no fall animation — crowns jump position rather than animate; splash triggers mid-submersion rather than at water entry point.
Live values for mass, volume, and density are static (hardcoded in HTML, never updated by JS), only displaced water updates dynamically; no fall animation — crowns jump position rather than animate; splash triggers mid-submersion rather than at water entry point.