✓ 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
Strong physics (correct densities, same mass 1000g, gold 19.3 vs gilded 13.0 g/cm³, proportional displacement) and clean SVG layout, but crowns jump to position instantly without a fall animation — they translate linearly with the slider rather than simulating a free-fall drop.
Strong physics (correct densities, same mass 1000g, gold 19.3 vs gilded 13.0 g/cm³, proportional displacement) and clean SVG layout, but crowns jump to position instantly without a fall animation — they translate linearly with the slider rather than simulating a free-fall drop.