✓ 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
Highly complete SVG-based implementation with correct Archimedes physics (Au 19.3, alloy 13.0, same 1000g mass), live data panels, splash particles, and Heureka animation, but the custom drag-only SVG slider lacks the ergonomics and accessibility of a native range input, and the water-rise pixel scaling (0.5 px/cm³) is purely cosmetic rather than geometrically derived from tank dimensions.
10,565 output tokens · claude-opus-4-6 · end_turn
Highly complete SVG-based implementation with correct Archimedes physics (Au 19.3, alloy 13.0, same 1000g mass), live data panels, splash particles, and Heureka animation, but the custom drag-only SVG slider lacks the ergonomics and accessibility of a native range input, and the water-rise pixel scaling (0.5 px/cm³) is purely cosmetic rather than geometrically derived from tank dimensions.