✓ 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
Comprehensive SVG-based implementation with correct physics (1000g same mass, 51.8 vs 76.9 cm³), iterative water-level convergence, splash/bubble effects, and Heureka animation, but lacks a true fall animation (crowns teleport rather than animate on drop) and mass/density values in data panels are static rather than dynamically computed.
11,357 output tokens · claude-opus-4-6 · end_turn
Comprehensive SVG-based implementation with correct physics (1000g same mass, 51.8 vs 76.9 cm³), iterative water-level convergence, splash/bubble effects, and Heureka animation, but lacks a true fall animation (crowns teleport rather than animate on drop) and mass/density values in data panels are static rather than dynamically computed.