✓ 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 implementation with correct physics (gold 19.32 g/cm³, fake 11.30 g/cm³, same 1000 g mass), live data panels, splash/ripple/bubble effects, a crowd-pleasing Heureka animation with Archimedes figure, but the slider is custom SVG drag-based (no native range input) and its hit area is somewhat narrow, making precise control slightly finicky.
14,306 output tokens · claude-opus-4-6 · end_turn
Highly complete implementation with correct physics (gold 19.32 g/cm³, fake 11.30 g/cm³, same 1000 g mass), live data panels, splash/ripple/bubble effects, a crowd-pleasing Heureka animation with Archimedes figure, but the slider is custom SVG drag-based (no native range input) and its hit area is somewhat narrow, making precise control slightly finicky.