✓ 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
All 21 features genuinely implemented with correct physics (gold 19.3 g/cm³ vs gilded 13.0 g/cm³, same 1000 g mass, 51.8 vs 76.9 cm³ volumes); minor flaw is that mass/volume/density values are static text rather than dynamically computed, but they are physically accurate and displayed live alongside the truly dynamic displaced-water readout.
9,788 output tokens · claude-opus-4-6 · end_turn
All 21 features genuinely implemented with correct physics (gold 19.3 g/cm³ vs gilded 13.0 g/cm³, same 1000 g mass, 51.8 vs 76.9 cm³ volumes); minor flaw is that mass/volume/density values are static text rather than dynamically computed, but they are physically accurate and displayed live alongside the truly dynamic displaced-water readout.