✓ 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
Displaced water updates live and physics values are plausible (Au 19.3 g/cm³, Au/Ag 13.0 g/cm³, same 1000 g mass), but mass/volume/density panels are static text rather than live-updating values, and there is no animated fall — the crowns only translate continuously with the slider rather than dropping with momentum.
9,637 output tokens · claude-opus-4-6 · end_turn
Displaced water updates live and physics values are plausible (Au 19.3 g/cm³, Au/Ag 13.0 g/cm³, same 1000 g mass), but mass/volume/density panels are static text rather than live-updating values, and there is no animated fall — the crowns only translate continuously with the slider rather than dropping with momentum.