✓ 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
Buoyancy force calculation is doubly wrong (multiplied by 1e-6 then by 1000 yields milli-millinewtons, not mN), and water-rise pixel scaling uses an ad-hoc constant chain that yields negligible visible rise; no true fall animation—crown teleports with slider position rather than being released and falling under gravity.
Buoyancy force calculation is doubly wrong (multiplied by 1e-6 then by 1000 yields milli-millinewtons, not mN), and water-rise pixel scaling uses an ad-hoc constant chain that yields negligible visible rise; no true fall animation—crown teleports with slider position rather than being released and falling under gravity.