Aoliba · See which physics model fits,
then decide where to go deeper.
Every model states what it treats the object as, what it assumes, and when it breaks. That is what makes “which one applies” answerable.
Question → scale → size of the correction → model.
The same falling ball is not one calculation.
Where to start
01 · Map
One ball, several descriptions
From free fall to a quantum state. Each card says where that description starts to fail.
Model map 02 · PickerEstimate first, then pick
Move v/c, Re, and the other sliders. The suggested model changes with them.
Model picker 03 · DemosPush a parameter until the curves split
Ten interactive demos. Two models that agree at one setting disagree at another.
17 demosCriteria you can actually move
v/c, S/ℏ, Re, N, and De are sliders. Knudsen number and Φ/c² are listed, but not wired up yet.