FrameCalc
Refuse a wrong number.
FrameCalc is a browser workbench for lab ↔ COM collisions, decays, and Lorentz boosts — with live plots, LaTeX copy, and labs that show conserved quantities. It refuses illegal kinematics instead of printing a wrong number.
Four products, one kernel policy
Physics is free. Pro is worksheets, sweeps, and code. Revenue funds IEC / fusor diagnostics research.
Kinematics workbench
Collisions, decays, Lorentz, Compton — free, with LaTeX.
Free
Graphical labs
Kepler, Schwarzschild, TDSE, Ising — conserved quantities on screen.
Free
Fusion diagnostics
Bosch–Hale ⟨σv⟩, Child–Langmuir, IEC beam-target yield (labeled).
Free
Pro worksheets
PDF worksheet, batch CSV, CAS export, course pack, saved notebook.
Paid
Kinematics workbench
Advertised tools — algebraic θ*, gold checks, LaTeX copy.
Graphical labs
Teaching-resolution sims with conserved quantities on screen.
Fusion diagnostics
Bosch–Hale ⟨σv⟩, Child–Langmuir, Coulomb barrier, labeled IEC yield.