Registry · Definition
IV.D35
tau-effective
formalized
IV.D35 — Coulomb Constant
Coulomb constant: k_e = (π²/32) · Q²/(M·H·L³). Coefficient 1/32, π², exponents (-1,-3,-1,2). τ-derived k_e ≈ 8.987 × 10⁹ N·m²/C² (0.00% match).