Planck natural units (1899)

Layer 1 — Physicsin the dimensional-analysis subtree

Planck 1899: l_P = sqrt(h G/c^3) ~ 1.6e-35 m; t_P ~ 5.4e-44 s; m_P ~ 2.2e-8 kg; T_P ~ 1.4e32 K; sets natural-units scheme using only h, c, G, k_B fundamental constants.

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