Physical Constants

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• e = 2.718281828
• π = 3.141592653
• g_c = 1.00000 (kgm/Ns)
• Avogadros constant : N_A = 6.022169 10²⁶ (kmol^-1)
• Boltzmann constant : k = 1.380622 10^-23 (J/K) 
• First radiation constant : C₁ = 2 π h c² = 3.741844 10^-16 (Wm²)
• Gas constant : R_u = 8.31434 103 (J/kmol K)
• Gravitational constant : G =  6.6732 10^-11 (Nm²/kg²)
• Planck constant : h = 6.626196 10^-34 (Js)
• Second radiation constant : C₂ = hc/k = 1.438833 10^-2 (mK)
• Speed of light in vacuum : c = 2.997925 10⁸ (m/s)
• Stefan-Boltzmann constant : σ = 5.66961 10^-8 (W/m²K⁴)

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