1<?xml version="1.0" encoding="UTF-8"?> 2<list_of_constants version="1"> 3 <constant name="Pi" symbol="π" category="mathematics" value="3.14159265358979323846264338327950288419"> 4 <description> 5 </description> 6 </constant> 7 <constant name="Euler Number" symbol="e" category="mathematics" value="2.71828182845904523536028747135266249775"> 8 <description> 9 </description> 10 </constant> 11 <constant name="Golden Ratio" symbol="φ" category="mathematics" value="1.61803398874989484820458683436563811"> 12 <description> 13 </description> 14 </constant> 15 <constant name="Light Speed" symbol="c" category="electromagnetism" value="2.99792458e8"> 16 <description> 17 </description> 18 </constant> 19 <constant name="Planck's Constant" symbol="h" category="nuclear" value="6.6260693e-34"> 20 <description> 21 </description> 22 </constant> 23 <constant name="Gravitational Constant" symbol="G" category="gravitation" value="6.6742e-11"> 24 <description> 25 </description> 26 </constant> 27 <constant name="Earth Acceleration" symbol="g" category="gravitation" value="9.80665"> 28 <description> 29 </description> 30 </constant> 31 <constant name="Elementary Charge" symbol="e" category="nuclear" value="1.60217653e-19"> 32 <description> 33 </description> 34 </constant> 35 <constant name="Elementary Charge" symbol="e" category="electromagnetism" value="1.60217653e-19"> 36 <description> 37 </description> 38 </constant> 39 <constant name="Impedance of Vacuum" symbol="Z₀" category="electromagnetism" value="376.730313461"> 40 <description> 41 </description> 42 </constant> 43 <constant name="Fine-Structure Constant" symbol="α" category="nuclear" value="7.297352568e-3"> 44 <description> 45 </description> 46 </constant> 47 <constant name="Permeability of Vacuum" symbol="μ₀" category="electromagnetism" value="1.2566370614e-6"> 48 <description> 49 </description> 50 </constant> 51 <constant name="Permittivity of Vacuum" symbol="ε₀" category="electromagnetism" value="8.854187817e-12"> 52 <description> 53 </description> 54 </constant> 55 <constant name="Boltzmann Constant" symbol="k" category="thermodynamics" value="1.3806505e-23"> 56 <description> 57 </description> 58 </constant> 59 60 <constant name="Atomic Mass Unit" symbol="1u" category="thermodynamics" value="1.66053886e-27"> 61 <description> 62 </description> 63 </constant> 64 <constant name="Molar Gas Constant" symbol="R" category="thermodynamics" value="8.314472"> 65 <description> 66 </description> 67 </constant> 68 <constant name="Stefan-Boltzmann Constant" symbol="σ" category="thermodynamics" value="5.670400e-8"> 69 <description> 70 </description> 71 </constant> 72 <constant name="Avogadro's Number" symbol="N_A" category="thermodynamics" value="6.0221415e23"> 73 <description> 74 </description> 75 </constant> 76</list_of_constants> 77 78