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0001 <?xml version="1.0" encoding="UTF-8"?> 0002 <list_of_constants version="1"> 0003 <constant name="Pi" symbol="π" category="mathematics" value="3.14159265358979323846264338327950288419"> 0004 <description> 0005 </description> 0006 </constant> 0007 <constant name="Euler Number" symbol="e" category="mathematics" value="2.71828182845904523536028747135266249775"> 0008 <description> 0009 </description> 0010 </constant> 0011 <constant name="Golden Ratio" symbol="φ" category="mathematics" value="1.61803398874989484820458683436563811"> 0012 <description> 0013 </description> 0014 </constant> 0015 <constant name="Light Speed" symbol="c" category="electromagnetism" value="2.99792458e8"> 0016 <description> 0017 </description> 0018 </constant> 0019 <constant name="Planck's Constant" symbol="h" category="nuclear" value="6.62607015e-34"> 0020 <description> 0021 </description> 0022 </constant> 0023 <constant name="Gravitational Constant" symbol="G" category="gravitation" value="6.67430e-11"> 0024 <description> 0025 </description> 0026 </constant> 0027 <constant name="Earth Acceleration" symbol="g" category="gravitation" value="9.80665"> 0028 <description> 0029 </description> 0030 </constant> 0031 <constant name="Elementary Charge" symbol="ᵉ" category="nuclear" value="1.602176634e-19"> 0032 <description> 0033 </description> 0034 </constant> 0035 <constant name="Elementary Charge" symbol="ᵉ" category="electromagnetism" value="1.602176634e-19"> 0036 <description> 0037 </description> 0038 </constant> 0039 <constant name="Impedance of Vacuum" symbol="Z₀" category="electromagnetism" value="376.730313668"> 0040 <description> 0041 </description> 0042 </constant> 0043 <constant name="Fine-Structure Constant" symbol="α" category="nuclear" value="7.2973525693e-3"> 0044 <description> 0045 </description> 0046 </constant> 0047 <constant name="Permeability of Vacuum" symbol="μ₀" category="electromagnetism" value="1.25663706212e-6"> 0048 <description> 0049 </description> 0050 </constant> 0051 <constant name="Permittivity of Vacuum" symbol="ε₀" category="electromagnetism" value="8.8541878128e-12"> 0052 <description> 0053 </description> 0054 </constant> 0055 <constant name="Boltzmann Constant" symbol="k" category="thermodynamics" value="1.380649e-23"> 0056 <description> 0057 </description> 0058 </constant> 0059 0060 <constant name="Atomic Mass Unit" symbol="mₐ" category="thermodynamics" value="1.66053906660e-27"> 0061 <description> 0062 </description> 0063 </constant> 0064 <constant name="Molar Gas Constant" symbol="R" category="thermodynamics" value="8.31446261815324"> 0065 <description> 0066 </description> 0067 </constant> 0068 <constant name="Stefan-Boltzmann Constant" symbol="σ" category="thermodynamics" value="5.670374419e-8"> 0069 <description> 0070 </description> 0071 </constant> 0072 <constant name="Avogadro's Number" symbol="Nₐ" category="thermodynamics" value="6.02214076e23"> 0073 <description> 0074 </description> 0075 </constant> 0076 </list_of_constants> 0077