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