<constants><constant name="mp" desc="Mass of Proton" value="1.672621777e-27"/><constant name="me" desc="Mass of Electron" value="9.10938291e-31"/><constant name="mn" desc="Mass of Neutron" value="1.674927351e-27"/><constant name="qe" desc="Charge of Electron" value="1.602176565e-19"/><constant name="h" desc="Planck's constant" value="6.62606957e-34"/><constant name="gv" desc="Gravitational constant" value="6.67384e-11"/><constant name="k" desc="Boltzmann constant" value="1.3806488e-23"/><constant name="g" desc="Acceleration due to Gravity" value="9.80665"/></constants>
<constants><constant name="c" desc="Speed of Light [m·s⁻¹]" value="299792458"/><constant name="h" desc="Planck constant [J·s]" value="6.62606957e-34"/><constant name="mp" desc="Mass of Proton [kg]" value="1.672621777e-27"/><constant name="me" desc="Mass of Electron [kg]" value="9.10938291e-31"/><constant name="mn" desc="Mass of Neutron [kg]" value="1.674927351e-27"/><constant name="qe" desc="Elementary Charge [C]" value="1.602176565e-19"/><constant name="gv" desc="Gravitational constant [m³·kg⁻¹·s⁻²]" value="6.67384e-11"/><constant name="k" desc="Boltzmann constant [J·K⁻¹]" value="1.3806488e-23"/><constant name="g" desc="Acceleration due to Gravity [m·s⁻²]" value="9.80665"/></constants>
Add speed of light and append units
Constants: Add speed of light and append units
