mp-equation: add pre-defined physical constants

This adds some fundamental physical constants:
- Velocity of Light "c₀", 299,792,458 m/s
- Magnetic constant, "μ₀", 1.2566370614×10⁻ N/A²
- Electric constant, "ε₀", 8.85418782×10⁻¹² s⁴A²/m³kg
- Newtonian constant of gravitation, "G",  6.67408×10⁻¹¹ m³/(s²kg)
- Planck constant, "h", 6.62607004×10⁻³⁴ m²kg/s
- Elementary charge, "ｅ", 1.6021766208(98)×10⁻¹⁹ C
- Electron mass, "mₑ", 9.10938356×10⁻³¹ kg
- Proton mass, "mₚ", 1.672621898(21)×10⁻²⁷ kg
- Avogrado constant, "Nₐ", 6.02214086×10²³ mol⁻¹

They are taken from https://en.wikipedia.org/wiki/Physical_constant#Universal_constants
To insert them one would enter the corresponding symbol or use the gui.
They are set to a MPNumber from string.

0 files changed, 0 insertions, 0 deletions