Units - ProkopHapala/FireCore GitHub Wiki

Energy, Force, Length, mass

• Length l is in Angstroem 1A = 1e-10 [m]
• Energy E is in electron volts 1eV = 1.602176634e-19 [J]
• Force F is in eV/A = 1.602176634e-9 N = 1.602176634 nN
• mass m is in atomic mass units 1 amu = 1.6605390666050e-27

Time and velocity

• P = E/t = v*F
• F = m*a = m* l/t^2 => [eV/A] = [amu * A / dt^2 ] => dt^2= (A^2*amu) / (eV) = 1.0180506e-14 s = 10.18050571077474 fs
  • to convert from femtoseconds to my internal time should multiply by 1/10.18050571077474 = 0.0982269475