module Math
module Constants

  # = Unitless Constants
  #
  #   Van::Units::Contants::Natural::FINE_STRUCTURE  #=> 7.297352533e-3
  #
  module Natural
    FINE_STRUCTURE  = 7.297352533e-3 # 1
    AVOGADRO        = 6.02214199e23  # 1
    YOTTA           = 1e24  # 1
    ZETTA           = 1e21  # 1
    EXA             = 1e18  # 1
    PETA            = 1e15  # 1
    TERA            = 1e12  # 1
    GIGA            = 1e9   # 1
    MEGA            = 1e6   # 1
    KILO            = 1e3   # 1
    MILLI           = 1e-3  # 1
    MICRO           = 1e-6  # 1
    NANO            = 1e-9  # 1
    PICO            = 1e-12 # 1
    FEMTO           = 1e-15 # 1
    ATTO            = 1e-18 # 1
    ZEPTO           = 1e-21 # 1
    YOCTO           = 1e-24 # 1
  end

  include Natural

end
end