//
//      physical_constants.hpp
//
//	Copyright (c) 2001 by Michael S. Kenniston.  The most recent
//	version will be available at www.boost.org.  Permission is granted
//	to use this code without restriction so long as this copyright
//	notice appears in all source files.

//	This code is provided as-is, with no warrantee of correctness.

//	Unless otherwise specified, the definitions of all units in this
//	file are from NIST Special Publication 811, found online at
//	http://physics.nist.gov/Document/sp811.pdf, or from other NIST
//	web pages.


#ifndef _BFAFCE63_5FA7_11d5_B9D8_000000000000
#define _BFAFCE63_5FA7_11d5_B9D8_000000000000

#include "quantity.hpp"

namespace quantities {

inline Rep			pi()						{ return 3.14159; }

inline quantity< mass_d >		atomic_mass_constant()		{ return 1.66053873e-27 * kilogram(); }

//inline number			natural_log_base()			{ return ? ; }
//inline number			avogadro_constant()			{ return ?; }
//inline number			faraday_constant()			{ return ?; }
//inline ?				gravitational_constant()	{ return ?; }

inline quantity< energy_d >	electronvolt()				{ return 1.60217733e-19 * joule(); }
inline quantity< mass_d >		unified_atomic_mass_unit()	{ return 1.6605402e-27 * kilogram(); }

inline quantity< acceleration_d > free_fall_gn()			{ return 9.80665 * meter() / second() / second(); }


//inline quantity< speed_d >			speed_of_light()			{ return 1 * meter() / second(); }
//inline quantity< charge_d >			electron_charge()			{ return 1 * ? ; }
//inline quantity< mass_d >			electron_mass()				{ return 1 * kilogram(); }
//inline ?				plancks_constant()			{ return ? ; }
//inline ?				fine_structure_constant()	{ return ? ; }

} // namespace quantities

#endif // _BFAFCE63_5FA7_11d5_B9D8_000000000000