constants.h
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1 /*
2  -------------------------------------------------------------------
3 
4  Copyright (C) 2006-2017, Andrew W. Steiner
5 
6  This file is part of O2scl.
7 
8  O2scl is free software; you can redistribute it and/or modify
9  it under the terms of the GNU General Public License as published by
10  the Free Software Foundation; either version 3 of the License, or
11  (at your option) any later version.
12 
13  O2scl is distributed in the hope that it will be useful,
14  but WITHOUT ANY WARRANTY; without even the implied warranty of
15  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16  GNU General Public License for more details.
17 
18  You should have received a copy of the GNU General Public License
19  along with O2scl. If not, see <http://www.gnu.org/licenses/>.
20 
21  -------------------------------------------------------------------
22 */
23 /** \file constants.h
24  \brief File defining numerical constants
25 */
26 #ifndef O2SCL_CONSTANTS_H
27 #define O2SCL_CONSTANTS_H
28 
29 #include <cmath>
30 
31 /** \brief Constants
32 
33  CODATA 2010 values are in \ref Mohr12.
34 */
35 namespace o2scl_const {
36 
37  const double yotta=1e24;
38  const double zetta=1e21;
39  const double exa=1e18;
40  const double peta=1e15;
41  const double tera=1e12;
42  const double giga=1e9;
43  const double mega=1e6;
44  const double kilo=1e3;
45  const double milli=1e-3;
46  const double micro=1e-6;
47  const double nano=1e-9;
48  const double pico=1e-12;
49  const double femto=1e-15;
50  const double atto=1e-18;
51  const double zepto=1e-21;
52  const double yocto=1e-24;
53 
54  /** \brief Fine structure constant (CODATA 2010 value)
55  */
56  const double fine_structure=7.2973525698e-3;
57  /** \brief Avogadro's number (CODATA 2010 value)
58  */
59  const double avogadro=6.02214129e23;
60 
61  /// \f$ \pi \f$
62  const double pi=acos(-1.0);
63  /// \f$ \pi^2 \f$
64  const double pi2=pi*pi;
65  /// \f$ \zeta(3/2) \f$
66  const double zeta32=2.6123753486854883433;
67  /// \f$ \zeta(2) \f$
68  const double zeta2=1.6449340668482264365;
69  /// \f$ \zeta(5/2) \f$
70  const double zeta52=1.3414872572509171798;
71  /// \f$ \zeta(3) \f$
72  const double zeta3=1.2020569031595942854;
73  /// \f$ \zeta(5) \f$
74  const double zeta5=1.0369277551433699263;
75  /// \f$ \zeta(7) \f$
76  const double zeta7=1.0083492773819228268;
77 
78  /// \f$ \sin^2 \theta_W \f$ (PDG 2014 value)
79  const double sin2_theta_weak=0.23126;
80 }
81 
82 /** \brief Constants in CGS units
83 
84  CODATA 2010 values are in \ref Mohr12. IAU 2009 values
85  are from \ref Luzum11 . Solar mass from
86  http://asa.usno.navy.mil/SecK/2013/Astronomical_Constants_2013.pdf
87 
88  \comment
89  See also
90  http://asa.usno.navy.mil/static/files/2015/Astronomical_Constants_2015.pdf
91  \endcomment
92 
93 */
94 namespace o2scl_cgs {
95  /// cm
96  const double schwarzchild_radius=2.95325008e5;
97  /// cm / s
98  const double speed_of_light=2.99792458e10;
99  /// Newtonian constant of gravitation in cm^3 / g s^2 (CODATA 2010 value)
100  const double gravitational_constant=6.67384e-8;
101  /// Planck constant in g cm^2 / s (CODATA 2010 value)
102  const double plancks_constant_h=6.62606957e-27;
103  /// Planck constant divided by 2 pi in g cm^2 / s (derived)
105  2.0/o2scl_const::pi;
106  /// Astronomical unit in cm (IAU 2009 value; now exact)
107  const double astronomical_unit=1.49597870700e13;
108  /// cm
109  const double light_year=9.46053620707e17;
110  /// cm
111  const double parsec=3.08567758135e18;
112  /// cm / s^2
113  const double grav_accel=9.80665e2;
114  /// Electron volt in g cm^2 / s^2 (CODATA 2010 value)
115  const double electron_volt=1.602176565e-12;
116  /// Electron mass in g (CODATA 2010 value)
117  const double mass_electron=9.10938291e-28;
118  /// Muon mass in g (CODATA 2010 value)
119  const double mass_muon=1.883531475e-25;
120  /// Proton mass in g (CODATA 2010 value)
121  const double mass_proton=1.672621777e-24;
122  /// Neutron mass in g (CODATA 2010 value)
123  const double mass_neutron=1.674927351e-24;
124 
125  /// Deuteron mass in kg (CODATA 2010 value)
126  const double mass_deuteron=3.34358348e-24;
127  /// Triton mass in kg (CODATA 2010 value)
128  const double mass_triton=5.00735630e-24;
129  /// Helion mass in kg (CODATA 2010 value)
130  const double mass_helion=5.00641234e-24;
131  /// Alpha particle mass in kg (CODATA 2010 value)
132  const double mass_alpha=6.64465675e-24;
133 
134  /// Rydberg constant in g cm^2 / s^2 (CODATA 2010 value)
135  const double rydberg=2.179872171e-11;
136  /// Boltzmann constant in g cm^2 / K s^2 (CODATA 2010 value)
137  const double boltzmann=1.3806488e-16;
138  /// g cm^2 / K mol s^2
139  const double molar_gas=8.314472e7;
140  /// cm^3 / mol
141  const double standard_gas_volume=2.2710981e4;
142  /// s
143  const double minute=6e1;
144  /// s
145  const double hour=3.6e3;
146  /// s
147  const double day=8.64e4;
148  /// s
149  const double week=6.048e5;
150  /// cm
151  const double inch=2.54e0;
152  /// cm
153  const double foot=3.048e1;
154  /// cm
155  const double yard=9.144e1;
156  /// cm
157  const double mile=1.609344e5;
158  /// cm
159  const double nautical_mile=1.852e5;
160  /// cm
161  const double fathom=1.8288e2;
162  /// cm
163  const double mil=2.54e-3;
164  /// cm
165  const double point=3.52777777778e-2;
166  /// cm
167  const double texpoint=3.51459803515e-2;
168  /// cm
169  const double micron=1e-4;
170  /// cm
171  const double angstrom=1e-8;
172  /// cm^2
173  const double hectare=1e8;
174  /// cm^2
175  const double acre=4.04685642241e7;
176  /// cm^2
177  const double barn=1e-24;
178  /// cm^3
179  const double liter=1e3;
180  /// cm^3
181  const double us_gallon=3.78541178402e3;
182  /// cm^3
183  const double quart=9.46352946004e2;
184  /// cm^3
185  const double pint=4.73176473002e2;
186  /// cm^3
187  const double cup=2.36588236501e2;
188  /// cm^3
189  const double fluid_ounce=2.95735295626e1;
190  /// cm^3
191  const double tablespoon=1.47867647813e1;
192  /// cm^3
193  const double teaspoon=4.92892159375e0;
194  /// cm^3
195  const double canadian_gallon=4.54609e3;
196  /// cm^3
197  const double uk_gallon=4.546092e3;
198  /// cm / s
199  const double miles_per_hour=4.4704e1;
200  /// cm / s
201  const double kilometers_per_hour=2.77777777778e1;
202  /// cm / s
203  const double knot=5.14444444444e1;
204  /// g
205  const double pound_mass=4.5359237e2;
206  /// g
207  const double ounce_mass=2.8349523125e1;
208  /// g
209  const double ton=9.0718474e5;
210  /// g
211  const double metric_ton=1e6;
212  /// g
213  const double uk_ton=1.0160469088e6;
214  /// g
215  const double troy_ounce=3.1103475e1;
216  /// g
217  const double carat=2e-1;
218  /// Atomic mass constant in g (CODATA 2010 value)
219  const double unified_atomic_mass=1.660538921e-24;
220  /// cm g / s^2
221  const double gram_force=9.80665e2;
222  /// cm g / s^2
223  const double pound_force=4.44822161526e5;
224  /// cm g / s^2
225  const double kilopound_force=4.44822161526e8;
226  /// cm g / s^2
227  const double poundal=1.38255e4;
228  /// g cm^2 / s^2
229  const double calorie=4.1868e7;
230  /// g cm^2 / s^2
231  const double btu=1.05505585262e10;
232  /// g cm^2 / s^2
233  const double therm=1.05506e15;
234  /// g cm^2 / s^3
235  const double horsepower=7.457e9;
236  /// g / cm s^2
237  const double bar=1e6;
238  /// g / cm s^2
239  const double std_atmosphere=1.01325e6;
240  /// g / cm s^2
241  const double torr=1.33322368421e3;
242  /// g / cm s^2
243  const double meter_of_mercury=1.33322368421e6;
244  /// g / cm s^2
245  const double inch_of_mercury=3.38638815789e4;
246  /// g / cm s^2
247  const double inch_of_water=2.490889e3;
248  /// g / cm s^2
249  const double psi=6.89475729317e4;
250  /// g / cm s
251  const double poise=1e0;
252  /// cm^2 / s
253  const double stokes=1e0;
254  /// cd / cm^2
255  const double stilb=1e0;
256  /// cd sr
257  const double lumen=1e0;
258  /// cd sr / cm^2
259  const double lux=1e-4;
260  /// cd sr / cm^2
261  const double phot=1e0;
262  /// cd sr / cm^2
263  const double footcandle=1.076e-3;
264  /// cd sr / cm^2
265  const double lambert=1e0;
266  /// cd sr / cm^2
267  const double footlambert=1.07639104e-3;
268  /// 1 / s
269  const double curie=3.7e10;
270  /// A s / g
271  const double roentgen=2.58e-7;
272  /// cm^2 / s^2
273  const double rad=1e2;
274  /// g
275  const double solar_mass=1.9884e33;
276  /// cm
277  const double bohr_radius=5.291772083e-9;
278  /// cm g / s^2
279  const double newton=1e5;
280  /// cm g / s^2
281  const double dyne=1e0;
282  /// g cm^2 / s^2
283  const double joule=1e7;
284  /// g cm^2 / s^2
285  const double erg=1e0;
286  /// g / K^4 s^3
287  const double stefan_boltzmann_constant=5.67039934436e-5;
288  /// cm^2
289  const double thomson_cross_section=6.65245853542e-25;
290  /** \brief Fermi coupling constant in s^4 / cm^4 g^2,
291  defined as \f$ 1.166364 \times 10^{-5}~\mathrm{GeV}^{-2} \f$
292  (CODATA 2010 value)
293  */
294  const double Gfermi=1.166364e-23/electron_volt/electron_volt;
295 }
296 
297 /** \brief Constants in CGSM units
298 
299  See also documentation at \ref o2scl_cgs .
300 */
301 namespace o2scl_cgsm {
302  /// cm
303  const double schwarzchild_radius=2.95325008e5;
304  /// cm / s
305  const double speed_of_light=2.99792458e10;
306  /// Newtonian constant of gravitation in cm^3 / g s^2 (CODATA 2010 value)
307  const double gravitational_constant=6.67384e-8;
308  /// Planck constant in g cm^2 / s (CODATA 2010 value)
309  const double plancks_constant_h=6.62606957e-27;
310  /// Planck constant divided by 2 pi in g cm^2 / s (derived)
312  2.0/o2scl_const::pi;
313  /// Astronomical unit in cm (IAU 2009 value; now exact)
314  const double astronomical_unit=1.49597870700e13;
315  /// cm
316  const double light_year=9.46053620707e17;
317  /// cm
318  const double parsec=3.08567758135e18;
319  /// cm / s^2
320  const double grav_accel=9.80665e2;
321  /// Electron volt in g cm^2 / s^2 (CODATA 2010 value)
322  const double electron_volt=1.602176565e-12;
323  /// Electron mass in g (CODATA 2010 value)
324  const double mass_electron=9.10938291e-28;
325  /// Muon mass in g (CODATA 2010 value)
326  const double mass_muon=1.883531475e-25;
327  /// Proton mass in g (CODATA 2010 value)
328  const double mass_proton=1.672621777e-24;
329  /// Neutron mass in g (CODATA 2010 value)
330  const double mass_neutron=1.674927351e-24;
331 
332  /// Deuteron mass in kg (CODATA 2010 value)
333  const double mass_deuteron=3.34358348e-24;
334  /// Triton mass in kg (CODATA 2010 value)
335  const double mass_triton=5.00735630e-24;
336  /// Helion mass in kg (CODATA 2010 value)
337  const double mass_helion=5.00641234e-24;
338  /// Alpha particle mass in kg (CODATA 2010 value)
339  const double mass_alpha=6.64465675e-24;
340 
341  /// Rydberg constant in g cm^2 / s^2 (CODATA 2010 value)
342  const double rydberg=2.179872171e-11;
343  /// Boltzmann constant in g cm^2 / K s^2 (CODATA 2010 value)
344  const double boltzmann=1.3806488e-16;
345  /// abamp cm^2
346  const double electron_magnetic_moment=9.28476362e-21;
347  /// abamp cm^2
348  const double proton_magnetic_moment=1.410606633e-23;
349  /// g cm^2 / K mol s^2
350  const double molar_gas=8.314472e7;
351  /// cm^3 / mol
352  const double standard_gas_volume=2.2710981e4;
353  /// s
354  const double minute=6e1;
355  /// s
356  const double hour=3.6e3;
357  /// s
358  const double day=8.64e4;
359  /// s
360  const double week=6.048e5;
361  /// cm
362  const double inch=2.54e0;
363  /// cm
364  const double foot=3.048e1;
365  /// cm
366  const double yard=9.144e1;
367  /// cm
368  const double mile=1.609344e5;
369  /// cm
370  const double nautical_mile=1.852e5;
371  /// cm
372  const double fathom=1.8288e2;
373  /// cm
374  const double mil=2.54e-3;
375  /// cm
376  const double point=3.52777777778e-2;
377  /// cm
378  const double texpoint=3.51459803515e-2;
379  /// cm
380  const double micron=1e-4;
381  /// cm
382  const double angstrom=1e-8;
383  /// cm^2
384  const double hectare=1e8;
385  /// cm^2
386  const double acre=4.04685642241e7;
387  /// cm^2
388  const double barn=1e-24;
389  /// cm^3
390  const double liter=1e3;
391  /// cm^3
392  const double us_gallon=3.78541178402e3;
393  /// cm^3
394  const double quart=9.46352946004e2;
395  /// cm^3
396  const double pint=4.73176473002e2;
397  /// cm^3
398  const double cup=2.36588236501e2;
399  /// cm^3
400  const double fluid_ounce=2.95735295626e1;
401  /// cm^3
402  const double tablespoon=1.47867647813e1;
403  /// cm^3
404  const double teaspoon=4.92892159375e0;
405  /// cm^3
406  const double canadian_gallon=4.54609e3;
407  /// cm^3
408  const double uk_gallon=4.546092e3;
409  /// cm / s
410  const double miles_per_hour=4.4704e1;
411  /// cm / s
412  const double kilometers_per_hour=2.77777777778e1;
413  /// cm / s
414  const double knot=5.14444444444e1;
415  /// g
416  const double pound_mass=4.5359237e2;
417  /// g
418  const double ounce_mass=2.8349523125e1;
419  /// g
420  const double ton=9.0718474e5;
421  /// g
422  const double metric_ton=1e6;
423  /// g
424  const double uk_ton=1.0160469088e6;
425  /// g
426  const double troy_ounce=3.1103475e1;
427  /// g
428  const double carat=2e-1;
429  /// Atomic mass constant in g (CODATA 2010 value)
430  const double unified_atomic_mass=1.660538921e-24;
431  /// cm g / s^2
432  const double gram_force=9.80665e2;
433  /// cm g / s^2
434  const double pound_force=4.44822161526e5;
435  /// cm g / s^2
436  const double kilopound_force=4.44822161526e8;
437  /// cm g / s^2
438  const double poundal=1.38255e4;
439  /// g cm^2 / s^2
440  const double calorie=4.1868e7;
441  /// g cm^2 / s^2
442  const double btu=1.05505585262e10;
443  /// g cm^2 / s^2
444  const double therm=1.05506e15;
445  /// g cm^2 / s^3
446  const double horsepower=7.457e9;
447  /// g / cm s^2
448  const double bar=1e6;
449  /// g / cm s^2
450  const double std_atmosphere=1.01325e6;
451  /// g / cm s^2
452  const double torr=1.33322368421e3;
453  /// g / cm s^2
454  const double meter_of_mercury=1.33322368421e6;
455  /// g / cm s^2
456  const double inch_of_mercury=3.38638815789e4;
457  /// g / cm s^2
458  const double inch_of_water=2.490889e3;
459  /// g / cm s^2
460  const double psi=6.89475729317e4;
461  /// g / cm s
462  const double poise=1e0;
463  /// cm^2 / s
464  const double stokes=1e0;
465  /// abamp s / mol
466  const double faraday=9.64853429775e3;
467  /// abamp s
468  const double electron_charge=1.602176565e-20;
469  /// cd / cm^2
470  const double stilb=1e0;
471  /// cd sr
472  const double lumen=1e0;
473  /// cd sr / cm^2
474  const double lux=1e-4;
475  /// cd sr / cm^2
476  const double phot=1e0;
477  /// cd sr / cm^2
478  const double footcandle=1.076e-3;
479  /// cd sr / cm^2
480  const double lambert=1e0;
481  /// cd sr / cm^2
482  const double footlambert=1.07639104e-3;
483  /// 1 / s
484  const double curie=3.7e10;
485  /// abamp s / g
486  const double roentgen=2.58e-8;
487  /// cm^2 / s^2
488  const double rad=1e2;
489  /// g
490  const double solar_mass=1.9884e33;
491  /// cm
492  const double bohr_radius=5.291772083e-9;
493  /// cm g / s^2
494  const double newton=1e5;
495  /// cm g / s^2
496  const double dyne=1e0;
497  /// g cm^2 / s^2
498  const double joule=1e7;
499  /// g cm^2 / s^2
500  const double erg=1e0;
501  /// g / K^4 s^3
502  const double stefan_boltzmann_constant=5.67039934436e-5;
503  /// cm^2
504  const double thomson_cross_section=6.65245853542e-25;
505  /// Bohr magneton in abamp cm^2 (CODATA 2010 value)
506  const double bohr_magneton=9.27400968e-21;
507  /// abamp cm^2
508  const double nuclear_magneton=5.05078317e-24;
509  /** \brief Fermi coupling constant in s^4 / cm^4 g^2,
510  defined as \f$ 1.166364 \times 10^{-5}~\mathrm{GeV}^{-2} \f$
511  (CODATA 2010 value)
512  */
513  const double Gfermi=1.166364e-23/electron_volt/electron_volt;
514 }
515 
516 /** \brief Constants in MKS units
517 
518  See also documentation at \ref o2scl_cgs .
519 */
520 namespace o2scl_mks {
521  /// Heliocentric gravitational constant in m^3 / s^2 (from \ref Luzum11)
522  const double helgc_tcb=1.3712442099;
523  /// Heliocentric gravitational constant in m^3 / s^2 (from \ref Luzum11)
524  const double helgc_tdb=1.3712440041;
525  /// m
526  const double schwarzchild_radius=2.95325008e3;
527  /// m / s
528  const double speed_of_light=2.99792458e8;
529  /// Newtonian constant of gravitation in m^3 / kg s^2 (CODATA 2010 value)
530  const double gravitational_constant=6.67384e-11;
531  /// Planck constant in kg m^2 / s (CODATA 2010 value)
532  const double plancks_constant_h=6.62606957e-34;
533  /// Planck constant divided by 2 pi in kg m^2 / s (CODATA 2010 value)
535  2.0/o2scl_const::pi;
536  /// Astronomical unit in m (IAU 2009 value; now exact)
537  const double astronomical_unit=1.49597870700e11;
538  /// m
539  const double light_year=9.46053620707e15;
540  /// m
541  const double parsec=3.08567758135e16;
542  /// m / s^2
543  const double grav_accel=9.80665e0;
544  /// Electron volt in kg m^2 / s^2 (CODATA 2010 value)
545  const double electron_volt=1.602176565e-19;
546  /// Electron mass in kg (CODATA 2010 value)
547  const double mass_electron=9.10938291e-31;
548  /// Muon mass in kg (CODATA 2010 value)
549  const double mass_muon=1.883531475e-28;
550  /// Proton mass in kg (CODATA 2010 value)
551  const double mass_proton=1.672621777e-27;
552  /// Neutron mass in kg (CODATA 2010 value)
553  const double mass_neutron=1.674927351e-27;
554 
555  /// Deuteron mass in kg (CODATA 2010 value)
556  const double mass_deuteron=3.34358348e-27;
557  /// Triton mass in kg (CODATA 2010 value)
558  const double mass_triton=5.00735630e-27;
559  /// Helion mass in kg (CODATA 2010 value)
560  const double mass_helion=5.00641234e-27;
561  /// Alpha particle mass in kg (CODATA 2010 value)
562  const double mass_alpha=6.64465675e-27;
563 
564  /// Rydberg constant in kg m^2 / s^2 (CODATA 2010 value)
565  const double rydberg=2.179872171e-18;
566  /// Boltzmann constant in kg m^2 / K s^2 (CODATA 2010 value)
567  const double boltzmann=1.3806488e-23;
568  /// Bohr magneton in A m^2 (CODATA 2010 value)
569  const double bohr_magneton=9.27400968e-24;
570  /// A m^2
571  const double nuclear_magneton=5.05078317e-27;
572  /// A m^2
573  const double electron_magnetic_moment=9.28476362e-24;
574  /// A m^2
575  const double proton_magnetic_moment=1.410606633e-26;
576  /// kg m^2 / K mol s^2
577  const double molar_gas=8.314472e0;
578  /// m^3 / mol
579  const double standard_gas_volume=2.2710981e-2;
580  /// s
581  const double minute=6e1;
582  /// s
583  const double hour=3.6e3;
584  /// s
585  const double day=8.64e4;
586  /// s
587  const double week=6.048e5;
588  /// m
589  const double inch=2.54e-2;
590  /// m
591  const double foot=3.048e-1;
592  /// m
593  const double yard=9.144e-1;
594  /// m
595  const double mile=1.609344e3;
596  /// m
597  const double nautical_mile=1.852e3;
598  /// m
599  const double fathom=1.8288e0;
600  /// m
601  const double mil=2.54e-5;
602  /// m
603  const double point=3.52777777778e-4;
604  /// m
605  const double texpoint=3.51459803515e-4;
606  /// m
607  const double micron=1e-6;
608  /// m
609  const double angstrom=1e-10;
610  /// m^2
611  const double hectare=1e4;
612  /// m^2
613  const double acre=4.04685642241e3;
614  /// m^2
615  const double barn=1e-28;
616  /// m^3
617  const double liter=1e-3;
618  /// m^3
619  const double us_gallon=3.78541178402e-3;
620  /// m^3
621  const double quart=9.46352946004e-4;
622  /// m^3
623  const double pint=4.73176473002e-4;
624  /// m^3
625  const double cup=2.36588236501e-4;
626  /// m^3
627  const double fluid_ounce=2.95735295626e-5;
628  /// m^3
629  const double tablespoon=1.47867647813e-5;
630  /// m^3
631  const double teaspoon=4.92892159375e-6;
632  /// m^3
633  const double canadian_gallon=4.54609e-3;
634  /// m^3
635  const double uk_gallon=4.546092e-3;
636  /// m / s
637  const double miles_per_hour=4.4704e-1;
638  /// m / s
639  const double kilometers_per_hour=2.77777777778e-1;
640  /// m / s
641  const double knot=5.14444444444e-1;
642  /// kg
643  const double pound_mass=4.5359237e-1;
644  /// kg
645  const double ounce_mass=2.8349523125e-2;
646  /// kg
647  const double ton=9.0718474e2;
648  /// kg
649  const double metric_ton=1e3;
650  /// kg
651  const double uk_ton=1.0160469088e3;
652  /// kg
653  const double troy_ounce=3.1103475e-2;
654  /// kg
655  const double carat=2e-4;
656  /// Atomic mass constant in kg (CODATA 2010 value)
657  const double unified_atomic_mass=1.660538921e-27;
658  /// kg m / s^2
659  const double gram_force=9.80665e-3;
660  /// kg m / s^2
661  const double pound_force=4.44822161526e0;
662  /// kg m / s^2
663  const double kilopound_force=4.44822161526e3;
664  /// kg m / s^2
665  const double poundal=1.38255e-1;
666  /// kg m^2 / s^2
667  const double calorie=4.1868e0;
668  /// kg m^2 / s^2
669  const double btu=1.05505585262e3;
670  /// kg m^2 / s^2
671  const double therm=1.05506e8;
672  /// kg m^2 / s^3
673  const double horsepower=7.457e2;
674  /// kg / m s^2
675  const double bar=1e5;
676  /// kg / m s^2
677  const double std_atmosphere=1.01325e5;
678  /// kg / m s^2
679  const double torr=1.33322368421e2;
680  /// kg / m s^2
681  const double meter_of_mercury=1.33322368421e5;
682  /// kg / m s^2
683  const double inch_of_mercury=3.38638815789e3;
684  /// kg / m s^2
685  const double inch_of_water=2.490889e2;
686  /// kg / m s^2
687  const double psi=6.89475729317e3;
688  /// kg m^-1 s^-1
689  const double poise=1e-1;
690  /// m^2 / s
691  const double stokes=1e-4;
692  /// A s / mol
693  const double faraday=9.64853429775e4;
694  /// A s
695  const double electron_charge=1.602176565e-19;
696  /// kg / A s^2
697  const double gauss=1e-4;
698  /// cd / m^2
699  const double stilb=1e4;
700  /// cd sr
701  const double lumen=1e0;
702  /// cd sr / m^2
703  const double lux=1e0;
704  /// cd sr / m^2
705  const double phot=1e4;
706  /// cd sr / m^2
707  const double footcandle=1.076e1;
708  /// cd sr / m^2
709  const double lambert=1e4;
710  /// cd sr / m^2
711  const double footlambert=1.07639104e1;
712  /// 1 / s
713  const double curie=3.7e10;
714  /// A s / kg
715  const double roentgen=2.58e-4;
716  /// m^2 / s^2
717  const double rad=1e-2;
718  /// kg
719  const double solar_mass=1.9884e30;
720  /// m
721  const double bohr_radius=5.291772083e-11;
722  /// kg m / s^2
723  const double newton=1e0;
724  /// kg m / s^2
725  const double dyne=1e-5;
726  /// kg m^2 / s^2
727  const double joule=1e0;
728  /// kg m^2 / s^2
729  const double erg=1e-7;
730  /// kg / K^4 s^3
731  const double stefan_boltzmann_constant=5.67039934436e-8;
732  /// m^2
733  const double thomson_cross_section=6.65245853542e-29;
734  /// A^2 s^4 / kg m^3
735  const double vacuum_permittivity=8.854187817e-12;
736  /// kg m / A^2 s^2
737  const double vacuum_permeability=1.25663706144e-6;
738  /** \brief Fermi coupling constant in s^4 / cm^4 g^2,
739  defined as \f$ 1.166364 \times 10^{-5}~\mathrm{GeV}^{-2} \f$
740  (CODATA 2010 value)
741  */
742  const double Gfermi=1.166364e-23/electron_volt/electron_volt;
743 }
744 
745 /** \brief Constants in MKSA units
746 
747  See also documentation at \ref o2scl_cgs .
748 */
749 namespace o2scl_mksa {
750  /// Heliocentric gravitational constant in m^3 / s^2 (from \ref Luzum11)
751  const double helgc_tcb=1.3712442099;
752  /// Heliocentric gravitational constant in m^3 / s^2 (from \ref Luzum11)
753  const double helgc_tdb=1.3712440041;
754  /// m
755  const double schwarzchild_radius=2.95325008e3;
756  /// m / s
757  const double speed_of_light=2.99792458e8;
758  /// Newtonian constant of gravitation in m^3 / kg s^2 (CODATA 2010 value)
759  const double gravitational_constant=6.67384e-11;
760  /// Planck constant in kg m^2 / s (CODATA 2010 value)
761  const double plancks_constant_h=6.62606957e-34;
762  /// Planck constant divided by 2 pi in kg m^2 / s (CODATA 2010 value)
764  2.0/o2scl_const::pi;
765  /// Astronomical unit in m (IAU 2009 value; now exact)
766  const double astronomical_unit=1.49597870700e11;
767  /// m
768  const double light_year=9.46053620707e15;
769  /// m
770  const double parsec=3.08567758135e16;
771  /// m / s^2
772  const double grav_accel=9.80665e0;
773  /// Electron volt in kg m^2 / s^2 (CODATA 2010 value)
774  const double electron_volt=1.602176565e-19;
775  /// Electron mass in kg (CODATA 2010 value)
776  const double mass_electron=9.10938291e-31;
777  /// Muon mass in kg (CODATA 2010 value)
778  const double mass_muon=1.883531475e-28;
779  /// Proton mass in kg (CODATA 2010 value)
780  const double mass_proton=1.672621777e-27;
781  /// Neutron mass in kg (CODATA 2010 value)
782  const double mass_neutron=1.674927351e-27;
783 
784  /// Deuteron mass in kg (CODATA 2010 value)
785  const double mass_deuteron=3.34358348e-27;
786  /// Triton mass in kg (CODATA 2010 value)
787  const double mass_triton=5.00735630e-27;
788  /// Helion mass in kg (CODATA 2010 value)
789  const double mass_helion=5.00641234e-27;
790  /// Alpha particle mass in kg (CODATA 2010 value)
791  const double mass_alpha=6.64465675e-27;
792 
793  /// Rydberg constant in kg m^2 / s^2 (CODATA 2010 value)
794  const double rydberg=2.179872171e-18;
795  /// Boltzmann constant in kg m^2 / K s^2 (CODATA 2010 value)
796  const double boltzmann=1.3806488e-23;
797  /// Bohr magneton in A m^2 (CODATA 2010 value)
798  const double bohr_magneton=9.27400968e-24;
799  /// A m^2
800  const double nuclear_magneton=5.05078317e-27;
801  /// A m^2
802  const double electron_magnetic_moment=9.28476362e-24;
803  /// A m^2
804  const double proton_magnetic_moment=1.410606633e-26;
805  /// kg m^2 / K mol s^2
806  const double molar_gas=8.314472e0;
807  /// m^3 / mol
808  const double standard_gas_volume=2.2710981e-2;
809  /// s
810  const double minute=6e1;
811  /// s
812  const double hour=3.6e3;
813  /// s
814  const double day=8.64e4;
815  /// s
816  const double week=6.048e5;
817  /// m
818  const double inch=2.54e-2;
819  /// m
820  const double foot=3.048e-1;
821  /// m
822  const double yard=9.144e-1;
823  /// m
824  const double mile=1.609344e3;
825  /// m
826  const double nautical_mile=1.852e3;
827  /// m
828  const double fathom=1.8288e0;
829  /// m
830  const double mil=2.54e-5;
831  /// m
832  const double point=3.52777777778e-4;
833  /// m
834  const double texpoint=3.51459803515e-4;
835  /// m
836  const double micron=1e-6;
837  /// m
838  const double angstrom=1e-10;
839  /// m^2
840  const double hectare=1e4;
841  /// m^2
842  const double acre=4.04685642241e3;
843  /// m^2
844  const double barn=1e-28;
845  /// m^3
846  const double liter=1e-3;
847  /// m^3
848  const double us_gallon=3.78541178402e-3;
849  /// m^3
850  const double quart=9.46352946004e-4;
851  /// m^3
852  const double pint=4.73176473002e-4;
853  /// m^3
854  const double cup=2.36588236501e-4;
855  /// m^3
856  const double fluid_ounce=2.95735295626e-5;
857  /// m^3
858  const double tablespoon=1.47867647813e-5;
859  /// m^3
860  const double teaspoon=4.92892159375e-6;
861  /// m^3
862  const double canadian_gallon=4.54609e-3;
863  /// m^3
864  const double uk_gallon=4.546092e-3;
865  /// m / s
866  const double miles_per_hour=4.4704e-1;
867  /// m / s
868  const double kilometers_per_hour=2.77777777778e-1;
869  /// m / s
870  const double knot=5.14444444444e-1;
871  /// kg
872  const double pound_mass=4.5359237e-1;
873  /// kg
874  const double ounce_mass=2.8349523125e-2;
875  /// kg
876  const double ton=9.0718474e2;
877  /// kg
878  const double metric_ton=1e3;
879  /// kg
880  const double uk_ton=1.0160469088e3;
881  /// kg
882  const double troy_ounce=3.1103475e-2;
883  /// kg
884  const double carat=2e-4;
885  /// Atomic mass constant in kg (CODATA 2010 value)
886  const double unified_atomic_mass=1.660538921e-27;
887  /// kg m / s^2
888  const double gram_force=9.80665e-3;
889  /// kg m / s^2
890  const double pound_force=4.44822161526e0;
891  /// kg m / s^2
892  const double kilopound_force=4.44822161526e3;
893  /// kg m / s^2
894  const double poundal=1.38255e-1;
895  /// kg m^2 / s^2
896  const double calorie=4.1868e0;
897  /// kg m^2 / s^2
898  const double btu=1.05505585262e3;
899  /// kg m^2 / s^2
900  const double therm=1.05506e8;
901  /// kg m^2 / s^3
902  const double horsepower=7.457e2;
903  /// kg / m s^2
904  const double bar=1e5;
905  /// kg / m s^2
906  const double std_atmosphere=1.01325e5;
907  /// kg / m s^2
908  const double torr=1.33322368421e2;
909  /// kg / m s^2
910  const double meter_of_mercury=1.33322368421e5;
911  /// kg / m s^2
912  const double inch_of_mercury=3.38638815789e3;
913  /// kg / m s^2
914  const double inch_of_water=2.490889e2;
915  /// kg / m s^2
916  const double psi=6.89475729317e3;
917  /// kg m^-1 s^-1
918  const double poise=1e-1;
919  /// m^2 / s
920  const double stokes=1e-4;
921  /// A s / mol
922  const double faraday=9.64853429775e4;
923  /// A s
924  const double electron_charge=1.602176565e-19;
925  /// kg / A s^2
926  const double gauss=1e-4;
927  /// cd / m^2
928  const double stilb=1e4;
929  /// cd sr
930  const double lumen=1e0;
931  /// cd sr / m^2
932  const double lux=1e0;
933  /// cd sr / m^2
934  const double phot=1e4;
935  /// cd sr / m^2
936  const double footcandle=1.076e1;
937  /// cd sr / m^2
938  const double lambert=1e4;
939  /// cd sr / m^2
940  const double footlambert=1.07639104e1;
941  /// 1 / s
942  const double curie=3.7e10;
943  /// A s / kg
944  const double roentgen=2.58e-4;
945  /// m^2 / s^2
946  const double rad=1e-2;
947  /// kg
948  const double solar_mass=1.9884e30;
949  /// m
950  const double bohr_radius=5.291772083e-11;
951  /// kg m / s^2
952  const double newton=1e0;
953  /// kg m / s^2
954  const double dyne=1e-5;
955  /// kg m^2 / s^2
956  const double joule=1e0;
957  /// kg m^2 / s^2
958  const double erg=1e-7;
959  /// kg / K^4 s^3
960  const double stefan_boltzmann_constant=5.67039934436e-8;
961  /// m^2
962  const double thomson_cross_section=6.65245853542e-29;
963  /// A^2 s^4 / kg m^3
964  const double vacuum_permittivity=8.854187817e-12;
965  /// kg m / A^2 s^2
966  const double vacuum_permeability=1.25663706144e-6;
967  /** \brief Fermi coupling constant in s^4 / cm^4 g^2,
968  defined as \f$ 1.166364 \times 10^{-5}~\mathrm{GeV}^{-2} \f$
969  (CODATA 2010 value)
970  */
971  const double Gfermi=1.166364e-23/electron_volt/electron_volt;
972 }
973 
974 // Other derived values to add to the namespace
975 namespace o2scl_const {
976 
977  /// \f$ \hbar c \f$ in MeV fm (derived)
980 
981  /// \f$ \hbar c \f$ in MeV cm (derived)
982  const double hc_mev_cm=hc_mev_fm*1.0e-13;
983 
984  /** \name Squared electron charge
985  */
986  //@{
987  /** \brief Electron charge squared in Gaussian units (derived)
988 
989  In Gaussian Units:
990  \f{eqnarray*}
991  &\vec{\nabla} \cdot \vec{E} = 4 \pi \rho \, ,
992  \quad
993  \vec{E}=-\vec{\nabla} \Phi \, ,
994  \quad
995  \nabla^2 \Phi = - 4 \pi \rho \, ,
996  &\\&
997  F=\frac{q_1 q_2}{r^2} \, ,
998  \quad
999  W=\frac{1}{2} \int \rho V d^3 x
1000  =\frac{1}{8 \pi} \int | \vec{E} |^2 d^3 x \, ,
1001  \quad
1002  \alpha=\frac{e^2}{\hbar c}=\frac{1}{137}&
1003  \f}
1004  */
1007 
1008  /** \brief Electron charge sqaured in
1009  Heaviside-Lorentz units where \f$\hbar=c=1\f$ (derived)
1010 
1011  In Heaviside-Lorentz units:
1012  \f{eqnarray*}
1013  &\vec{\nabla} \cdot \vec{E} = \rho \, ,
1014  \quad
1015  \vec{E}=-\vec{\nabla} \Phi \, ,
1016  \quad
1017  \nabla^2 \Phi = - \rho \, ,
1018  &\\&
1019  F=\frac{q_1 q_2}{4 \pi r^2} \, ,
1020  \quad
1021  W=\frac{1}{2} \int \rho V d^3 x
1022  =\frac{1}{2} \int | \vec{E} |^2 d^3 x \, ,
1023  \quad
1024  \alpha=\frac{e^2}{4 \pi}=\frac{1}{137}&
1025  \f}
1026  */
1027  const double e2_hlorentz=o2scl_const::fine_structure*4.0*pi;
1028 
1029  /** \brief Electron charge squared in SI(MKSA) units (derived)
1030 
1031  In MKSA units:
1032  \f{eqnarray*}
1033  &\vec{\nabla} \cdot \vec{E} = \rho \, ,
1034  \quad
1035  \vec{E}=-\vec{\nabla} \Phi \, ,
1036  \quad
1037  \nabla^2 \Phi = - \rho \, ,
1038  &\\&
1039  F=\frac{1}{4 \pi \varepsilon_0}\frac{q_1 q_2}{r^2} \, ,
1040  \quad
1041  W=\frac{1}{2} \int \rho V d^3 x
1042  =\frac{\varepsilon_0}{2} \int | \vec{E} |^2 d^3 x \, ,
1043  \quad
1044  \alpha=\frac{e^2}{4 \pi \varepsilon_0 \hbar c}=\frac{1}{137}&
1045  \f}
1046 
1047  Note the conversion formulas
1048  \f[
1049  q_HL=\sqrt{4 \pi} q_G = \frac{1}{\sqrt{\varepsilon_0}} q_{SI}
1050  \f]
1051  as mentioned, e.g. in pg. 13 of D. Griffiths Intro to Elem. Particles.
1052  */
1054  //@}
1055 
1056  /** \brief 1 \f$\mathrm{Gauss}\f$ times the electron charge
1057  in Gaussian units in \f$\mathrm{fm}^{-2}\f$
1058  */
1061 
1062  /** \brief Conversion factor from \f$ \mathrm{Gauss}^2 \f$ to
1063  \f$\mathrm{fm}^{-4}\f$ in Gaussian units.
1064 
1065  This is useful, e.g. in converting magnetic field squared
1066  to an energy density.
1067  */
1068  const double gauss2_fm4=ec_gauss_fm2*ec_gauss_fm2/
1070 
1071 
1072  /** \brief \f$ \Lambda \f$ hyperon mass in \f$ \mathrm{MeV} \f$
1073 
1074  Value from PDG live (5/1/14).
1075  */
1076  const double mass_lambda_MeV=1115.683;
1077 }
1078 
1079 
1080 #endif
const double fluid_ounce
m^3
Definition: constants.h:856
const double kilopound_force
kg m / s^2
Definition: constants.h:892
const double light_year
m
Definition: constants.h:768
const double miles_per_hour
m / s
Definition: constants.h:866
const double dyne
kg m / s^2
Definition: constants.h:954
const double inch_of_water
kg / m s^2
Definition: constants.h:914
const double poundal
kg m / s^2
Definition: constants.h:894
const double us_gallon
m^3
Definition: constants.h:848
const double uk_ton
kg
Definition: constants.h:880
const double plancks_constant_h
Planck constant in kg m^2 / s (CODATA 2010 value)
Definition: constants.h:761
const double barn
m^2
Definition: constants.h:844
const double standard_gas_volume
m^3 / mol
Definition: constants.h:808
Constants in CGS units.
Definition: constants.h:94
const double tablespoon
m^3
Definition: constants.h:858
const double cup
m^3
Definition: constants.h:854
const double hc_mev_cm
in MeV cm (derived)
Definition: constants.h:982
const double calorie
kg m^2 / s^2
Definition: constants.h:896
const double electron_magnetic_moment
A m^2.
Definition: constants.h:802
const double footcandle
cd sr / m^2
Definition: constants.h:936
const double angstrom
m
Definition: constants.h:838
const double pi
Definition: constants.h:62
const double curie
1 / s
Definition: constants.h:942
const double mile
m
Definition: constants.h:824
const double astronomical_unit
Astronomical unit in m (IAU 2009 value; now exact)
Definition: constants.h:766
const double mass_neutron
Neutron mass in kg (CODATA 2010 value)
Definition: constants.h:782
const double electron_volt
Electron volt in kg m^2 / s^2 (CODATA 2010 value)
Definition: constants.h:774
const double mass_muon
Muon mass in kg (CODATA 2010 value)
Definition: constants.h:778
const double e2_hlorentz
Electron charge sqaured in Heaviside-Lorentz units where (derived)
Definition: constants.h:1027
const double mass_proton
Proton mass in kg (CODATA 2010 value)
Definition: constants.h:780
const double footlambert
cd sr / m^2
Definition: constants.h:940
const double plancks_constant_hbar
Planck constant divided by 2 pi in kg m^2 / s (CODATA 2010 value)
Definition: constants.h:534
const double pound_force
kg m / s^2
Definition: constants.h:890
const double plancks_constant_h
Planck constant in g cm^2 / s (CODATA 2010 value)
Definition: constants.h:102
const double week
s
Definition: constants.h:816
const double zeta52
Definition: constants.h:70
const double plancks_constant_hbar
Planck constant divided by 2 pi in kg m^2 / s (CODATA 2010 value)
Definition: constants.h:763
const double mass_triton
Triton mass in kg (CODATA 2010 value)
Definition: constants.h:787
const double acre
m^2
Definition: constants.h:842
const double teaspoon
m^3
Definition: constants.h:860
const double solar_mass
kg
Definition: constants.h:948
const double psi
kg / m s^2
Definition: constants.h:916
const double ounce_mass
kg
Definition: constants.h:874
const double ton
kg
Definition: constants.h:876
const double hc_mev_fm
in MeV fm (derived)
Definition: constants.h:978
const double mass_electron
Electron mass in kg (CODATA 2010 value)
Definition: constants.h:776
const double joule
kg m^2 / s^2
Definition: constants.h:956
const double proton_magnetic_moment
A m^2.
Definition: constants.h:804
const double nuclear_magneton
A m^2.
Definition: constants.h:800
const double liter
m^3
Definition: constants.h:846
const double rad
m^2 / s^2
Definition: constants.h:946
const double e2_mksa
Electron charge squared in SI(MKSA) units (derived)
Definition: constants.h:1053
const double carat
kg
Definition: constants.h:884
const double mil
m
Definition: constants.h:830
const double newton
kg m / s^2
Definition: constants.h:952
const double zeta32
Definition: constants.h:66
Constants in MKS units.
Definition: constants.h:520
const double std_atmosphere
kg / m s^2
Definition: constants.h:906
const double parsec
m
Definition: constants.h:770
const double plancks_constant_h
Planck constant in g cm^2 / s (CODATA 2010 value)
Definition: constants.h:309
const double electron_volt
Electron volt in kg m^2 / s^2 (CODATA 2010 value)
Definition: constants.h:545
const double meter_of_mercury
kg / m s^2
Definition: constants.h:910
const double e2_gaussian
Electron charge squared in Gaussian units (derived)
Definition: constants.h:1005
const double gram_force
kg m / s^2
Definition: constants.h:888
const double plancks_constant_h
Planck constant in kg m^2 / s (CODATA 2010 value)
Definition: constants.h:532
const double fine_structure
Fine structure constant (CODATA 2010 value)
Definition: constants.h:56
const double faraday
A s / mol.
Definition: constants.h:922
const double zeta5
Definition: constants.h:74
const double zeta7
Definition: constants.h:76
Constants in CGSM units.
Definition: constants.h:301
const double roentgen
A s / kg.
Definition: constants.h:944
const double hour
s
Definition: constants.h:812
const double lux
cd sr / m^2
Definition: constants.h:932
const double stefan_boltzmann_constant
kg / K^4 s^3
Definition: constants.h:960
const double foot
m
Definition: constants.h:820
const double knot
m / s
Definition: constants.h:870
const double micron
m
Definition: constants.h:836
const double zeta3
Definition: constants.h:72
const double day
s
Definition: constants.h:814
const double helgc_tcb
Heliocentric gravitational constant in m^3 / s^2 (from Luzum11)
Definition: constants.h:751
const double nautical_mile
m
Definition: constants.h:826
const double kilometers_per_hour
m / s
Definition: constants.h:868
const double horsepower
kg m^2 / s^3
Definition: constants.h:902
const double stokes
m^2 / s
Definition: constants.h:920
const double btu
kg m^2 / s^2
Definition: constants.h:898
const double mass_helion
Helion mass in kg (CODATA 2010 value)
Definition: constants.h:789
const double stilb
cd / m^2
Definition: constants.h:928
const double yard
m
Definition: constants.h:822
const double inch_of_mercury
kg / m s^2
Definition: constants.h:912
const double thomson_cross_section
m^2
Definition: constants.h:962
const double point
m
Definition: constants.h:832
const double sin2_theta_weak
(PDG 2014 value)
Definition: constants.h:79
const double Gfermi
Fermi coupling constant in s^4 / cm^4 g^2, defined as (CODATA 2010 value)
Definition: constants.h:971
const double hectare
m^2
Definition: constants.h:840
const double zeta2
Definition: constants.h:68
const double unified_atomic_mass
Atomic mass constant in kg (CODATA 2010 value)
Definition: constants.h:886
const double minute
s
Definition: constants.h:810
const double mass_deuteron
Deuteron mass in kg (CODATA 2010 value)
Definition: constants.h:785
const double fathom
m
Definition: constants.h:828
const double electron_charge
A s.
Definition: constants.h:924
const double vacuum_permeability
kg m / A^2 s^2
Definition: constants.h:966
const double bohr_radius
m
Definition: constants.h:950
const double rydberg
Rydberg constant in kg m^2 / s^2 (CODATA 2010 value)
Definition: constants.h:794
const double canadian_gallon
m^3
Definition: constants.h:862
const double metric_ton
kg
Definition: constants.h:878
const double texpoint
m
Definition: constants.h:834
const double bar
kg / m s^2
Definition: constants.h:904
const double torr
kg / m s^2
Definition: constants.h:908
const double phot
cd sr / m^2
Definition: constants.h:934
const double speed_of_light
m / s
Definition: constants.h:528
const double poise
kg m^-1 s^-1
Definition: constants.h:918
const double quart
m^3
Definition: constants.h:850
const double boltzmann
Boltzmann constant in kg m^2 / K s^2 (CODATA 2010 value)
Definition: constants.h:796
const double gravitational_constant
Newtonian constant of gravitation in m^3 / kg s^2 (CODATA 2010 value)
Definition: constants.h:759
const double lumen
cd sr
Definition: constants.h:930
Constants.
Definition: constants.h:35
const double erg
kg m^2 / s^2
Definition: constants.h:958
const double lambert
cd sr / m^2
Definition: constants.h:938
const double electron_charge
A s.
Definition: constants.h:695
const double bohr_magneton
Bohr magneton in A m^2 (CODATA 2010 value)
Definition: constants.h:798
const double avogadro
Avogadro&#39;s number (CODATA 2010 value)
Definition: constants.h:59
const double troy_ounce
kg
Definition: constants.h:882
const double pint
m^3
Definition: constants.h:852
const double molar_gas
kg m^2 / K mol s^2
Definition: constants.h:806
const double gauss2_fm4
Conversion factor from to in Gaussian units.
Definition: constants.h:1068
const double mass_alpha
Alpha particle mass in kg (CODATA 2010 value)
Definition: constants.h:791
const double grav_accel
m / s^2
Definition: constants.h:772
const double ec_gauss_fm2
1 times the electron charge in Gaussian units in
Definition: constants.h:1059
const double vacuum_permittivity
A^2 s^4 / kg m^3.
Definition: constants.h:964
const double helgc_tdb
Heliocentric gravitational constant in m^3 / s^2 (from Luzum11)
Definition: constants.h:753
const double gauss
kg / A s^2
Definition: constants.h:926
const double pound_mass
kg
Definition: constants.h:872
const double uk_gallon
m^3
Definition: constants.h:864
const double mass_lambda_MeV
hyperon mass in
Definition: constants.h:1076
const double therm
kg m^2 / s^2
Definition: constants.h:900
const double schwarzchild_radius
m
Definition: constants.h:755
const double inch
m
Definition: constants.h:818
Constants in MKSA units.
Definition: constants.h:749
const double speed_of_light
m / s
Definition: constants.h:757
const double pi2
Definition: constants.h:64

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