| Fundamental Physical and Mathematical Constants | ||||||
| Name | symbol | English | SI | |||
| Mathematical | ||||||
| Archimedes number | p | 3.141592654 | 3.141592654 | |||
| base of natural logs | e | 2.718281829 | 2.718281829 | |||
| Euler constant | C or t | 0.577215665 | 0.577215665 | |||
| catalan constant | G | 1.644936903 | 1.644936903 | |||
| Charge | ||||||
| electron | e | -1.6022x10-19C | ||||
| proton | p | 1.6021x10-19C | ||||
| Density | ||||||
| air[STP][32oF, (0oC)] | .0805 lbm/ft3 | 1.29 kg/m3 | ||||
| air[1atm][70oF, (20oC)] | .0749 lbm/ft3 | 1.20 kg/m3 | ||||
| earth[mean] | 345 lbm/ft3 | 5520 kg/m3 | ||||
| mercury | 849 lbm/ft3 | 1.36x104 kg/m3 | ||||
| sea water | 64 lbm/ft3 | 1025 kg/m3 | ||||
| water [mean] | 62.4 lbm/ft3 | 1000 kg/m3 | ||||
| Distance [mean] | ||||||
| earth radius | 2.09x107 ft | 6.37x106 m | ||||
| earth-moon seperation | 1.26x109 ft | 3.84x108 m | ||||
| earth sun seperation | 4.89x1011 ft | 1.49x1011 m | ||||
| moon radius | 5.71x106ft | 1.74x106 m | ||||
| sun radius | 2.28x109 ft | 6.96x108 m | ||||
| first Bohr radius | ao | 1.736x10-10 ft | 5.292x10-11 m | |||
| Gravitational Acceleration | ||||||
| earth [mean] | g | 32.174ft/sec2 | 9.8067 m/s2 | |||
| moon [mean] | 5.47 ft/sec2 | 1.67 m/s2 | ||||
| Mass | ||||||
| atomic mass unit | u | 3.66x10-27 lbm | 1.6606x10-27kg | |||
| earth | 4.11x1023 slugs | 6x1024kg | ||||
| earth [customary] | 1.32x1025 lbm | n.a. | ||||
| electron[rest] | me | 2.088x10-30 lbm | 9.1095x10-31kg | |||
| moon | 1.623x1023 lbm | 7.36x1022kg | ||||
| neutron[rest] | mn | 3.693x10-27 lbm | 1.6750x10-27kg | |||
| proton [rest] | mp | 3.688x10-27 lbm | 1.6727x10-27kg | |||
| sun | 4.387x1030 lbm | 1.99x1030kg | ||||
| Pressure | ||||||
| atomospheric | 14.696 lbf/in2 | 1.0133x105 Pa | ||||
| Temperature | ||||||
| standard | 32oF, (492oR) | 0oC, (273oK) | ||||
| Velocity | ||||||
| earth escape | 3.67x104 ft/sec | 1.12x104 m/s | ||||
| light[vacuum] | c | 9.84x108 ft/sec | 2.9979x108 m/s | |||
| sound[air,STP] | a | 1090 ft/sec | 331 m/s | |||
| sound [air, 70oF, (20oC)] | 1130 ft/sec | 344 m/s | ||||
| Volume | ||||||
| molal idea gas[STP] | 359 ft3/lbmol | 22.41 m3/kmol | ||||
| Fundamental Constant | ||||||
| Avogadro's number | NA | 6.022x1023 mol-1 | ||||
| Bohr magneton | mB | 9.2732x10-24 J/T | ||||
| Boltzmann constant | k | 5.65x 10-24 ft-lbf/oR | 1.3805x10-23 J/K | |||
| Faraday constant | F | 96485 C/mol | ||||
| Gravitational constant | gc | 32.174 lbm-ft/lbf-sec2 | ||||
| Gravitational constant | G | 3.44x10-8ft4/lbf-sec4 | 6.672x10-11 N.m2/kg2 | |||
| nuclear magneton | mN | 5.05x10-27 J/T | ||||
| vacuum permeability | m0 | 1.2566x10-6 N/A2 | ||||
| vaccum permittivity | e0 | 8.854x10-12 C2/N m2 (H/m) | ||||
| Planck's constant | h | 6.6256x10-34 J.s (F/m) | ||||
| Rydberg constant | Rinfinity | 1.097x107 m-1 | ||||
| specific gas constant air | R | 53.3 ft-lbf/lbm-oR | 287 J/kg.K | |||
| Stefan-Boltzmann constant | 1.71x10-9 BTU/ft2-hr-oR4 | 5.670x10-8 W/m2.k4 | ||||
| triple point, water | R* | 32.02oF, .0888 psia | .001109oC, .06123 kPa | |||
| universal gas constant | R* | 1545 ft-lbf/lbmol-oR | 8314 J/kmol.K | |||
| 1.986 BTU/lbmol-oR | ||||||