Biomedical Engineering Reference
In-Depth Information
Appendix B
Physical Constants and
Unit Conversions
B1 PHYSICAL CONSTANTS
Atmospheric pressure
101.325/N/m
2
101.325/kPa
1.013/bar
Avogadro's number
6.022
10
23
/mol
Boltzmann's constant
1.380
3
10
2
23
/J/K
Gravitational acceleration (sea level), g
9.807/m/s
2
Planck's constant
6.625
3
10
2
34
/J s
Speed of light in vacuum
2.998
3
10
8
/m/s
Stefan
Boltzmann constant
5.670
3
10
2
8
/W/m
2
K
4
Universal gas constant, R
8.205
3
10
2
2
/m
3
atm/kmol K
10
2
2
/m
3
bar/kmol K
8.314
3
5
3
8.314/kJ/kmol K
5
282/N m/kg K
5
8.314/kPa m
3
/kmol K
5
1.98/kCal/kmol K
5
B2 SUMMARY OF COMMON CONVERSION UNITS
Length: 1m
10
2
3
km
10
10
Angstrom units
10
6
micron
39.370 inch
5
5
5
5
3.28084 ft
4.971 links
1.0936 yd
0.54681 fathoms
0.04971 chain
5
5
5
5
5
10
2
3
10
2
4
4.97097
furlong
5.3961
UK nautical miles
5
3
5
3
10
2
4
US nautical miles
10
2
4
miles
5.3996
6.2137
5
3
5
3
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