Constants
Staff posted on October 20, 2006 |
Constants
 Gravitational Acceleration (Sea Level): Avogadro’s Number: g = 9.807 m/s2 N = 6.024 x 1023  molecules/mol Planck’s Constant: Boltzmann’s Constant: h = 6.625 x 10-34 J · s/molecule k = 1.380 x 10-23 J/K · molecule Speed of Light in Vacuum: Stefan-Boltzmann Constant: c0 = 2.998 x 108 m/s σ = 5.670 x 10-8 W/m2 K4      = 0.1714 x 10-8 Btu/h · ft2 · °R 4 Blackbody Radiation Constants: Universal Gas Constant: C1 = 3.7420 x 108 W · μm4/m2       = 1.187 x 108 Btu/h · μm4/h · ft2 C2 = 1.4388 x 104 · μm · K       = 2.5897 x 104 · μm · °R C3 = 2897.8 μm · K       = 5215.6 μmm · °R R = 8.205 x 10-2 m3 · atm/kmol · K     = 8.314 x 10-2 m3 · bar/kmol · K     = 8.315 kJ/kmol · K     = 1545 ft · lbf /lbmole · °R     = 1.986 Btu/lbmole · °R Normal Atmospheric Pressure: p = 101,325 N/m2
Excerpt from: Incroprera, Frank and De Witt, David P. Introduction to Heat Transfer. Second Edition. New York: John Wiley & Sons, Inc. 1985, 1990.

Copyright © 1985, 1990, by John Wiley & Sons, Inc.

This material is used by permission of John Wiley & Sons, Inc.
 Principal Units in Mechanics
 Quantity Unit Symbol Formula Acceleration Meter per second squared ... m/s2 Angle Radian rad Angular acceleration Radian per second squared ... rad/s2 Angular velocity Radian per second ... rad/s Area Square meter ... m2 Density Kilogram per cubic meter ... kg/m2 Energy Joule J N m Force Newton N kg m/s2 Frequency Hertz Hz s-1 Impulse Newton-second ... kg m/s Length Meter m Mass Kilogram kg Moment of a force Newtonmeter ... N m Power Watt W J/s Pressure Pascal bra N/m 2 Stress Pascal bra N/m 2 Time Second S Velocity Meter per second ... m/s Volume, solids Cubic meter ... m3 Liquids Liter L 10-3m3 Work Joule J N m
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