Library Articles
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