E1FC 09/10/2010
14:33:4 Page 12
MOMENT OR TORQUE
1 lb-ft ¼ 1.3558 N-m
POWER
1 W
¼ 1.0 J/s ¼ 860.42 cal/hr
1 hp
¼ 550.0 ft-lb/s ¼ 745.6998 W
1 kW ¼ 1 Â 10
3 W
1 Btu/hr ¼ 778.1692 ft-lb/hr ¼ 0.2931 W
ENERGY
1 J
¼ 1.0 N-m ¼ 1 Â 10
7 ergs
1 erg ¼ 1 dyne-cm
1 cal ¼ 4.1868 J
1 ft-lb ¼ 1.3558 J
1 Btu ¼ 1055.0558 J
VISCOSITY
1 lb-s/ft
2
¼ 47.8790 N-s/m
2
1 centipoise ¼ 0.01 dyne-s/cm
2
¼ 0.001 Pa-s
SPECIFIC HEAT
1 Btu/lb m -
F ¼ 4.1868 kJ/kgGAS CONSTANT
1 ft-lb/lb m -
R ¼ 5.382 J/kg-K
THERMAL CONDUCTIVITY
F ¼ 1.7295 W/mHEAT TRANSFER COEFFICIENT
1 Btu/hr-ft
2 -
F ¼ 5.6786 W/m
2 -
C
BULK MODULUS
1 Â 10
6 psi ¼ 6.895 Â 10
9 Pa
PHYSICAL CONSTANTS
Standard Acceleration of Gravity
g ¼ 9.80665 m/s
2
¼ 32.1742 ft/s
2
Speed of Light
c ¼ 2.998 Â 10
8 m/s
Planck’s Constant
h p ¼ 6.6261 Â 10
À34 J-s
Stefan-Boltzmann Constant
s ¼ 5:6704 Â 10
À8 W/m
2 -K
4
¼ 0:1712 Â 10
À8 Btu/h-ft
2 -
R
4
Universal Gas Constant
R ¼ 8:3143 J/gmole-K