7.4: Unit Conversion Factors
( \newcommand{\kernel}{\mathrm{null}\,}\)
Density | 1 Mg/m3=1gm/cm3=62.42lb/ft3=0.03613lb/in3=102.0N/m3 |
Energy | 1 J=0.2390calorie=9.45×10−4Btu=107erg=0.7376ft−lb=6.250×1018ev |
Force | 1 N=105d (dyne)=0.2248lbf=0.1020kg=3.597oz=1.124×10−4ton (2000lb) |
Length | 1 m=39.37in=3.281ft=1010˙A |
Mass | 1 kg=2.205lb=35.27oz=1.102×10−3ton (2000lb) |
Power | 1 W=1J/s=0.7378ft−lb/s=1.341×10−3hp |
Stress | 1 Pa=1N/m2=10d/cm2=1.449×10−4psi=1.020×10−7kg/mm2 |
Toughness | 1 MPa√m=0.910 ksi√in |
Physical constants:
Boltzman constant k=1.381×10−23 J/K
Gas constant R=8.314 J/mol−K
Avogadro constant NA=6.022×1023 /mol
Acceleration of gravity g=9.805 m/s2