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Engineering LibreTexts

7.4: Unit Conversion Factors

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Density 1 Mg/m3=1gm/cm3=62.42lb/ft3=0.03613lb/in3=102.0N/m3
Energy 1 J=0.2390calorie=9.45×104Btu=107erg=0.7376ftlb=6.250×1018ev
Force 1 N=105d (dyne)=0.2248lbf=0.1020kg=3.597oz=1.124×104ton (2000lb)
Length 1 m=39.37in=3.281ft=1010˙A
Mass 1 kg=2.205lb=35.27oz=1.102×103ton (2000lb)
Power 1 W=1J/s=0.7378ftlb/s=1.341×103hp
Stress 1 Pa=1N/m2=10d/cm2=1.449×104psi=1.020×107kg/mm2
Toughness 1 MPam=0.910 ksiin

Physical constants:

Boltzman constant k=1.381×1023 J/K

Gas constant R=8.314 J/molK

Avogadro constant NA=6.022×1023 /mol

Acceleration of gravity g=9.805 m/s2


This page titled 7.4: Unit Conversion Factors is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by David Roylance (MIT OpenCourseWare) via source content that was edited to the style and standards of the LibreTexts platform.

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