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Inside Back Cover


Conversion of units – stress and pressure⁎





























































MN m− 2 dyn cm− 2 lb in− 2 kgf mm− 2 bar long ton in− 2
MN m− 2 1 107 1.45 × 102 0.102 10 6.48 × 10− 2
dyn cm− 2 10− 7 1 1.45 × 10− 5 1.02 × 10− 8 10− 6 6.48 × 10− 9
lb in− 2 6.89 × 10− 3 6.89 × 104 1 7.03 × 10− 4 6.89 × 10− 2 4.46 × 10− 4
kgf mm− 2 9.81 9.81 × 107 1.42 × 103 1 98.1 63.5 × 10− 2
bar 0.10 106 14.48 1.02 × 10− 2 1 6.48 × 10− 3
long ton in− 2 15.44 1.54 × 108 2.24 × 103 1.54 1.54 × 102 1


Unlabelled Table


Conversion of units – energy⁎





























































J erg cal eV BThU ft lbf
J 1 107 0.239 6.24 × 1018 9.48 × 10− 4 0.738
erg 10− 7 1 2.39 × 10− 8 6.24 × 1011 9.48 × 10− 11 7.38 × 10− 8
cal 4.19 4.19 × 107 1 2.61 × 1019 3.97 × 10− 3 3.09
eV 1.60 × 10− 19 1.60 × 10− 12 3.83 × 10− 20 1 1.52 × 10− 22 1.18 × 10− 19
BThU 1.06 × 103 1.06 × 1010 2.52 × 102 6.59 × 1021 1 7.78 × 102
ft lbf 1.36 1.36 × 107 0.324 8.46 × 1018 1.29 × 10− 3 1


t0015


1 kWh = 3.600 MJ. 1 ton coal = 8000 kWh (thermal) = 2500 kWh (electric)


1 barrel oil (0.133 ton) = 0.23 tce (ton coal equivalent). 1 ton oil = 1.7 tce


Conversion of units – power⁎



































kW erg s− 1 hp ft lbf s− 1
kW (kJ s− 1) 1 1010 1.34 7.38 × 102
erg s− 1 10− 10 1 1.34 × 10− 10 7.38 × 10− 8
hp 7.46 × 10− 1 7.46 × 109 1 5.50 × 102
ft lbf s− 1 1.36 × 10− 3 1.36 × 107 1.82 × 10− 3 1


t0020



⁎ To convert row unit to column unit, multiply it by the number at the row–column intersection: for example, 1 MN m− 2 = 10 bar

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Aug 9, 2021 | Posted by in General Engineer | Comments Off on Back Cover
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