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Information, coverage of important developments and expert commentary in manufacturing.

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Guide for high quality and cost-effective plastic injection molding.

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Energy
Unit Name Symbol SI Equivalent 
· kiloelectronvolt 
keV  1.60218x10-16 J 
· kilojoule 
kJ  1000 J 
· kiloton TNT equivalent 
kt (TNT)  4.18x1012 J 
· kilowatt-hour 
kWh  3.6x106 J 
· megaelectronvolt 
MeV  1.60218x10-13 J 
· megajoule 
MJ  1x106 J 
· megaton TNT equivalent 
Mt (TNT)  4.18x1015 J 
· newton meter 
N-m  1 J 
· Q unit 
  1.055x1021 J 
· quad 
quad  1.05506x1018 J 
· quadrillion 
quad  1.05506x1018 J 
· rydberg 
Ry  2.17987x10-18 J 
· tce (tonne coal equivalent) 
tce  2.929x1010 J 
· therm (EEG) 
  1.05506x108 J 
· therm (US) 
  1.0548x108 J 
· thermie (15°C) 
th15 °C  4.1855x106 J 
· toe (tonne oil equivalent) 
toe  4.187x1010 J 
· ton TNT equivalent 
ton (TNT)  4.18x109 J 
· tonne coal equivalent 
tce  2.929x1010 J 
· tonne oil equivalent 
toe  4.187x1010 J 
· watt hour 
Wh  3600 J 
Energy density
Unit Name Symbol SI Equivalent 
· British thermal unit (IT) per cubic foot 
Btu (IT)/ft3  3.72589x104 J/m3 
· British thermal unit (IT) per gallon (UK) 
Btu (IT)/gal (UK)  2.3208x105 J/m3 
· British thermal unit (IT) per gallon (US) 
Btu (IT)/gal (US)  2.78716x105 J/m3 
· joule per cubic meter 
J/m3  1 J/m3 
· kilojoule per cubic meter 
kJ/m3  1000 J/m3 
· megagauss-oersted (MGOe) 
MGOe  7957.75 J/m3 
Energy flux
Unit Name Symbol SI Equivalent 
· British thermal unit (IT) per hour per square foot 
Btu (IT)/h-ft2  3.15459 W/m2 
· British thermal unit (therm.) per hour per square foot 
Btu (therm.)/h-ft2  3.15248 W/m2 
· langley (flux) 
ly  697.5 W/m2 
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List Units: A B C D E-F G H-I J-L M N O-P Q-R S T U-Z
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FREE Publications
Essentials of Manufacturing

Information, coverage of important developments and expert commentary in manufacturing.

STEM Career Outlook

Wages, employment opportunities, and growth projections for STEM jobs.

Injection Molding Design Guide

Guide for high quality and cost-effective plastic injection molding.

Selecting the Right 3D Printer

Discover how to choose the right 3D printer for your needs and the key performance attributes to consider.

more publications