megajoule
Million energy units
A megajoule is one million joules—a unit of energy used when ordinary joules would require unwieldy numbers.
The megajoule appears in discussions of large-scale energy: The explosion released several megajoules.
For context, a megajoule is roughly the kinetic energy of a one-ton vehicle traveling at 100 mph.
Unit measuring electrical consumption
- calorieUnit of thermal energy
- kilocalorieUnit of food energy
- foot-poundUnit of work
- energy contentStored power in matter
energy density · calorimetry · thermodynamics · enthalpy · unit conversion · SI unit · metric
Energy source material
- combustionExothermic reaction with oxygen
- heatTransferred thermal energy
- thermalPertaining to warmth
- kineticRelating to motion
potential · chemical energy · electricity · work · power output · energy transfer · energy storage · energy release
Output per unit burned
- food energyUsable power from nutrients
- bomb calorimeterDevice measuring heat from burning
- power plantFacility producing electrical energy
- industrial processStandardized production technique
kilowatt-hour
Unit measuring electrical consumption
- calorieUnit of thermal energy
- kilocalorieUnit of food energy
- foot-poundUnit of work
energy content · energy density · calorimetry · thermodynamics · enthalpy · unit conversion · SI unit · metric
fuel
Energy source material
- combustionExothermic reaction with oxygen
- heatTransferred thermal energy
- thermalPertaining to warmth
kinetic · potential · chemical energy · electricity · work · power output · energy transfer · energy storage · energy release · reaction
fuel efficiency
Output per unit burned
- food energyUsable power from nutrients
- bomb calorimeterDevice measuring heat from burning
- power plantFacility producing electrical energy
megajoulemicrojoule
One-millionth of a joule
millijoule · joule · kilojoule