joule
Measure of work
A joule is the standard unit of energy in the International System of Units, equal to the work done when a force of one newton moves an object one meter.
It measures energy in all forms—electrical, mechanical, thermal: A typical AA battery stores about 9,000 joules.
Named for the physicist James Prescott Joule. (Capitalized Joule refers to the physicist.)
Power to do work
- workEffort toward a goal
- heatTransferred thermal energy
- powerEnergy transfer rate
- wattUnit measuring power
newton · force · displacement · kinetic · potential · mechanical · electrical · thermal
Unit of thermal energy
- kilowatt-hourUnit measuring electrical consumption
- watt-hourMeasure of electrical consumption
- kilocalorieUnit of food energy
- megajouleSI energy unit, 10⁶ joules
gigajoule · kilojoule · foot-pound · therm · erg
Thermodynamic total heat quantity
- entropyQuantified chaos in systems
- temperatureMeasured heat intensity
- calorimetryMeasuring heat in reactions
- calorimeterInstrument measuring heat transfer
conduction · convection · radiation · expansion · compression · isothermal
Accuracy of measurement
- calibrationAdjusting for measurement accuracy
- quantificationExpressing something numerically
- instrumentationDesign of measuring devices
- accuracyDegree of correctness
standardization · metrology · reading · conversion · calculation
energy
Power to do work
watt · newton · force · displacement · kinetic · potential · mechanical · electrical · thermal · conservation
calorie
Unit of thermal energy
- kilowatt-hourUnit measuring electrical consumption
- watt-hourMeasure of electrical consumption
- kilocalorieUnit of food energy
megajoule · gigajoule · kilojoule · foot-pound · therm · erg
enthalpy
Thermodynamic total heat quantity
- entropyQuantified chaos in systems
- temperatureMeasured heat intensity
- calorimetryMeasuring heat in reactions
calorimeter · conduction · convection · radiation · expansion · compression · isothermal
precision
Accuracy of measurement
- calibrationAdjusting for measurement accuracy
- quantificationExpressing something numerically
- instrumentationDesign of measuring devices
accuracy · standardization · metrology · reading · conversion · calculation