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Energy transformation, also known as energy conversion, is the process of changing energy from one form to another. [1] In physics , energy is a quantity that provides the capacity to perform work or moving (e.g. lifting an object) or provides heat .
Gasoline gallon equivalent (GGE) or gasoline-equivalent gallon (GEG) is the amount of an alternative fuel it takes to equal the energy content of one liquid gallon of gasoline. GGE allows consumers to compare the energy content of competing fuels against a commonly known fuel, namely gasoline.
The word energy derives from the Ancient Greek: ἐνέργεια, romanized: energeia, lit. 'activity, operation', [4] which possibly appears for the first time in the work of Aristotle in the 4th century BC. In contrast to the modern definition, energeia was a qualitative philosophical concept, broad enough to include ideas such as happiness ...
Electricity generation by source and country in 2023 [1] Annual world electricity net generation [2]. This is a list of countries and dependencies by annual electricity production.
Per capita energy use by source The percentage of energy use by source. From its founding until the late 19th century, population and energy use in the United States both increased by about 3% per year, [10] [11] resulting in a relatively constant per capita energy use of 100 million BTU.
Renewable electricity generation by source and country in 2023 [1]. This is a list of countries and dependencies by electricity generation from renewable sources. [1]Renewables accounted for 30% of electric generation in 2023.
This is a list of countries by total primary energy consumption and production. 1 quadrillion BTU = 293 TW·h = 1.055 EJ 1 quadrillion BTU/yr = 1.055 EJ/yr = 293 TW·h/yr = 33.433 GW. The numbers below are for the total energy consumption or production in a whole year, so should be multiplied by 33.433 to get the average value in GW in that year.
Energy quality is a measure of the ease with which a form of energy can be converted to useful work or to another form of energy: i.e. its content of thermodynamic free energy. A high quality form of energy has a high content of thermodynamic free energy, and therefore a high proportion of it can be converted to work; whereas with low quality ...