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27 de feb. de 2024 · Energy is the capacity for doing work and can exist in various forms, such as potential, kinetic, thermal, electrical, chemical, or nuclear. Learn about the conservation of energy, the units of measurement, and the sources and conversions of energy from Britannica.
In physics, energy (from Ancient Greek ἐνέργεια (enérgeia) 'activity') is the quantitative property that is transferred to a body or to a physical system, recognizable in the performance of work and in the form of heat and light.
Learn the definition and conservation of energy in physics, with examples and applications. Watch a video lesson and interact with the material on Khan Academy's website.
Explore data and charts on energy consumption, production, sources, and impacts around the world. Learn about the challenges and solutions for energy access, decarbonization, and safety.
The IEA is a global leader in energy security, access, climate change and net zero emissions. Explore its data, reports, events, policies and more on its 50th anniversary.
noun. us / ˈen.ɚ.dʒi / uk / ˈen.ə.dʒi / energy noun (STRENGTH) Add to word list. B1 [ U ] the power and ability to be physically and mentally active: Since I started eating more healthily I have so much more energy. have the energy I was going to go out this evening, but I just haven't got the energy.
Energy is a peer-reviewed journal that covers various aspects of energy analysis, modelling, planning and management. It publishes original research, reviews and special issues on topics such as renewable energy, thermal systems, carbon emissions and more.