What is Energy?

References: Energy - Wikipedia https://en.wikipedia.org/wiki/Energy Law of Conservation of Energy - Wikipedia https://en.wikipedia.org/wiki/Conservation_of_energy Isolated System - Wikipedia https://en.wikipedia.org/wiki/Isolated_system Time Translation Symmetry - Wikipedia https://en.wikipedia.org/wiki/Time_translation_symmetry Noether’s Theorem - Wikipedia https://en.wikipedia.org/wiki/Noether%27s_theorem Conservative Force - Khan Academy https://www.khanacademy.org/science/high-school-physics/work-and-energy-2/gravitational-potential-energy-and-conservative-forces/v/conservative-forces Electronvolt - Wikipedia https://en.wikipedia.org/wiki/Electronvolt Potential Energy - Wikipedia https://en.wikipedia.org/wiki/Potential_energy Kinetic Energy - Wikipedia https://en.wikipedia.org/wiki/Kinetic_energy Mechanical Energy - Wikipedia https://en.wikipedia.org/wiki/Mechanical_energy Chemical Energy - Wikipedia https://en.wikipedia.org/wiki/Chemical_energy Electrical Energy - Wikipedia https://en.wikipedia.org/wiki/Electrical_energy Thermal Energy - Wikipedia https://en.wikipedia.org/wiki/Thermal_energy Nuclear Energy - Wikipedia https://en.wikipedia.org/wiki/Nuclear_power Radiant Energy - Wikipedia https://en.wikipedia.org/wiki/Radiant_energy