About 34,700,000 results
Open links in new tab
  1. Energy - Wikipedia

    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 …

  2. Energy | Definition, Types, Examples, & Facts | Britannica

    Energy, in physics, the capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or various other forms. There are, moreover, heat and work—i.e., energy in …

  3. What is energy? explained - U.S. Energy Information ...

    Scientists define energy as the ability to do work. Modern civilization is possible because people have learned how to change energy from one form to another and then use it to do work.

  4. What Is Energy? Energy Definition and Examples (Science)

    Nov 27, 2017 · In science, energy is the ability to do work or heat objects. It is a scalar physical quantity, which means it has magnitude, but no direction. Energy is conserved, which means it …

  5. The Physics of Energy: What It Is and Why It Matters

    May 27, 2025 · Energy is the thread weaving together the cosmos, the spark igniting life, and the currency of every physical interaction. Understanding energy means understanding how the …

  6. What is energy: definition, types, and key examples

    At its core, energy is the ability to produce change or perform work. In a more technical sense, energy can be defined as the quantitative property that must be transferred to an object to …

  7. What Is Energy? Energy Explained

    Energy refers to the ability or capacity to do work or cause changes in a physical system. Most people think of energy as the “fuel” or “power” that allows things to happen or work to be done. …