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- DictionaryEn·er·gy/ˈenərjē/
noun
- 1. the strength and vitality required for sustained physical or mental activity: "changes in the levels of vitamins can affect energy and well-being"
- 2. power derived from the utilization of physical or chemical resources, especially to provide light and heat or to work machines: "nuclear energy"
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 can change from one form to another, but isn’t created or destroyed.
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In physics, energy is the power or heat that is created when something moves, is burned, or is exerted. It is typically represented in two forms: potential and kinetic energy. Potential energy is power that is stored in something as it sits still or is unburned.
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. People use energy for a variety of things, such as to walk and bicycle, to move cars along roads and boats through water, to cook food on stoves, to make ice in ...
energy noun (POWER) [ U ] physics. power to do work that produces light, heat, or motion, or the fuel or electricity used for power: Certain materials acquired the ability to carry an electric charge with no loss of energy. The cost of energy rose last month.
Energy is a quantitative property of a system that depends on the motion and interactions of matter and radiation within that system.
About. Transcript. Energy is defined as the ability to do work. Energy can be found in many things and can take different forms. For example, kinetic energy is the energy of motion, and potential energy is energy due to an object's position or structure. Energy is never lost, but it can be converted from one form to another. Questions.
Definition. Power is the instantaneous rate of energy use or flow. Water Analogy. Power is like the rate at which water pours out of the bucket. Typical Power Units. Watt. Joule/second (J/s) Btu/hr. Energy = Power x Time.
