what do you mean by energy??
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Energy is the capacity of a physical system to do work. The common symbol for energy is the uppercase letter E. ... A stationary object in a gravitational field, or a stationary charged particle in an electric field, has potential energy. Kinetic energy is observable as motion of an object, particle, or set of particles.
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The ability to be very active or do a lot of work without getting tired or the power that comes from coal, electricity, gas, etc. that is used for producing heat, driving machines, etc
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