Define energy?

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The strength and vitality required for sustained physical or mental activity.
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Maths, programming language

Capacity to perform work
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The ability to do wotk is called energy
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Tutor

capacity to do work
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Want your child to love MATHS ?

you have written answer bcoz u r having energy i.e capacity to do work
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Capacity of doing work and its unit is jule
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Energy is the ability to do work. There are different types of energies such as light, kinetic, potential, chemical energy etc.
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Engineer

Energy is the Capacity to do Work... Its unit is Joule (J). Two kinds of Energy... a.) Kinetic energy - Energy of the moving object Eg.. moving car, throwing a ball. K.E. = (mv^2)/2 Joule where m -> mass of the moving object ; v -> velocity in which the object moving b.)...
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Energy is the Capacity to do Work... Its unit is Joule (J). Two kinds of Energy... a.) Kinetic energy - Energy of the moving object Eg.. moving car, throwing a ball. K.E. = (mv^2)/2 Joule where m -> mass of the moving object ; v -> velocity in which the object moving b.) Potential Energy - Energy of the object which regain its own position... Eg... Relaxing a stretched rubber band, stretched bow, stretched spring etc., P.E. = mgh Joule where, g -> Acceleration due to gravity ; h -> Height or Displacement. Note: if an object moved because of acceleration due to gravity, its purely of Potential energy and not kinetic energy. read less
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Educationist.

The ability to do work is called energy. Work done per unit time can also be defined as energy.
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Tutor

Energy is a property of objects which can be transferred to other objects or converted into different forms. The "ability of a system to perform work" is a common description, but it is misleading because energy is not necessarily available to do work. For instance, in SI units, energy is measured in...
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Energy is a property of objects which can be transferred to other objects or converted into different forms.[1] The "ability of a system to perform work" is a common description, but it is misleading because energy is not necessarily available to do work.[2] For instance, in SI units, energy is measured in joules, and one joule is defined "mechanically", being the energy transferred to an object by the mechanical work of moving it a distance of 1 metre against a force of 1 newton.[note 1] However, there are many other definitions of energy, depending on the context, such as thermal energy, radiant energy, electromagnetic, nuclear, etc., where definitions are derived that are the most convenient. read less
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