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the capacity to do work

mechanical energy

the amount of work an object can do because of the object's kinetic and potential energies

electro-magnetic energy

Forms of energy that travels through space in the form of waves.
e.g. visible light (sun) x-rays radio waves

law of conservation of energy

the law that states that energy cannot be created or destroyed but can be changed from one form to another

heat energy

energy released in the form of heat caused by the motion of moving molecules and the breaking of chemical bonds

nuclear energy

energy from nuclear fusion(the combination of the nuclei of small atoms to form a larger nucleus;releases energy or nuclear fission(the splitting of the nucleus of a large atom into two or more fragments;releases additional neutrons and energy)

energy conversion

a change from one form of energy to another

kinetic energy

the energy an object has due to its motion

heat engine

a machine that transforms heat into mechanical energy, or work

potential energy

the energy that an object has because of the position, shape, or condition of the object


the unit used to express energy;equivalent to the amount of work done by a force of 1 N acting through a distance of 1 m in the direction of the force (symbol, J)

chemical energy

Energy stored in the chemical bonds of molecules; a form of potential energy.

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