Types of energy
Solution
Energy can be categorized into two main types: potential energy and kinetic energy.
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Potential Energy: This is the energy that an object possesses due to its position in relation to other objects. There are several types of potential energy, including:
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Gravitational Potential Energy: Energy an object possesses because of its position in a gravitational field. For example, a book on a high shelf has more gravitational potential energy than a book on a lower shelf because it has further to fall.
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Elastic Potential Energy: Energy stored in elastic materials as a result of their stretching or compressing. For example, a stretched spring or a drawn bow.
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Chemical Potential Energy: Energy stored in the bonds of atoms and molecules. It is released or absorbed in chemical reactions.
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Kinetic Energy: This is the energy that an object possesses due to its motion. There are several types of kinetic energy, including:
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Mechanical Energy: The sum of kinetic and potential energy in an object that is used to do work. For example, when a person throws a ball, the ball has mechanical energy because of its motion (kinetic energy) and its position (potential energy).
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Thermal Energy: The total of all the kinetic energy due to the random motion of atoms and molecules in an object. For example, the heat from a fire.
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Electrical Energy: Energy caused by the movement of electrons. For example, the energy that powers your computer.
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Radiant Energy: Electromagnetic energy that travels in transverse waves. For example, the light from the sun.
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Sound Energy: The movement of energy through substances in longitudinal (compression/rarefaction) waves. For example, the sound of a drum.
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Nuclear Energy: Energy stored in the nucleus of an atom — the energy that holds the nucleus together. The term is commonly used in nuclear power plants.
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These are the basic types of energy. Each type can be converted into other types of energy. This is known as the law of conservation of energy.
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