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Energy Forms and Transformations

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zavad
15 diapositives · 397 Views · Jul 10, 2014

Energy is the capacity to produce changes in a system and exists in various forms, including mechanical, thermal, chemical, nuclear, electrical, sound, and light energy. Energy can transform from one form to another through processes such as electric circuits converting electrical energy into heat or light, and chemical reactions transforming chemical energy. Understanding these transformations helps in harnessing energy efficiently for work. The concept of energy emphasizes that while it exists in different states, it is not categorized into distinct types, but rather, it represents the ability to do work.

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Energy Forms and Transformations
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  1. Energy Forms and Transformations The term energy describes the capacity to produce changes within a system. There aren’t different “types” of energy. Energy is transformed and can reside in different states.

  2. Energy Forms and Transformations Energy has many different forms, and many devices transform energy between these various forms: • Electric circuits transform electrical energy into heat, light, sound, and mechanical energy. • The sun transforms nuclear energy into light and radiant energy. • Chemical reactions transform chemical energy into other forms of energy.

  3. Mechanical Energy The sum of an object’s kinetic (or motion) energy, its gravitational potential energy, and its elastic potential energy.

  4. Mechanical Energy Kinetic Energy • The energy of movement • Movement is a broad term

  5. Mechanical Energy Potential Energy -The energy of position -The ability to do work -Between an object and a given position -Gravitational, elastic, chemical

  6. Heat Energy Kinetic energy associated with the random motions of particles that make up an object. -More correctly called thermal energy.

  7. Chemical Energy Potential energy associated with the arrangement of charged particles in atoms and molecules. This energy can be transformed during chemical changes when bonds between atoms are broken, made, or rearranged.

  8. Nuclear Energy • Energy possessed by the nucleus of atoms as a result of the strong force that holds the nucleus together. • This energy can be converted into kinetic energy in the processes such as fission and fusion.

  9. Electrical Energy A form of potential energy that charged particles may have due to the electrical forces exerted on them.

  10. Sound Energy The kinetic energy of moving molecules that carry sound waves.

  11. Light Energy Energy carried by visible light. • Electromagnetic radiation

  12. Radiant Energy • Energy carried by waves similar to light but invisible, such as microwaves, radio waves, infrared rays, and ultraviolet rays.

  13. Alternative Definition Energy is the ability to do work.

  14. Energy Transformations Energy doesn’t change “forms.” It merely exists in different states. What state (form) is the energy currently in?

  15. Energy Chain/Web