Energy is a word we hear often but what is it? Well in technical terms, energy is the ability for a physical system to produce changes in another physical system. There are a many types of energy as there are a variety of ways to produce changes. They include thermal, gravitational potential, chemical, elastic, and sound energy.
Thermal energy are changes in the temperature. Gravitational potential energy is energy stored in an object when it is above the surface of the Earth, which means that the object has the potential to do work or in this case fall down. Chemical energy is a form of potential energy and is stored in food, fuels, etc and could be released in different forms by breaking it down. Elastic potential energy is when force is applied to elastics since they will spring or bounce back and has the potential to return the energy. Sound energy is simply the energy used to produce sound or vibrations through whatever medium.
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