We explain to you what energy is and what are the different types of energy that we can find and some examples of them.
What is energy?
The term energy comes from the Greek word for activity, en gege, and is used in various areas of knowledge such as physics, chemistry or the economy, to refer to a force capable of generating an action or a job . Thus, energy is understood as the forces capable of mobilizing, transforming, bringing up or keeping an object functioning.
The energy is measurable or measurable and also intervenes in any form of action or reaction . The displacement, the chemical reactions, the changes of state of matter or even the state of rest, have their explanation in an amount of energy of a specific type.
A fundamental principle of energy is that it cannot be created or destroyed, as stipulated in the Energy Conservation Principle, but can be transformed from one type of energy. To another, as is the case when we use electrical energy to illuminate a room (light energy).
Some of these transformations, however, convert sophisticated forms of energy into more ordinary forms (such as caloric). This process is known as energy degradation.
The energy can be stored for later use, either by accumulating substances endowed with potential energy, such as hydrocarbons or combustible substances, which can then be exposed to oxygen (combusti n) to release huge amounts of energy; or how the electrical energy is stored, in objects such as batteries, whose electrically charged molecules are arranged in usable energy fields.
Even living things store energy, for which they constitute fat (lipids), a substance that can then be "burned" or converted into sugars to continue obtaining chemical energy and thus maintain the life cycle, which requires of the consumption of different energies.
It can serve you: Geothermal Energy.
Types of energy
There are various forms of energy, of which we can highlight the following:
- Electric . It is electromagnetic energy produced as a result of a difference in electrical potential between two points, which is resolved in an electron exchange called electricity .
- Kinetics It is a form of mechanical energy, related to the movement of objects or particles in a specific physical system. It is what sets things in motion.
- Wind . Energy associated with the thrust of the wind.
- Solar The own of the heat and light radiation of the Sun, radiated through space to the planets of the Solar System.
- Atomic or nuclear The derivative of the atomic nuclei and the forces that hold the subatomic particles together: the strong and weak nuclear forces, respectively. This also refers to the electrical energy obtained by taking advantage of the heat released by the fusion reactions or controlled atomic fission.
- Potential That contained in a physical system or a specific object in a given situation and that can then be transformed into other forms of energy, such as movement, heat, etc. It is the "potential" energy.
- Chemistry The energy that allows atomic junctions and molecular reactions, therefore essential for life, since it keeps the metabolism of living beings going.
- Caloric or thermal . The one that has to do with the temperature and the degree of heat: an object with a high degree of caloric energy increases its temperature.
- Magnetic The energy of ferromagnetic relationships: those that allow the attraction between a magnet and some metals.
- Internal . This is the name of the sum of the energy of all the elements that constitute a particular physical system.
- Hydraulic The energy that is obtained from the use of the kinetic thrust of water, whether from rivers, tides or water falls.
- Luminaire The one linked to perceptible light and the objects that produce it.
- Sonora The sound itself and its propagation in waves.
Examples of energy
The presence of energy is easily proven in everyday examples, such as:
- Caloric energy : approaching the hands to a heater, we will feel the hot air in the skin.
- Electric power : An electric shock occurs when a lightning bolt hits the ground, transmitting visible radiation to the naked eye and leaving the ground singed.
- Kinetic energy : when we go in a moving car and suddenly the driver applies the brakes, we can feel the thrust of the kinetic energy that we brought in our body .
- Magnetic energy : just witness the way in which the magnets adhere to the door of our refrigerator.
- Solar energy : Plants convert solar energy into chemical energy through photosynthesis, a process in which they also require water and carbon dioxide (CO 2 ).