What is physical?
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What Does physical Mean
Physics is a term that comes from the Greek phisis and which means "reality" or "nature" . It is the science that studies the properties of nature with the support of mathematics . Physics is responsible for analyzing the characteristics of energy , time and matter , as well as the links that are established between them.
For example: "Tomorrow I have to take a physics exam" , "The vase fell due to the laws of physics" , "A physics expert warned that a movement at that speed creates a risk for the athlete" .
This science does not only develop theories: it is also a discipline of experimentation . Their findings, therefore, can be verified through experiments. In addition, its theories allow to establish forecasts on tests that are developed in the future.
Thanks to its vast scope and long history, physics is classified as a fundamental science . This scientific discipline can be dedicated to describing the smallest particles or explaining how a star is born, for example. Galileo Galilei , Isaac Newton, and Albert Einstein have been some of the most recognized physicists in history . The original development of physics, however, was left to the Greek philosophers.
In this sense, it should be noted, for example, the figure of Empedocles who was a Greek philosopher and physicist who carried out the demonstration of the existence of air. And he did it by means of a device that received the name of hourglass, which was a copper sphere that filled with water when immersed in said liquid and which was characterized by having holes in the bottom and an open neck.
Thus, with it he demonstrated that when the aforementioned sphere was taken out of the water without covering the neck, the liquid came out through all the aforementioned holes. However, when the same operation was carried out but the neck was covered, the water did not come out because the air was in charge of obstructing the passage of the liquid.
In the same way, one can also speak of another ancient physicist such as Democritus. This is considered as the father of the atomistic school and what he did was to expose that the aforementioned atoms cannot be divided at any time.
Relativity (which takes into account the field of space-time and the interrelationships of gravity), electromagentism (studies light and other electromagnetic issues), classical mechanics (focuses on the displacement of bodies) and quantum mechanics (specialized in the atomic universe) are part of the main theories of physics.
In addition to all the aforementioned, it must be emphasized that we also use the term physics to form, together with other words, terms that are widely used in our current society. Thus, for example, we speak of Physical Education to refer to the educational subject that revolves around exercises and knowledge to achieve good body development.
Nor should we forget the expression Physical Geography, which is that part of the aforementioned geography that basically focuses on what is the configuration of the seas and the land.