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Do you know basic concepts of Physics?
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Do you know basic concepts of Physics?
It is natural and correct to be interested in the surrounding world, its activity and development laws. That is why it is appropriate to pay attention to natural sciences, for example, physics, which explains the nature of the formation and development of the Universe. Basic physical laws are easy to understand. At a very young age, school introduces children to these principles. For many, this subject begins with the textbook "Physics (Grade 7)". Schoolchildren are exposed to the basic concepts of and and thermodynamics, they get acquainted with the core of the basic physical laws. But should knowledge be limited to a school course? What physical laws should everyone know? This will be discussed later in the article. SCIENTIFIC PHYSICS Many nuances of the described science are familiar to everyone from early childhood. This is essentially due to the fact that physics is one of the branches of natural science. He talks about the laws of nature, whose action affects the life of every person and provides it in many ways, about the properties, structure and laws of motion of matter. The term "physics" was first mentioned by Aristotle in the 4th century BC. Initially, it was synonymous with the concept of "philosophy". After all, both sciences had a common goal - to correctly explain all the mechanisms of the universe. But in the 16th century, as a result of the scientific revolution, physics became independent. COMMON LAW Some of the basic laws of physics are used in various fields of science. In addition to them, there are those that are considered common to all nature. About it This means that the energy of every closed system is conserved when something happens in it. Nevertheless, it is able to transform into another form and effectively change its quantitative composition in different parts of the named system. At the same time, the energy in an open system decreases with the condition of increasing the energy of any bodies and fields interacting with it. In addition to the above general principle, physics has basic concepts, formulas, and laws necessary to explain the processes occurring in the surrounding world. Learning them can be extremely interesting. Therefore, this article briefly reviews the basic laws of physics, and it is important to pay full attention to them for a deeper understanding. MECHANICS Young scientists discover many basic laws of physics in the 7th-9th grade of school, where such a field of science as mechanics is studied more fully. Its main principles are described below. Galileo's law of relativity (also called the mechanical law of relativity or the basis of classical mechanics). The essence of the principle is that under the same conditions, the mechanical processes in any inertial reference system are completely the same. Hooke's law. Its essence is that the greater the impact on an elastic body (spring, rod, cantilever, beam) from the side, the greater its deformation. Newton's laws (represent the basis of classical mechanics): The principle of inertia shows that any body can be at rest or move in a uniform and straight line, if other bodies do not affect it in any way or if they compensate each other's motion in some way. To change the speed of movement, some force must be applied to the body, and of course the result of the same force acting on bodies of different sizes will also be different. The basic law of dynamics states that the greater the resultant of the forces acting on a given body at the moment, the faster it accelerates. And accordingly, the more the body weight, the less this indicator is. Newton's third law states that any two bodies always interact with each other according to the same scheme: their forces are of the same nature, equivalent in magnitude, and connecting these bodies has the opposite direction along a straight line. The principle of relativity confirms that all events that occur under the same conditions in inertial frames of reference are exactly the same. THERMODYNAMICS The school textbook ("Physics. Grade 7"), which reveals the basic laws to students, introduces them to the basics of thermodynamics. Below we briefly discuss its principles. The laws of thermodynamics, which are fundamental in this field of science, have a general nature and are not related to the details of the structure of a particular substance at the atomic level. By the way, these principles are important not only for physics, but also for chemistry, biology, aerospace engineering, etc. For example, there is a rule in the named industry, which does not correspond to a logical definition, in a closed system with unchanged external conditions, a state of equilibrium is established over time. And the processes taking place in it always cover each other. Another rule of thermodynamics is that there are many numbers characterized by chaotic motion Download 113.12 Kb. Do'stlaringiz bilan baham: |
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