Is physics based on the theory of molecular kinetics?

In fact, it is difficult to say what it is based on, if you talk about classical physics, I prefer to base it on Newton's laws, even if it is a microscopic molecular kinetic theory, the process of simplifying and analyzing its models is carried out in accordance with Newton's laws.

When it comes to modern physics, in order to pursue the original face of the world, the statements of scientists are also inconsistent, and the more reliable is string theory. That is, all matter in the universe is composed of something called a string, and the different vibration directions of the string constitute the diversity of matter, because the 11-dimensional space in which the string is located is highly distorted, so it is difficult to verify its correctness through experiments, so this theory is still in the design stage.

As I said upstairs, physics is constantly evolving, and if you continue to study physics in the future, you will find the trend of physics development, and in the future, Newton's concept of force is likely to be gradually replaced by the field theory of modern physics, and the knowledge system of physics will also change greatly. All in all, there is no end to learning.

This is the general unification of physical theories, right? There is a superstring theory that is very promising to be a theory that can accomplish this goal, and Einstein spent his life searching for a grand unification of physics, but he did not succeed, but now it seems to be relatively close.

Molecular kinetic theory should belong to the category of classical physics, which is a theory based on an ideal molecular model, which uses Newtonian mechanics combined with an ideal molecular model to explain microscopic phenomena.

For more details, you can see some content about superstring theory, and its premise may be the basis of physics you want to ask, and the development of physics is endless!

Physics should be based on Newtonian mechanics.

The content of molecular motion theory is that matter is composed of a large number of molecules and atoms, these molecules are in irregular thermal motion without stopping, there is an interaction force between molecules, and the motion of molecules obeys Newton's laws of motion. Molecular kinetic theory is a classical microstatistical theory that studies the properties and laws of thermal motion of matter.

1. Objects are made up of a large number of molecules.

1 Molecules: The particles that make up objects are collectively referred to as molecules.

2 The number of water molecules contained in 1 mol of water is as high as one.

2. Molecular thermal movement.

1 Diffusion. 1) Diffusion: The phenomenon in which different substances are able to enter each other.

2) Cause: Caused by the irregular movement of material molecules.

3) Occurrence environment: Diffusion phenomena can occur when substances are in solid, liquid and gaseous states.

4) Significance: It proves that the molecules of matter never stop moving in random motion.

5) Rule: The higher the temperature, the more obvious the diffusion phenomenon.

2 Brownian motion.

1) Concept: This irregular motion of suspended particles is called Brownian motion.

2) Cause: caused by the imbalance of a large number of liquid (gas) molecules on the impact of suspended particles.

3) Characteristics of Brownian motion: never stopping, no rules.

4) Influencing factors: the smaller the particles, the more obvious the Brownian motion, and the higher the temperature, the more intense the Brownian motion.

5) Significance: Brownian motion indirectly reflects the irregularity of the molecular motion of liquids (gases).

3 Thermal exercise.

1) Definition: The irregular movement of molecules that never stops.

2) Macroscopic Performance: Diffusion Phenomenon and Brownian Motion.

3) Features. It never stops;

Movement is irregular;

The higher the temperature, the more intense the thermal movement of the molecules.

3. Intermolecular forces.

1 There are gaps between molecules.

1) Voids of gas molecules: Gases are easily compressed, indicating that there are large voids between gas molecules.

2) Gaps between liquid molecules: The total volume of water and alcohol decreases after mixing, indicating that there are gaps between liquid molecules.

3) Voids between solid molecules: The molecules of gold and lead pressed together can diffuse into each other's interior, indicating that there are also gaps between solid molecules.

2 Intermolecular forces.

1) When the object is stretched hard, the force between the parts of the object should be generated to resist the stretch, and the force between the molecules is shown as gravity.

2) When the object is compressed by force, the force between the parts of the object will resist the compression, and the intermolecular force will be repulsive.

Note: The intermolecular force refers to the resultant force of the gravitational and repulsive forces of the interaction between molecules.

4. Molecular kinetic theory.

1 Contents: An object is made up of a large number of molecules, the molecules are in a never-ending irregular motion, and there is an interaction force between the molecules.

2 Since the thermal motion of the molecule is irregular, it is contingent for any one molecule, but it shows regularity for the whole of a large number of molecules.

1) Gases are composed of molecules, which are very small particles, and the distance between them is much larger than the diameter of the quantum (10-10m), and the volume of the molecules can be slightly ignored compared with the volume of the gas.

2. Gas molecules are in eternal irregular motion in all directions at different speeds. Typical examples are diffusion phenomena and Brownian motion (both indirect). The surface of Brownian motion shows the irregular motion of macroscopic particles, which actually reflects the irregular motion of microscopic molecules.

3) Except when they collide with each other, the interaction between gas molecules is very weak or even negligible.

4) Gas molecules colliding with each other or against the wall of the device are elastic collisions.

5) The average kinetic energy of a molecule is directly proportional to the thermodynamic temperature.

6. There is an interaction force between molecules at the same time. There is both gravitational and repulsive force between molecules, and both gravitational and repulsive forces decrease with the increase of the distance between molecules (the larger the molecular spacing, the smaller the gravitational and repulsive forces; The smaller the molecular spacing, the greater the gravitational and repulsive forces). But the repulsion force changes faster than the gravitational force, and what is actually manifested is the resultant force of the gravitational force and the repulsive force.

The table force is shown as a repulsive force at 0 r, and at r ....o is the point at which gravity is equal to repulsion.

Molecular kinetic theory is a theory that explains the microstructure and properties of matter.

It is based on the fact that molecules and atoms are the basic building blocks of matter, and explains the macroscopic properties of matter by studying the motion and interaction of molecules and atoms.

The theory of molecular motion holds that the substance is composed of a large number of molecules and atoms, which are in irregular thermal motion without stopping, and there is an interaction force between molecules, and the motion of molecules obeys Newton's laws of motion. It establishes the relationship between macroscopic quantities and the corresponding microscopic average values through the method of statistical averaging of a large number of molecules, which is used to quantitatively explain the equation of state, thermodynamic properties, and microscopic properties of objects, such as diffusion, heat conduction, viscosity, etc. Molecular kinetic theory is mainly applied to gases and is also known as gas kinetic theory.

According to the theory of molecular kinetics, matter is made up of a large number of tiny molecules or atoms that move at high velocity and constantly collide. These collisions lead to interactions between molecules or atoms, which determine the macroscopic properties of matter, such as temperature, pressure, volume, and thermodynamic properties.

Molecular kinetics theory also explains the state changes of matter at different temperatures. When the temperature increases, the average kinetic energy of molecules or atoms increases, their motion becomes more violent, the interaction weakens, and the substance takes on a liquid and gaseous state. At lower temperatures, the movement of molecules or atoms slows down, the interaction is enhanced, and the matter appears to be solid.

Molecular kinetic theory has a wide range of applications in fields such as physics, chemistry, and materials science, helping people understand and explain the properties and behavior of matter.

The molecular kinetic theory is as follows:

1. Matter is composed of a large number of molecules.

The "massiveness" of the number of molecules that make up a substance corresponds to the "small" number of molecules.

2. Molecules are moving irregularly without stopping.

Through the diffusion phenomenon and Brownian motion is the macroscopic embodiment of the irregular motion of molecules, the more intense the molecular motion, the higher the temperature of the object, so it is called "thermal motion friendly oak".

3. There is gravitational and repulsive force that interacts between molecules.

Repulsion and gravity exist at the same time, and both decrease with the increase of the intermolecular distance r, but the repulsion force is more sensitive to r value than gravity. Therefore, when r is less than a certain value r0 (i.e., the equilibrium position), the resultant force between the molecules behaves as repulsion; When r is greater than r0, the resultant force between molecules.

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Through the method of statistically averaging a large number of molecules, the molecular kinetic theory establishes a good relationship between the average value of macroscopic quantities and the corresponding microscopic quantities, which is used to quantitatively explain the equation of state, thermodynamic properties, diffusion, heat conduction, viscosity, etc. of objects. Molecular kinetic theory is mainly applied to gases and is also known as gas kinetic theory.

The principle is to establish the relationship between macroscopic quantities and the corresponding microscopic average values through the method of statistically averaging a large number of molecules, so as to quantitatively explain the equation of state, thermodynamic properties, diffusion, heat conduction, viscosity, etc. of objects.

The above content refers to: Encyclopedia - Molecular Kinetic Theory.