How is mechanical energy converted into internal energy, and what are the examples of internal energ

How can I tell you, you can basically understand it by studying the chapter of heat in high school 2.

The internal energy of the object includes the kinetic energy of the molecule and the potential energy of the molecule, you compress the gas, so that the potential energy of the molecule increases) (the molecule has the effect of gravitational force and repulsion, the distance between the molecules is 1 degree, the molecular potential energy increases by a degree and is reflected as the repulsion force, this degree is reflected as the gravitational force, and when compressed, the molecular spacing becomes smaller and reflected as the repulsion force, and this force does secondary work, then the molecular potential energy increases, and the internal energy reflects each other. The increase in potential energy is estimated by doing work, and it will be clear when there is nothing to do) Molecular potential energy can be converted into molecular kinetic energy (the greater the molecular velocity, the greater the molecular kinetic energy), and the increase of molecular kinetic energy is macroscopically reflected as the increase in temperature, the increase in temperature, and when the ignition point is reached, then the combustible material will be burned.

You don't have to worry, when the time comes, you will understand it naturally.

Hello, this is a microscopic change process. The first change is the molecular potential energy due to the forced narrowing of the gap between the molecules, which is manifested in the increase of the intermolecular repulsion force, and because the volume is reduced, the probability of the gas colliding with each other in a smaller space is large, and the collision of the gas makes the gas heat up, so the irregular movement of the gas is more intense. The vigorous movement increases the chance of molecules colliding with each other, which in turn further heats up the gas.

Hope it helps. Thank you!

There is a repulsive force between the molecules (you can imagine a spring between the molecules), and compressing the air reduces the distance between the molecules, just like compressing a spring. The spring is compressed to produce potential energy, customer service, intermolecular repulsion work, the result of molecular potential energy is an increase in internal energy, an increase in internal energy, an increase in temperature, and the acceleration of molecular motion (temperature is a representation of the size of molecular kinetic energy, only related to molecular kinetic energy, for the same substance, it is only related to speed), this is really too early for you, I have talked about it is already very shallow, I don't know if you understand, junior high school words to explain this problem, the knowledge gap is too big, your teacher is not not, but can not talk to you systematically, as a teacher, simply do not talk about it, for fear that you will understand the wrong trouble.

Mechanical energy refers to kinetic energy and potential energy, they can be converted into internal energy in various ways, for example: a thing slides from a smooth inclined plane to a rough horizontal plane, according to experience, its speed will become smaller and smaller, and when it stops (there is no mechanical energy), you feel the surface of the object with your hands and you will find that the object is a little hot, this is because the heat is generated when rubbing, that is, it is converted into internal energy. There are many such examples, which basically convert mechanical energy into internal energy by frictional heat generation.

Friction generates heat, and there is absolutely friction when the machine is working, and friction is to convert mechanical energy into internal energy.

Friction is the conversion of mechanical energy into internal energy.

An electronic salute in which internal energy is converted into mechanical energy.

The engine of the car, the launch process of the rocket, etc.

Any object is made up of electrons, protons, and neutrons. where electrons have a unit negative charge, and protons and neutrons are made up of charged quarks.

composition. When an object moves, every electron, proton, and neutron in its structure moves with it, causing the charged electrons and quarks inside the object to produce magnetic and induced electric fields. During the motion of an object, the energy associated with the velocity of motion is the kinetic energy of that object, while the energy associated with the internal magnetic field and the induced electric field is the internal energy of that object.

Physical effects

The physical manifestation of internal energy is by electrodynamics.

The law increases the magnetic field and induced electric field of all charged particles in the moving object, but its physical effect is to make the law of motion of the moving object satisfy the special theory of relativity.

The law of movement.

Within the scope of classical physics, the physical effects of the internal energy of moving bodies are negligible, hence Newtonian mechanics.

Establish. However, under the physical conditions of high energy and high speed, the internal energy of moving objects cannot be ignored, so special relativistic mechanics can obtain more accurate results.

1. Meteors rub against air to generate heat and luminescence: When meteors slide down in the sky, they emit heat and heat because mechanical energy is converted into internal energy.

2. Repeatedly bend the wire, and the temperature at the bend of the wire increases: repeatedly fold the wire, and do work on it to increase the temperature, which belongs to the conversion of mechanical energy into internal energy.

The electric potential energy possessed by a charged object is not a mechanical energy, and work can also be done on an object using the kinetic energy theorem. If the electric field force does positive work on a charged object, the electric potential energy decreases and the mechanical energy increases; On the contrary, the electric field force does negative work on the charged object, and the electric potential energy increases and the mechanical energy decreases.

Internal energy is transformed intoMechanical energyIt means that the object is externalDo the work, the internal energy decreases, and when the internal energy decreases, it is converted into mechanical energy. When work is done on an object, the internal energy of the object increases, that is, the mechanical energy is converted into internal energy.

The process of energy conversion is the process of doing work, when mechanical energy is converted into internal energy, the machinery overcomes resistance to do work, and 100% of the mechanical energy can be converted into internal energy.

Can form:

1) It can exist in nature in many forms, and each form can correspond to a form of movement.

Various forms of energy can be transformed into each other.

2) The law of conservation of energy.

Energy can neither be created nor disappear, it is simply transformed from one form of energy into another, or from one object to another.

In the process of turning the game to light or transfer, its total amount remains the same. This is the law of energy conversion and conservation, the first law of thermodynamics of the Chaela people.

Mechanical energy is converted into internal energy: the bicycle pump will be hot, friction heat is a typical mechanical energy into internal energy, originally the meteorite fell at a high speed at a high place, but because of atmospheric resistance, it burned.

In winter, the hands will be warm, that is, the mechanical energy will be converted into internal energy.

Drilling wood for fire is also the conversion of mechanical energy into internal energy.

Fold the wire a few times by hand, the wire will become hot and the mechanical energy will be converted into internal energy.

The most typical: the working principle of the generator is to convert mechanical energy into electrical energy.

There are two ways to change the number of energy in an object, one is to do work, and the other is heat transfer.

The process of doing work is the process of conversion of other forms of energy into internal energy, while heat transfer is the process of transferring internal energy from one object to another.

Mechanical energy must be converted into internal energy by doing work. For example, friction to generate heat, drilling wood for fire, etc., all do work through external forces to convert mechanical energy into internal energy.