Does hot stuff get cold in a vacuum? What does heat transfer depend on?

It mainly relies on infrared rays to radiate energy outward, which is determined by entropy (the energy must transition to a low-energy state) and the sun will produce solar wind outward, which is also the way of energy transfer.

The rest of the stuff is mostly radiation.

Yes!!! Thermal radiation, which is energy that travels in the form of electromagnetic waves.

Yes, the heat of the sun can be transmitted to the earth.

The essence of heat is the movement of microscopic matter.

Thermal energy refers to the energy possessed by the thermal motion of a microscopic substance.

The essence of temperature is the speed at which microscopic matter moves. The faster the microscopic matter moves, the higher the temperature.

Thermal motionThermal motion refers to the movement of microscopic substances. The forms of thermal motion are divided into flow, vibration, and spin.

1.The form of thermal motion of the molecule is vibration.

Thermal motion of gas molecules. At room temperature and pressure, the average velocity of air molecules is 500 meters per second, and in 1 second, each gas molecule collides with each other 50 billion times. For example:

Once the jasmine blooms, the whole family and even the neighbors can smell the fragrant aroma. Rotting fish and meat will make the surrounding area stench.

Thermal motion of liquid molecules. For example, if you put 1 drop of ink in a glass of water, the ink will slowly spread out and mix completely with the water.

This indicates that the molecules of one liquid are moving into another liquid, or that the molecules of the liquid are constantly moving. Using one cup of hot water and one cup of cold water, drop 1 drop of red ink into each cup and find that the red ink in the hot water cup spreads faster than the cold water cup. This illustrates:

The higher the temperature, the greater the speed of movement of the molecules.

In 1827, Brown in England put Garcinia cambogia powder into water, and then took out 1 drop of suspension and observed it under a microscope and found that the small particles of Garcinia cambogia kept moving in the water, and the direction and speed of each particle changed very quickly, as if they were dancing a chaotic dance.

Thermal motion of solid molecules. For example, if you press a lead plate with a very smooth and clean surface on a gold plate, you can find that after a few months, the lead molecules have escaped into the gold plate, and the gold molecules have also escaped into the lead plate, and in some places even into a depth of 1 millimeter.

If left for 5 years, the gold and lead plates will be joined together, and their molecules will enter each other by about 1 centimeter.

2.The form of thermal motion of atoms is spin. The faster the spin speed of an atom, the larger its vortex radius and the larger its volume.

3.The thermal motion of electrons takes the form of rotation of the nucleus. The spin of the nucleus and the rotation of the nucleus of the electron are mutually causal.

The spinning electrons of the Rao nucleus collide with photons to produce light. The faster the electron nucleus rotates, the higher the frequency of the photon.

4.Plasma thermal movement. When the temperature of the atom reaches a certain point, the electrons separate from the nucleus and become plasma.

For example, the solar wind flows at a speed of 200 800 km/s.

Heat is the irregular motion of molecules, which is essentially a form of energy.

Heat can be transferred through a vacuum.

In addition, in physics, the heat possessed by an object is called internal energy, and one of the ways to change the internal energy is heat transfer, and the heat transferred during the heat transfer process is called heat.

I'm sure you'll have something to say after reading this article, and I should be able to solve your problem.

The so-called "hot" refers to two meanings:

One is thermal motion, which is the constant movement of particles of matter;

The second is heat, which is real energy, and thermal movement illustrates the existence of internal energy.

Heat transfer, on the other hand, refers to the transfer of heat, and energy can be transferred either through the collision of thermally moving particles or through the vacuum of thermal radiation to another place. For example: space is vacuum, and solar heat can reach the Earth.

Vacuum cannot conduct heat, but thermal radiation can propagate heat, which is the irregular movement of material molecules, which we can understand as a billiard model The faster the molecules move, the hotter the object will be.

If there is no matter in the vacuum, there is no molecular movement, so it cannot propagate heat Thermal radiation is an electromagnetic wave, and light is also an electromagnetic wave, and it travels the fastest in a vacuum, and there will be deceleration in other media, but this is not heat, this is energy.

The meaning of vacuum refers to the state of gas with a pressure below one atmosphere in a given space and is a physical phenomenon. In the "void", sound cannot be transmitted because there is no medium, but the transmission of electromagnetic waves is not affected by the vacuum.

In vacuum technology, vacuum is for the atmosphere, and when part of the matter in a specific space is expelled so that its pressure is less than one standard atmosphere, then we call this space a vacuum or vacuum state.

Yes, but in a radiant way.

There are three modes of heat transfer:

Conduction, convection, radiation.

Conduction and convection cannot propagate in a vacuum, whereas radiation can.

It is through radiation that the sun's heat reaches the earth.

Heat conduction is heat transfer, and there are three ways of heat transfer: conduction, convection, and heat radiation. Conduction and convection rely on the medium to transfer internal energy, and thermal radiation does not need the medium to transfer internal energy, so vacuum energy conducts heat through thermal radiation. It's just that there is less conduction and convection, and the thermal conductivity effect is relatively poor.

No. Heat conduction requires the specific heat of an object to achieve heat transfer. Strictly speaking, there are gases such as hydrogen and helium outside the atmosphere, but generally speaking, they can be regarded as vacuum.

Don't mislead people, you can check the Internet whether the vacuum can conduct heat. Convection is the principle of friction, and thermal radiation is photothermal conversion, not heat conduction.

There are three ways in which heat is transferred, conduction, convection, and radiation. Radiation is actually electromagnetic waves that can travel in a vacuum.

Air energy is vacuum heat conduction.

First of all, it should be understood what temperature is.

Temperature is not just a measure of heat and cold, the definition of temperature in thermal science is a physical quantity that measures whether a system is in thermal equilibrium with other systems (the zero law of thermodynamics) Then, we know that an absolute vacuum as a system is in thermal contact with any other object, and other objects must release heat (emit thermal radiation) to this vacuum, that is, an absolute vacuum is not in thermal equilibrium with any system. Or, in layman's terms, absolute vacuum is not any pre-existing temperature. You can say that it is no temperature.

Or by the third law of thermodynamics, absolute zero is impossible. Presumably, an absolute vacuum should be able to be defined as absolute zero. Note that the wording I have bent is simply defined to mean that since there is no entity in the absolute vacuum that absorbs thermal radiation, it is impossible for this system to change its temperature to heat equilibrium with other systems, and the thermal radiation passes through this system.

But in fact, there is such a contradiction as staring at the above inference.

1. Whether the absolute vacuum has nothing can be regarded as a system?

2. Whether an absolute vacuum really exists. These two contradictions lead us to understand temperature at a microscopic level. Microscopic temperature refers to the degree of intensity of the irregular thermal movement of molecules in a system.

Then, there are no particles in an absolute vacuum, and naturally it does not matter how violent the thermal motion of the particles is, so its temperature cannot take any existing effective value, and it can also be said that there is no temperature. Or to put it another way, no particle can be defined as a state where any particle is at rest, i.e., absolute zero. I believe we have all seen the meaningless side of this question, because the conclusions always tell us that, like the direction of the zero vector, the temperature of the absolute vacuum always shows the aspect of "nothing" and needs to be defined, but why is there no such definition in the world?

This is because a vacuum in the absolute sense cannot exist, because all kinds of fields are everywhere, and where we thought there were no particles, there were always particles constantly being created and disappearing because of the small fluctuations in the field energy. That is, there is always matter in existence and motion anywhere, which is also compatible with the third law of thermodynamics (in fact, it is a simple corollary) There is a mention of microwave background radiation, but it is clear that space is by no means a vacuum and is not discussed here.