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There are three ways in which heat is transferred: conduction, convection, and radiation. Heat conduction occurs between two objects that are in contact with each other (e.g., when boiling water, heat is transferred from the stove to the kettle and water) or between different parts of the same object (e.g., vegetable soup conducts heat to the handle of a spoon).
Convection is mostly transmitted through gaseous media such as air (for example, cats sleeping on a fire kang will feel warm). Thermal radiation occurs between objects that are not in contact (e.g., the sun radiates heat to the Earth).
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Heat Transfer: Heat is the energy transferred from a hotter object to a cooler object. For example, a lit match (a warmer object) will transfer heat to a large saucepan filled with warm water (a cooler object).
Note that the actual amount of heat energy per object is not important, as the warm water of the pot may have more heat energy than a match. What is required for heat transfer is the temperature difference between two objects. Without this difference, heat transfer would not have been possible.
There are three ways in which heat is transferred: conduction, convection, and radiation.
Conduction is the transfer of energy from one molecule to another through direct contact. This transfer occurs when molecules collide with each other, similar to a billiards game in which one moving ball hits another, causing the second ball to move. Conduction occurs in solids, liquids, and gases, but works best in materials with simple molecules that are in close proximity to each other.
For example, conductors of metal are better than conductors of wood or plastic.
Convection is the thermal movement of a fluid like water or air. Fluids (liquids or gases) move from one place to another and with it, transfer heat. The movement of a mass of hot water or air is called an airflow.
Radiation is an electromagnetic wave.
The process of transferring heat. When you stand under the sun, you are heated by electromagnetic waves that travel from the sun to the earth, which are mainly infrared radiation (there is also a small amount of visible light).
In addition to the sun, light bulbs, irons, and toasters also transfer heat through radiation. Note that unlike conduction or convection, radiative heat transfer does not require any substance to help in the transfer.
You can spot signs of heat transfer. You may see air flashing on the radiator (convection), put your hand on a warm spoon placed in a hot soup bowl (conduction), or notice that the sun is shining on your ** feeling warm (radiation). If you need heat or evidence of heat in your life, just feel your arm!
Your body is producing heat 24 hours a day!
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It is mainly divided into radiation, and then also includes heat conduction, as well as the way of convection, the heat energy transferred by different ways is also completely different, this can transfer heat energy, and then the range of influence is completely different.
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Heat conduction, heat convection, heat radiation, these are the three ways of heat transfer, heat transfer is a physical phenomenon.
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I think that the way heat is transferred in the anterior form is heat conduction, heat radiation, and heat convection. And heat transfer is a physical phenomenon, so we must pay attention to these aspects in our daily life.
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It will transfer heat through radiation, or conduction, and convection, which are the three ways of heat transfer, which can transfer a lot of energy to the object.
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1 Heat conduction: Objects (usually solids) with different temperatures come into contact to transfer heat.
2 Convection: A type of heat transfer in liquids and gases through which heat spreads evenly to every part of the whole.
3 Radiation: The way in which all objects transfer heat by seeing light, microwaves, etc.
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Heat conduction, heat radiation, and heat convection.
Mainly letters. Passed through the post station.
1. Definition: Heat conduction is a heat transfer phenomenon when there is no macroscopic movement in the medium, which can occur in solids, liquids and gases, but strictly speaking, only in solids is pure heat conduction, and even if the fluid is at rest, it will also produce natural convection due to the density difference caused by the temperature gradient, therefore, heat convection and heat conduction occur at the same time in the fluid. >>>More
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It's not Wang Guo's really, it's Wang Guowei's.
Wang Guowei said in "Words in the World": "Those who have become great careers and university questions in ancient and modern times must pass through three realms: 'Last night the west wind withered the green tree. >>>More