# Question about magnetizing and the First law of Thermodynamics

• B
• Emeth

#### Emeth

TL;DR Summary
If you make two magnets with a pea inbetween them so they squash the pea upon their creation where does the energy squashing the pea come from?
I've been learning a lot about life from Internet searches and I do hope this isn't too basic of a question for you gurus.
If I had two pieces of iron next to each other with a pea in-between and two pieces of cobalt with a pea in-between. Then I magnetized the four pieces of metal by brushing them with magnets so that the pea was pushed on by the created magnets. Could you use exactly the same mechanical power to make those magnets? If so would one pea have more energy exerted on it?

Emeth said:
Summary:: If you make two magnets with a pea inbetween them so they squash the pea upon their creation where does the energy squashing the pea come from?
After the pea crash the two magnets are closer in distance so electromagnetic field energy in space is lessened. The pulled out energy was used to crash the pea.

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## 1. What is magnetizing and how does it relate to the First Law of Thermodynamics?

Magnetizing refers to the process of aligning the magnetic domains within a material, resulting in the material becoming magnetic. This process can be achieved through various methods such as stroking with a magnet or passing an electric current through the material. The First Law of Thermodynamics, also known as the Law of Conservation of Energy, states that energy cannot be created or destroyed, only transferred or converted from one form to another. This means that the energy used to magnetize a material must come from another source, as it cannot be created out of nothing.

## 2. How does the First Law of Thermodynamics apply to magnetization in everyday life?

In everyday life, the First Law of Thermodynamics can be seen in action when using appliances such as refrigerators or air conditioners. These devices use energy to move heat from one place to another, resulting in a cooling effect. The energy used in this process is converted into magnetic energy to power the compressor, which is then converted back into heat energy to cool the surrounding space. This shows the transfer and conversion of energy, in accordance with the First Law of Thermodynamics.

## 3. Can magnetization violate the First Law of Thermodynamics?

No, magnetization does not violate the First Law of Thermodynamics. The law simply states that energy cannot be created or destroyed, and magnetization is a process that uses existing energy to align the magnetic domains within a material. This process does not create energy, but rather converts it from one form to another, in accordance with the law.

## 4. Is there a limit to how much a material can be magnetized?

Yes, there is a limit to how much a material can be magnetized, known as the saturation point. This is the point at which all the magnetic domains within a material are aligned, and any further increase in magnetization would require a significantly larger amount of energy. Beyond this point, the material becomes harder to magnetize, and the increase in magnetic field strength becomes very small.

## 5. How does the First Law of Thermodynamics relate to the conservation of magnetic energy?

The First Law of Thermodynamics states that energy cannot be created or destroyed, only transferred or converted. In the case of magnetization, the energy used to align the magnetic domains within a material is converted into magnetic energy. This magnetic energy can then be used to perform work or be converted back into other forms of energy. This shows the conservation of magnetic energy, in accordance with the First Law of Thermodynamics.