Question about magnetizing and the First law of Thermodynamics

In summary, the conversation discusses the idea of using magnets to exert mechanical power and the resulting energy exerted on a pea placed between them. The question is posed whether the same amount of mechanical power can be used to create the magnets and if one pea would have more energy exerted on it than the other. The concept of electromagnetic field energy and its relationship to the energy used to crash the pea is also mentioned.
  • #1
Emeth
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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?
 
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  • #2
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. How does magnetizing a material relate to the First Law of Thermodynamics?

Magnetizing a material involves the transfer of energy to align the magnetic domains within the material. This transfer of energy is governed by the First Law of Thermodynamics, which states that energy cannot be created or destroyed, only transferred or converted from one form to another.

2. Can magnetizing a material violate the First Law of Thermodynamics?

No, magnetizing a material does not violate the First Law of Thermodynamics. The energy used to magnetize the material comes from an external source, such as an electric current, and is not created or destroyed within the material itself.

3. How does temperature affect the magnetization process?

Temperature can affect the magnetization process in two ways. First, higher temperatures can cause the magnetic domains within a material to become disordered, reducing the overall magnetization. Second, the energy required to magnetize a material may change with temperature, as some materials have a temperature-dependent magnetic susceptibility.

4. Is the First Law of Thermodynamics applicable to all types of magnetization?

Yes, the First Law of Thermodynamics applies to all types of magnetization, including permanent magnetization and induced magnetization. In both cases, energy is transferred to the material to align the magnetic domains, and this energy transfer is subject to the First Law.

5. Can the magnetization process be reversed without violating the First Law of Thermodynamics?

Yes, the magnetization process can be reversed without violating the First Law of Thermodynamics. This is because the energy used to magnetize the material is not destroyed, but rather converted back to its original form when the material is demagnetized.

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