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pixel01
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I have a question about magnetic bars. If we froze a magnetic bar down to zero Kelvin, does it still have a magnetic field?
pixel01 said:OK, we can not reach absolute zero, but we can reach as low as several K. So what does the magnetic field change when the m-bar is freezed to that low temperature? Will it increase or decrease?
Freezing to zero Kelvin, also known as absolute zero, is significant because it is the lowest possible temperature that can be achieved. At this temperature, all molecular motion ceases and the particles of a substance are in their lowest energy state. This provides insight into the fundamental behavior of matter and is a key concept in thermodynamics and quantum mechanics.
The magnetic bar question explores the behavior of a magnetic bar as it is cooled to absolute zero. At this temperature, the particles of the magnetic bar are in their lowest energy state, resulting in a complete absence of magnetic field. This helps illustrate the effects of temperature on magnetic properties and can be used to study the behavior of other materials at extremely low temperatures.
No, it is impossible to reach absolute zero in practice. As we approach this temperature, the energy required to lower the temperature becomes infinitely large, making it physically impossible to reach. Additionally, quantum mechanical effects prevent particles from being in a completely motionless state.
The study of absolute zero and its effects on materials is important in fields such as cryogenics, superconductivity, and quantum computing. It also has practical applications in the development of more efficient refrigeration and cooling systems.
Yes, some materials such as certain metals, alloys, and ceramics have been found to exhibit superconductivity at absolute zero or very close to it. These materials have potential applications in areas such as energy transmission and magnetic levitation.