The Zeroth Law of Thermodynamics states that if two systems are each in thermal equilibrium with a third system, then they are in thermal equilibrium with each other. This law helps establish the concept of temperature and provides a foundation for defining temperature scales, ensuring that if two bodies are the same temperature, they will not exchange heat when in contact. It plays a crucial role in the understanding of thermal systems and their interactions, which also leads into the First Law of Thermodynamics regarding energy conservation and transfer.
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