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Zeroth law and its significance
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Statement: Consider three bodies A,B and C. If A is in thermal equilibrium with B and B is in thermal equilibrium with C then A will also be in thermal equilibrium with C.

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Significance:

  • It has wide applications in thermometry.

  • If body C is a thermometer and it’s used to measure temperatures of A and B. If it shoes both the readings as same, then C is infact showing its own temperature.

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