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Concepts Of Physics MCQ Edition [Volume 2]PhysicsHeat and Temperature

Consider a system X that is neither in thermal equilibrium with system Y nor with system Z . The systems Y and Z

Options

  1. Amust have the same temperature as system X
  2. Bmust be in thermal equilibrium
  3. Ccannot be in thermal equilibrium
  4. Dmay be in thermal equilibrium

Correct answer

D. may be in thermal equilibrium

Step-by-step solution

Let T_X , T_Y , and T_Z be the temperatures of systems X , Y , and Z respectively. Since system X is not in thermal equilibrium with system Y , T_X T_Y . Since system X is not in thermal equilibrium with system Z , T_X T_Z . From these two conditions, it is possible that T_Y = T_Z (for example, T_X = 10^ C , T_Y = 20^ C , T_Z = 20^ C ) or T_Y T_Z (for example, T_X = 10^ C , T_Y = 20^ C , T_Z = 30^ C ). Thus, systems Y and Z may or may not be in thermal equilibrium.

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