Two bodies are in thermal equilibrium when:

  1. they are made of the same material
  2. they are at the same temperature, so there is no net heat flow between them
  3. they have the same mass
  4. they have the same internal energy
Answer

B) they are at the same temperature, so there is no net heat flow between them

Equal temperature means no net energy transfer. SLO P-12-C-01 · Knowledge

Physics MCQ · More Kinetic Theory and First Law of Thermodynamics MCQs · Practise