Two materials are in thermal equilibrium if they are at the same temperature.
A system is in thermal equilibrium if every ongoing process is exactly balanced by its inverse.
balancing between incoming and outgoing radiation that keeps the internal temperature of the star constant at any point.
the state of objects in thermal contact when they no longer change each other's temperature.
the condition in which all objects in an isolated system are at the same temperature.
a state in which all parts of a system are at the same temperature
A balance between the input and outflow of heat in a system.