Kelvin Scale: The Kelvin scale is an absolute temperature scale where the lowest possible temperature is defined as absolute zero, which is 0 K. The Kelvin scale is used to measure the kinetic energy of particles and is directly proportional to the average kinetic energy of the particles in a substance.
Thermal Energy:Thermal energy is the internal energy of an object or system due to the vibration and movement of its particles (atoms and molecules). It is directly related to the temperature of the object and is a measure of the average kinetic energy of the particles.
Thermal Equilibrium:Thermal equilibrium is a state where two or more objects or systems in thermal contact with each other have the same temperature. When objects are in thermal equilibrium, there is no net transfer of thermal energy between them.