SI unit of temperature, the absolute thermodynamic scale
0 K = absolute zero = -273.15 C, the lowest possible temperature
increments equal to Celsius degrees: a change of 1 K = a change of 1 C
defined since 2019 by fixing the Boltzmann constant at 1.380649e-23 J/K
surface of the Sun: ~5778 K
cosmic microwave background: 2.725 K
room temperature: ~293 K
named after Lord Kelvin (William Thomson)
the scale where all thermodynamic equations work directly: PV = nRT uses kelvin