Absolute temperature and the kelvin scale - Khan Academy
https://www.khanacademy.org/science/in-in-class11th-physics/in-in-thermal-properties-of-matter/x7183bffa9768c609:in-in-measurement-of-temperature-and-pressure/v/absolute-temperature-and-the-kelvin-scale
WEBIf we want to know the temperature in Kelvin, all we need to do is take the temperature in Celsius and add 273.15 degree units to it. If we want to know the temperature in Kelvin for the freezing point of water, we take the temperature in Celsius which would be zero, and we add 273.15 units to it, and that would give us 273.15 Kelvin.
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