(symbol: K). Absolute zero, the lowest temperature, is now defined as being exactly and .

History

In 1742, Swedish astronomer Anders Celsius (1701-1744) created a temperature scale that was the reverse of the scale now known as "Celsius": 0 represented the boiling point of water, while 100 represented the freezing point of water. In his paper Observations of two persistent degrees on a thermometer, he recounted his experiments showing that the melting

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