## Measurement unit: degree newton

Full name: degree newton

Plural form: degrees newton

Symbol: °N

Alternate spelling: N

Category type: temperature

Scale factor: 3.030303030303

## SI unit: kelvin

The SI base unit for temperature is the kelvin.
1 kelvin is equal to 0.33 degree newton.

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## Definition: Newton

The newton scale is a temperature scale devised by Isaac Newton around 1700. Applying his mind to the problem of heat, he elaborated a first qualitative temperature scale, comprising about twenty reference points ranging from "cold air in winter" to "glowing coals in the kitchen fire". This approach was rather crude and problematical, so Newton quickly became dissatisfied with it. He knew that most substances expand when heated, so he took a container of linseed oil and measured its change of volume against his reference points. He found that the volume of linseed oil grew by 7.25% when heated from the temperature of melting snow to that of boiling water.

After a while, he defined the "zeroth degree of heat" as melting snow and "33 degrees of heat" as boiling water. He called his instrument a "thermometer".