Thursday, September 26, 2013

did u know . . . Celsius

did u know . . .
, also known as centigrade is a scale and unit of measurement for temperature. It is named after the Swedish astronomer Anders Celsius (1701–1744), who developed a similar temperature scale. The degree Celsius (°C) can refer to a specific temperature on the Celsius scale as well as a unit to indicate a temperature interval, a difference between two temperatures or an uncertainty. The unit was known until 1948 as "centigrade".
From 1743 until 1954, 0 °C was defined as the freezing point of water and 100 °C was defined as the boiling point of water.
The degree Celsius is a special name for the kelvin for use in expressing Celsius temperatures.
Fahrenheit (symbol °F) is a temperature scale based on one proposed in 1724 by the physicist Daniel Gabriel Fahrenheit (1686–1736), after whom the scale is named.[1] The scale is defined by two fixed points, i.e the temperature at which water freezes into ice is defined as 32 degrees, and the boiling point of water is defined to be 212 degrees.

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