Changes

The '''Celsius''' is used by scientists to measure [[temperature]].  The scale was originally defined such that at standard atmospheric pressure [[water]] freezes at 0 ºC and boils at 100 ºC.  To convert from [[Fahrenheit]] to Celsius take the Fahrenheit temperature, subtract 32 then multiply by 5 and divide by 9.

The '''Celsius''' is used by scientists to measure [[temperature]].  The scale was originally defined such that at standard atmospheric pressure [[water]] freezes at 0 ºC and boils at 100 ºC.  To convert from [[Fahrenheit]] to Celsius take the Fahrenheit temperature, subtract 32 then multiply by 5 and divide by 9.

One Celsius degree is equal to one degree [[Kelvin]], with an offset such that T(°C) = T(K) - 273.15.  So Kelvin's [[absolute zero]] (the temperature at which there is no heat) is -273.15 degrees Celsius.

One Celsius degree is equal to one [[Kelvin]], with an offset such that T(°C) = T(K) - 273.15.  So Kelvin's [[absolute zero]] (the temperature at which there is no heat) is -273.15 degrees Celsius.

Celsius is the commonly used unit of temperature in Europe and Canada, but in the United States, Fahrenheit is still preferred.  

Celsius is the commonly used unit of temperature in Europe and Canada, but in the United States, Fahrenheit is still preferred.