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The theoretical temperature is determined by extrapolating the ideal gas law; by international agreement, absolute zero is taken as 0 kelvin (International System of Units), which is −273.15 degrees on the Celsius scale, [1] [2] and equals −459.67 degrees on the Fahrenheit scale (United States customary units or imperial units). [3]
In the southern part of Finland, -15 °C (5 °F) is considered the limit of severe frost. The thermometer in the picture shows -17 °C (1.4 °F). The English word "frost" has 2 base meanings that are related to each other but nevertheless sufficiently different: temperature of air below the freezing point of water (ca 273 K)
The 0 °C isotherm under normal conditions. The freezing level, or 0 °C (zero-degree) isotherm, represents the altitude in which the temperature is at 0 °C (the freezing point of water) in a free atmosphere (i.e. allowing reflection of the sun by snow, icing conditions, etc.).
Anders Celsius's original thermometer used a reversed scale, with 100 as the freezing point and 0 as the boiling point of water.. 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. [5]
0 °C = 32 °F. A degree of frost is a non-standard unit of measure for air temperature meaning degrees below melting point (also known as "freezing point") of water (0 degrees Celsius or 32 degrees Fahrenheit). "Degree" in this case can refer to degree Celsius or degree Fahrenheit.
Below zero wind chills extended as far south as Oklahoma and the Texas Panhandle. In South Dakota, Sioux Falls reached a high temperature of -1 degrees on Tuesday, breaking the daily record for ...
'Warmed up to 24 below zero' In Minot, North Dakota, city spokeswoman Jen Kleen her car's temperature gauge said it was minus 32 degrees while she was driving to work on Tuesday morning.
Infinite temperature (coldness zero) is shown at the top of the diagram; positive values of coldness/temperature are on the right-hand side, negative values on the left-hand side. Certain systems can achieve negative thermodynamic temperature ; that is, their temperature can be expressed as a negative quantity on the Kelvin or Rankine scales.