Fahrenheit and Celsius are units used to measure temperature. Most countries in the world, including China, use degrees Celsius. Only five countries in the world use Fahrenheit, including Bahamas, Belize, British Cayman Islands, Palau, the United States of America and other dependent territories (Puerto Rico, Guam, and the US Virgin Islands).
Centigrade, expressed by the symbol℃, is the unit of centigrade scale (C). The conversion formula between centigrade scale (C) and Fahrenheit scale (F) is: C=(F-32)÷ 1.8, F= 1.8×C+32. For example: 0℃ = (1.8× 0+32) F = 32 F, 30℃ = (1.8× 30+32) F = 86 F,104 F = [(.
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1 and Kelvins are thermodynamic temperature scales or absolute temperature scales, which are degree-day in the international system of units. Kelvin temperature is often expressed by symbol K, and its unit is open. Every change 1K is equivalent to a change 1℃, and the calculation starting point is different. Centigrade is based on the temperature of ice-water mixture, while Kelvin is based on absolute zero, that is, -273. 15℃=0K.
2. Rankine temperature sale is also an absolute temperature scale, expressed by R, and its temperature interval is the same as Fahrenheit scale. The relationship between Rankine temperature and Fahrenheit temperature is [r] = [f]+459. 67. The conversion formula between Rankine temperature and international temperature scale is [r] =1.8 * [k].
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