Celsius conversion factors

Integers and exact numbers In multiplication or division by an integer or an exact number, the uncertainty of the result is determined by the measured value. Some unit conversion factors are defined exactly, even though they are not whole numbers. For example, 1 in. is defined as exactly 2.54 cm and the 273.15 in the conversion between Celsius and Kelvin temperatures is exact so 100.000°C converts into 373.150 K. 

Still other units encountered in the literature and workplace come from various other systems (absolute and otherwise). These include metric systems (c.g.s. and MKS), some of whose units overlap with SI units, and those (FPS) based on English units. The Fahrenheit and Rankine temperature scales correspond to the Celsius and Kelvin, respectively. We do not use these other units, but some conversion factors are given in Appendix A. Regardless of the units specified initially, our approach is to convert the input to SI units where necessary, to do the calculations in SI units, and to convert the output to whatever units are desired. 

To convert from degrees Fahrenheit to degrees Celsius, you would need to subtract 32 to get to the reference point (0°C), and then use a conversion factor (determined above) so that the units cancel appropriately. Write an equation for this. 

Celsius scale (2.6) centigrade scale (2.6) coefficient (2.2) conversion factor (2.1) cubic meter (2.3) density (2.5)... 

A degree is both a temperature and a temperature interval, a fact that sometimes leads to confusion. Consider the temperature interval from 0°C to 5°C. There are nine Fahrenheit and nine Rankine degrees in this interval, and only five Celsius degrees and five Kelvin. An interval of 1 Celsius degree or Kelvin therefore contains 1.8 Fahrenheit or Rankine degrees, leading to the conversion factors... 

Note These conversion factors refer to temperature intervals, not temperatures For example, to find the number ot Celsius degrees between 32 F and 212°F you can say that... 

The conversion factor for Fahrenheit to Celsius is (hint subtract 32 so that both numbers start at the same temperature)... 

The conversion of temperatures is carried out slightly differently. Because the Fahrenheit degree (°F) is smaller than a Celsius degree by a factor of 9 (because there are 180 Fahrenheit degrees between the freezing point and boiling point of water but only 100 Celsius degrees between the same two points) and because 0°C coincides with 32°F, we use... 

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