The relationship between degrees Celsius and degrees Fahrenheit is not proportional, as they do not share a common zero point. Converting between the two scales requires considering differences in zero points, resulting in a linear relationship. Kelvin is recommended for expressing Charles's Law as a direct proportionality.
The relationship between degrees Celsius and degrees Fahrenheit is not proportional because the two temperature scales do not share a common zero point, leading to a linear relationship instead of a direct proportionality.
For example, when converting Celsius to Fahrenheit, you need to consider the differences in the scales' zero points in addition to using a conversion factor. This makes the relationship between them linear (y = mx + b) rather than proportional (y = mx).
Therefore, if expressing Charles's Law as a simple direct proportionality, it is recommended to use the Kelvin temperature scale.
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