Is it important to convert temperatures to the Kelvin scale when we use Newton’s law of cooling? Why or why not?
Solution 50E Whenever we do calculations related to temperature, we always change the scale to kelvin scale. This is the absolute scale of temperature. When we consider Newton’s law of cooling, as it depends only on the temperature difference between the system and the surrounding, there is no need to convert the temperatures into kelvin. When we calculate the temperature difference, it is same whether in kelvin scale or any other scale. So it’s not so important to convert it into kelvin. If still someone is interested in working with kelvin scale, then he/she could do it. Without losing generality, we should keep it in mind that, Newton’s law of cooling is only concerned about the temperature difference which is independent of the scale chosen by us.