How Do You Calculate Temperature Error When Converting from Celsius to Kelvin?

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To calculate the temperature error when converting from Celsius to Kelvin, the error remains the same, so for T=23 °C ± 0.5, the error in Kelvin is also ± 0.5. The conversion from Celsius to Kelvin involves adding a fixed constant (273.15), which does not affect the error. It is generally assumed that the constant is perfect, meaning any potential error in its value is negligible compared to experimental errors. Therefore, the error in temperature does not change during this conversion.
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Error treatment on temperature~~

I recently did an experiment at school. I don't know how to calculate the error of temperature after changing the unit of temp. from degree celsius to kelvin. Here is the question.

Let T=23 °C ± 0.5
What is the error after changing the unit to kelvin?

Should I keep dT/T=dT'/T' (T and T' are the temperature in degree celsius and kelvin respectively)? Or do it in other ways?
 
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The unit size didn't change, you just added a fixed constant to the °C. So the error remains the same, ± 0.5 °

If you have an error value for that constant then by all means include it in the calculation, but typically you'd assume it's a "perfect" constant (or at least that any error in its value is far, far smaller than those in your experimental values).
 
The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?

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