Hint: it’s not 50 degrees Fahrenheit.
100 ℉ = 311 K, half of which is 105.5 K = −180℉
Yup — half of 100℉ is −180℉.
The difference between the Kelvin scale ℝ⁺ and the Fahrenheit scale is like the difference between a linear scale and an affine scale. You…