ANSWER: There is no such thing as “Cold,” it is a relational thing. There is only heat and the absents of heat. A thermometer measures heat not cold. There is NO answer. Even if the weatherman predicted a temperature it would be mathematically incorrect. 0°F, 32°F, 0°C, are relative points we can relate to an event happening (such as water freezing or boiling), they are arbitrary points.

Same thing would be “DARK.” You build a darkroom for photography and seal all the cracks that let in light, then say, “It is really dark inside, maybe if I paint the walls black it will be twice as dark!” There is no such thing as dark, only the absents of light.

We use many words that have no quantitative measure: Fast, Slow, Hot, Cold, Dark, Empty… etc..

From these ‘green’ engineers I have heard minus such and such °F, such and such Kelvin, such and such °C, and a myriad of abstract answers. Older engineers smile and say, “Half as hot.” Knowing ‘Hot’ is also a relative term. Hearing that remark, the young engineers brains now go into overdrive with that concept. Everyone smiles as they leave the young engineers vigorously pecking away on their calculators…….