even though this is a bit of fun why are people just coming up with figures and no explanation of how they came up with it ? Int that a teensy bit pompous to assume that everyone will accept that they are correct?
I think that is part of the fun... and allows one to puzzle over the answer.
"Twice as hot" is a pretty simple concept, take the temperature on your favorite temperature scale, Kelvin, Celsius, or Fahrenheit, and double it, although scientifically speaking, one should use Kelvin for such a comparison.
"Twice as cold" is much more ambiguous because if you double a temperature, you get something hotter.
2 x 0°C = 0°C.
˝ x 0°C = 0°C.
Well, that weatherman can't be correct because 0 degrees C = 273.15 K, and twice as cold will then be 136.575 K, or -136.575 degrees C. I think the whole world would come to a stop if it were to become that cold...
Both these are the same, using half the temperature in Kelvin
, rather than "twice as cold".
Stands to reason it will be 16F.
0°C = 32°F. So, half that temperature in Fahrenheit is 16°F, or -8.89°C
Keep in mind that Fahrenheit
is widely used in the USA for ambient temperatures.
Obviously, it will be 245.8 degrees.
Ok, on the Rankine Scale
, 0°C = 491.67 °R.
Half of 491.67 °R = 245.8°R
If 70°F (21°C) is considered "comfortable".
So... 0°C would be 21 degrees Cold.
So, twice as cold would have to be -21°C, or -6°F
Here I tried to redefine what "cold" means. In this case, anything below your "optimum" temperature is considered "cold", and anything above it is "hot". So, once one gets a "cold scale", it is easy enough to double it.
In a Geezeresque fashion, let me try another answer using the Delisle Scale.
. This scale has the advantage over the other scales in that the larger the number, the colder the temperature.
0°C = 150°De
One can then easily calculate that twice as cold would simply be 150°De x 2 = 300°De, or −100.00°C, or −148.00°F.
See what you get for asking such a question in a "Science Forum"