On Monday, 26 September 2016 16:34:38 UTC+1, vidcapper wrote:

Hot water and cold water are the same thing. That does not mean cold water does not exist.


What a strange argument.

In hot water, the molecules are moving faster than in cold water.
Therefore, for cold water to 'radiate' cold, that would require an input
of energy - where would than come from...

--

Paul Hyett, Cheltenham

Hot molecules have no input of energy. Why do cold molecules need one?

The cold molecules are still moving and that provides the energy for them to radiate, just as it does for hot molecules. Put them in space and they would lose all that energy and cool until they reached absolute zero. Well, actuallly the temperature of the background cosmic radiation.

It has been known since the 18th Century that all bodies radiate. It just that cold bodies radiate less energy than hot ones. You do know that don't you?