Cold is only a subjective term - I feel cold, This feels cold to me... - Even when comparing two things it would not be accurate to say this is colder
What is really going on is - what we see as cold is really (as others have said) A lack of energy or movement (Which amount to the same thing)
When I say movement I really mean it like this - When you Boil a pot of water you are imparting energy into the water atoms which now vibrate and move
around much more until eventually they escape as a gas...
If you do not boil the water it will remain less energetic forever until something puts that extra energy into it.
You need a source for the energy (An energy source) - You do not however need a source of lack of energy (that doesn't even make sense to say - say it
out loud - it really doesn't)
I imagine this is where most of the confusion comes from - This is one thing that unforgettably really is lop-sided - as you only need a source for
energy - and not a source for the lack of energy (that is just what it has as default) - if you want it to get more energy then you MUST put that
energy into it otherwise nothing else will happen.
At absolute zero - any atoms are not moving because they now have what we would consider no movement. - and therefore class it as zero energy - or
It is the temp it is - because that was what was measured on the scale when all movement stopped in the atoms.
Also to us cold feels like a physical thing like heat does - however this is just an illusion - Heat (or energy) Will want to even itself out (Just
like high and low pressures do - when you are feeling something "cold" - you really feel the heat energy your skin has transferring to the "colder"
object - the "colder" it is - the faster this transfer and so you feel it as a sharp coldness. (Again all subjective what you feel in this
When you feel something "hotter" than you - you are again feeling the heat energy transferring from the object to your "colder" skin - the exact same
thing happens as with "cold" but with one very important thing going on....
"heat" only travels one way - it always goes from "Hotter" to "Colder" - And never from "Colder to Hotter" - what you feel is the heat energy
transferring to you - this at least feels like whats happening subjectively - unlike when you feel a cold object (subjectively)
as a side note - there is also no source of low pressure either - it is a lack of matter this time as compared to the alternative high pressure - the
high pressure will want to push out - filling the low pressure environment until it is in equilibrium and now does not have high pressure compared to
any low pressure - the whole environment is now at the same pressure)
(Also there is no source of dark as again many have said - this is again an illusion - dark is just the default state of the universe without light
energy this time - what about a blind person also - they could be in the brightest room ever made - and would still see only dark - this is the case
because their eyes are not registering the light energy - so again even the human minds default is dark - without the extra light energy - where is
the source of the dark for a blind person? - there is none - it is again a lack of energy)
Also - if there had been a source of cold - we would have a perpetual motion machine - as that source would never run out - alas - it is not that
edit on 4-6-2017 by lightspeeders because: Added extra information
edit on 4-6-2017 by lightspeeders because:
(no reason given)