What is the source of cold in the universe?

a reply to: Willtell

Cold doesn't exist. Only heat exists.

You feel the lack of heat and describe it as being cold. But relatively speaking what you think of as cold can be hot when compared to something with less heat.

Cold doesn't exist. It's a word used to describe how much heat there is.

a reply to: OccamsRazor04

Next you'll be saying that darkness doesn't exist.

Yes, cold has no source, just as darkness has no source. Both are the absence of something, both are a void.

a reply to: SirHardHarry

Depends on if you believe in reincarnation.

originally posted by: SirHardHarry

Or good and bad.

a reply to: Phage

It doesn't. Outside of women's hearts of course. Same with cold.

originally posted by: OccamsRazor04
a reply to: SirHardHarry

Depends on if you believe in reincarnation.

I was speaking of biological life, not the idea that energy never dies.

Cold is a sink for heat, and heat is a sink for cold. Thermodynamics
says that there is cold and heat each separate.

Heat and cold are radiators or collectors of thermal energy.

It must have been very cold at the time of the Big Bang.

a reply to: SirHardHarry

And I was joking.

a reply to: Willtell

It is not cold but a lack of energy.

Look at it another way, if you could slow down your own personal time, the more slowly your personal time passed the hotter and brighter the universe would seem to you, conversely if you sped up your personal time so that the universe seemed to slow down the darker and colder the universe would seem to you.

It is not however that time is moving at different rate's - it may actually be so in the presence of gravitational field's - but that the distribution of energy, matter and gravity across the known universe is not even, some places have far less energy and of course unless there is some perpetual source of energy all that energy has to dissipate and eventually in an entropic universe without a perpetual source of new energy it will simple even out, slow down and become very cold (Still is a better description than cold).

Personally I believe there may indeed be a perpetual source of energy but our universe from our perspective is moving ever further away from that source which may be something called a white hole which spew's time and energy outward, by it's very nature though it would be beyond the boundary of a black hole from us essentially isolating our universe from it's life giving energy and dooming it to entropy, in this view the universe can be seen as a ripple effect, the further the ripple expand's from it's point of origin the more the limited energy is spread out and used up.

a reply to: ThatHappened

Heat flows toward cold, not cold toward heat. 2nd law of thermodynamics. The basis for entropy.

a reply to: Willtell

Let me try...

If I have a cup with nothing in it, I can find a source of water and fill up the cup from that source. There is no source of empty, only a source of what keeps the cup from being empty.

Heat is the same way. Heat is just energy, which can be radiative (infrared EM waves), or kinetic (motion of molecules) but it's still energy. You can think of molecules being empty cups filled up to some point from an energy source. But asking where the source for a lack of energy is, is akin to asking where is the source for empty in an empty cup. It just don't make sense.

Oh, and the reason absolute zero is -273 degrees Celsius is because water freezes at sea level on the earth 273 degrees Celsius above absolute zero. It's just an accident. Celsius was developed long before absolute zero was discovered.

TheRedneck

originally posted by: SirHardHarry
a reply to: Willtell

we know not the physical source of cold...
Just saying its a lack of heat doesn't answer the question, I'm afraid

There is no physical "source." It's the absence of.

Exactly/
Asking about the "source" of cold is like asking, "What is the source of silence?" Or, "What is the source of darkness?"

roadgravel, in the case of a space heated by a meager source,
the cold consumes the heat.

Here's an article on this subjective thermodynamic term:

"https://en.wikipedia.org/wiki/Cold"

en.wikipedia.org...

a reply to: roadgravel

a reply to: Willtell

Geez! The obvious answer: The source of cold is lack of heat. NEXT!

a reply to: ThatHappened

Heat (energy) flows to a cooler object (transfers energy to the low state). To cool something, like using refrigeration, energy is being added into a system. In a closed system, it doesn't happen. The 2nd law.

originally posted by: mysterioustranger
a reply to: Willtell

Geez! The obvious answer: The source of cold is lack of heat. NEXT!

Nothing comes from a lack of something…

Then it would be nothing, something indefinable.

The question is not what it is but where it comes from physically

So then, if we say Heat comes from a lack of cold that doesn’t define where the physical heat comes from it only defines the circumstance of its existence in the moment

a reply to: Willtell

There is no air in space.

Imagine the heating bill for something the size of the universe.

What is the source of cold in the universe?

Climate change.