Re: The antics of thermodynamics, the depravity of relativity, the bunkum of quantum

jerryfriedman <jerry.friedman99@gmail.com> wrote:

On Sun, 9 Mar 2025 10:27:09 +0000, J. J. Lodder wrote:
 

Rich Ulrich <rich.ulrich@comcast.net> wrote:
>

On Sun, 9 Mar 2025 00:38:55 +0000, bertietaylor@myyahoo.com
(bertietaylor) wrote:
>

>
Wrong analogy. The balloon is full of pressurised gas and in every point
within the balloon the pressure is the same. The Earth is solid, which
melts after someway down, then again becomes hot solid, then cold solid,
then very cold solid at the core, cold enough to support superconducting
currents.

>
I hadn't figured out that system before.

>
Then don't.
You have allowed yourself to be misled by our resident nutter.
The pressure in a balloon in NOT the same at every point.
There is a pressure gradient.
In fact, that pressure gradient is precisely the reason why it floats.
It took a real genius, named Archimedes, 2500 years ago,
to see that.

 
That is, the similar pressure gradient in the air
/around/ a helium or hot-air balloon is why it floats.

The thing is open at the bottom.
It has just the same pressure gradient inside.

Even if it is a closed toy balloon under internal pressure
it still has an (now irrelevant) pressure gradient inside.

Okay, I can imagine the the center is slightly less compressed
than what surrounds it.

>
I'm sure you can imagine it, if you have practiced enough with Alice,
but it is impossible nevertheless.
>

But you seem to imagine that heat and pressure are not
transmitted toward the center.  Over millenia, the center will
approach the temperature of what surrounds it. And the pressure.
Equilibria.
>
But the planet is cooling.

>
Not. It is in a quasi-stationary state.

 
Quasi-stationary, but actually slowly cooling, as
the rate of radioactive heating decreases?

Of course, it is a matter of time scales.
(that is what quasi-stationary means)

The time scale for conductive settling of temperature equibrilium
of the whole Earth is of the order of some tens of millions years.
(by William Thomson, aka Lord Kelvin, who pestered Darwin with it)
Radioactive timescales are of the order of a billion years.
So 'quasi-stationary equilibrium' is quite appropriate.

Jan

The center can only lose heat through the surrounding layers.

>
Correct.
>

So whatever max heat was reached by the center, it will be the last to
be touched by the cooling of the planet.

>
More nonsense.
Hint: there is radioactive heating throughout,

 
I agree with the rest of what you wrote.
 
--
Jerry Friedman
 
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