Nature Seeks a Balance

More like a tremendous fart in an empty auditorium...

If no one heard the fart,did it really happen?

(Presume the farter is deaf).

...or the hearing aid needs a new battery, perhaps.

A gas like air cannot have a negative pressure. If you put a liquid like water in a syringe and pull on it, it will boil (cavitate) leaving a bubble of water vapor, but a liquid might sustain some negative pressure if it is pure and there are no nucleation sites. Apparently, water in trees is under negative pressure.

A solid can have negative pressure. Consider a sphere made of material A on the inside and material B on the outside. If it is heated and material A has a lower coefficient of expansion than material B, the inside material will be under negative pressure (or tension).

I do not mean negative pressure, I mean differential pressure between the outside and inside,whatever the enclosure.

Negative pressure (vacuum) is always relative to the outside surroundings.

All this time I've been living under the belief that the earth sucked.

NAH.Just taxes.

I think nature seeks entropy. In the long run everything is going to a lower energy state.

Exactly what I said,just different wording.A sphere is the most efficient shape,max volume,minimum area.High flows to low,wheter energy or matter.Nature is trying to form Earth into a perfect sphere,eroding mountains,etc.That is why i think the void outside of our universe,(the Exoverse,I will call it) is at a lower energy state than our universe,creating a differential .If the matter and energy density in our universe is constant or increasing,then it is a internal pressure causing the expansion,if the density is decreasing,it is a "vacuum" in reference to the outside "Void".

Imagine a balloon being inflated.The pressure and density inside of the balloon is increasing until it reaches equilibrium with the outside pressure.But however,a bubble rising through a liquid will decrease in pressure as it rises and expands.

Our universe seems to be losing density as it expands,not due to an internal pressure,but an external void with less energy and matter(pressure).

No need to seek an internal source of our expansion.

Of course,this is just my opinion,one of almost 8 billion,so take it with a grain of salt.(How much do 8 billion grains of salt weigh?)My best SWAG is around 59-60 kilograms.

IMHO:Value $.02

Entropy exists because the universe is not expanding due to energy or matter increasing from within. The energy and matter density is decreasing, which is to say it is expanding into a less dense medium. A vacuum if you wish to think of it that way.Analogous to a helium balloon expanding as it rises.

I think this is beyond my mental capacity!! So let's throw another conjecture in the mix. Could our 3-dimensional world actually be a part of a 4-dimensional space? Not space-time, but 4 mutually perpendicular axes; call them x, y, z, and w, all perpendicular to the other 3. For those who are religiously inclined, this is like asking if God is a 4-dimensional being. Thinking very hard about this sort of thing can cause the brain to spasm.

If you can imagine it,it is possible.