On Sun, 23 May 2021 18:21:22 -0400, Ralph Mowery
wrote:

In article , says...

** "Water is incompressible"

IIRC, it actually is but it takes a really large amount of energy. If
the sun were 100% converted to energy, it still wouldn't be enough.


I doubt that.
And what volume of water compressed by how much?

Plutonium "fission" atom bombs originally (and probably still) work on
"implosion". Explosives around the plutonium reduce the volume of the
solid metal sphere to 1/2 the original volume (so the entire sphere is
suddenly "critical").



The info I see is the plutonium is a hollow sphere filled with hydrogen
gas, so relative easy to compress with the bomb around it that sets it
off. It is not a solid sphere.

No Plutonium bombs were "gun" type bombs. Half the Pt was at one end
of the "barrel" and it was fired into the other half to become
critical.

Gun types won't compress uranium enough to go critical so is a sphere
with explosives all around, timed perfectly to focus the pressure wave
into the center form all sides at once.

For all practical purposes water is incompressible. I am sure it could
be compressed if it fell into a black hole.

Everything is compressible, to some degree. Water compresses at ~50
ppm per atm (water isn't special in this regard). It's certainly not
enough for this application but not absolute either.