On 5/24/2021 12:57 PM, Rod Speed wrote:


"trader_4" wrote in message
...
On Sunday, May 23, 2021 at 7:39:46 PM UTC-4, wrote:
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.

That's wrong, it was early gun type bombs that used uranium,
implosion devices use plutonium because plutonium required it.
AFAIK, the US only set off one of gun type, the bomb at Hiroshima.

The first test one in the USA was too.

The first test at Alamogordo was a plutonium implosion bomb. There were
questions whether the implosion process could be made to work. Uniform
compression with explosives was a big engineering problem.

The second bomb used, at Nagasaki, was also plutonium implosion.

Hiroshima was uranium gun type.


The detail of the various later tests is less clear.