anyone guess the effects of cryogenic liquid on fissionable material?
442256
By cryogenic liquid, I'm assuming you mean something very cold, like liquid nitrogen, liquid oxygen, liquid helium, or liquid hydrogen.  And fissionable material is uranium or plutonium, so you're asking what happens when you make uranium cold?  \n\nRadiation is a nuclear process, not one that has to do with chemical reactions that are subject to fluctuations in temperature.  Whether the atoms are banging around with a lot of energy due to high temperature or very little due to low temperature, the nucleus's will continue to fission unperturbed.
648266
liquid? if u mean state of matter.
1026360
in theory, when the temp reaches absolute zero everything freezes and is -459.67 degrees F.  temps within a few billionths of a degree have been reached but the materials used in the experiment took on nontraditional states.  at the temp all molecular motion would cease so it would be impossible to reach the temp exactly.
1052558
In freezing, the latent heat of fusion in the water molecules is released with out the water changing its temperature. The molecules lose average kinetic energy, and start behaving like particles in a solid, with minimal vibrational movements and close seperations. The reverse process is melting, where latent heat of fusion is absorbed by the water molecules, increasing average kinetic energy which is used to break bonds between molecules so they start behaving like particles in a fluid.\n\nThe transition from liquid to vapour, and vice versa follows a similar path, except the heat energy required for the process is in this case called latent heat of vaporisation.
728471
Geomagnetic field reversals and changes in intensity are understandable from an energy standpoint as natural consequences of intermittent and/or variable nuclear fission chain reactions deep within the Earth. Moreover, deep-Earth production of helium, having 3He/4He ratios within the range observed from deep-mantle sources, is demonstrated to be a consequence of nuclear fission.
37
So the answer to your specific question is 'no'.  The problem is that if the container shines, it means that light and energy is being lost and will eventually run out.  There are materials that will glow for a long time due to radioactive decay or via chemical processes, but all of these are using up their 'fuel' in the process and will eventually run out.\nSome radioactive substances have a pretty long half-life and will appear to glow steadily without much decay over the scale of a human lifetime.\nNow, to get more generalized... it is possible to trap light in a container that doesn't shine. Scientists have been able to free light in its place using supercooled clouds of sodium which are naturally opaque, but can temporarily transmit light when altered via a laser beam.  If the laser is shut off, a light beam that is passing through the cloud will be temporarily frozen in place.  Australian scientists have recently been able to extend this interaction to be nearly as long as a second.\nOnce the laser is reintroduced the beam is recovered and continues on its way.  Now all this is a little debatable, since the photons actually get temporarily swallowed up by the material.  The photons that come out afterwards have the same configuration and quantum state as what went in, but whether they are exactly the same photons is more of a question for philosophy than for physics.
376519
Cryogenics is an exciting and important frontier that already has led to major discoveries...and holds much future promise. In the case of steel and its alloys, cryogenic treatment removes the built-in kinetic energy of atoms, which is the energy of motion. There is a normal attraction between atoms that makes them want to get together. But their energy of motion keeps them apart unless that energy is removed by low temperature cooling.
1064156
Cold fusion theory holds that nuclear fusion is possible at room temperature and normal pressure.  If possible, unbelievable amounts of energy could be made available for use without the dangers associated with traditional nuclear fusion.\n\nAs far as I know, no mainstream scientist considers cold fusion to possible.
959853
The atoms of iron begin to move at a more rapid pace, causing the material to expand.  Once it expands enough there is so much energy that it can turn into liquid form, allowing it to flow freely so long as another force isn't standing in it's way.  The same thing happens to all matter when heated up.  You may even notice that the metal will begin to glow.  This is because of radiation in the form of photon particles.  It will also become highly ductile and maliable, which are two characteristics that iron have.  Heck, if iron were to be heated up far enough it could even become a gas.  However, I doubt you would ever be able to do it without both heat and compression with current technology.  You might even cause the gasses in the atmosphere around it to gain enough energy to start a fusion reaction, which could cause one yucky mess out of our atmosphere if they don't cool down.
46832
This is too hypothetical to be a real problem.  The heat generated would also deform the steel.  For the current largest Thermonuclear bomb you would be looking at something approaching distances in the wall of the container approaching a mile.  Even this depends upon the volume contained within.\n\nFrom a practical aspect, if one took all of the world's current steel production for one year, you might have enough steel to construct such a device (about 5 million metric tons).  If you miscalculated, you would get an even larger boom (like putting a cherry bomb in a sealed pipe).\n\nA bomb is not a nuclear generator.  Read at the site below for information on a Soviet 100 megaton bomb:
330911
A system cooled by liquid nitrogen
149897
Depends on the temperature. At a guess at melting point not that different from solid aluminum.
124307
Excellent question. It is possible. I assume you mean the solid form of water (ice). It is theoretically possible. At this time finacially impossible. You would lose a percentage of the surface area of the ice by sublimation. How do you propose to freeze the water to begin with? How will you keep it frozen (remove absorbed heat energy)? Where will your source of water be? If you are taking water from Earth, how will you get it into space?
332731
It doesn't always have to be.  The values for the heat of fusion of ice that you are using were probably found using equipment sensitive to only two significant figures.  I have seen heats of fusion values that have had more than two sig figs, but they were probably found with more sensitive equipment.
1110130
There are a few things you need to know about fissionable materials. One, a good fissionable material goes though a fission reaction when it absorbs a neutron. Two, a good fissionable material releases more than an average of one neutron when it goes through a fission reaction. The material must be able to go through a fission reaction by absorbing a neutron that travels slower than the release speed of the previous reaction. Once you have the a material that fits those requirements the rest is a probability game. If you have a small amount of material within a set space the probability of a neutron from one fission event hitting another fissionable atom is very unlikely, but as more and more material is placed within a set volume the probability increases until a point where on average every reaction will lead to one additional reaction. This point is called critical mass. At this point you have a controlled chain reaction, and generate heat. Then you run some material through the reaction to transfer heat out of the reactor to a generator.
106178
Any closed container of liquid will explode if left in the freezer too long. The liqued will expand, increasing pressure on the container until it rips open spreading liqid over everything
1184856
Hydrogen.  Normally it is a gas at room temperature, and takes extreme cryogenic cold just to make it a liquid, but guess what?\n\nAt a few millionths of a degree above absolute zero, where Helium gas goes liquid, Hydrogen gas actually freezes...and when it does, it arranges itself so that it is physically *metallic*.\n\nAnd yes, this has been tested outside of an earthly laboratory, way outside....\n\nGo to Space.com, do a search on the phrases "core of Jupiter" and "meteor strikes"....a few years ago, a meteor shower hit Jupiter with some fairly large space rocks, and we had radio and satellite telescopes trained on the event....\n\nAnd there was a hypothesis that the core of Jupiter was cold enough and under enough pressure from gravity to be metallic hydrogen...the idea was simple enough, if the core was metallic hydrogen, then when the meteors hit it, it should ring like metal, not just acoustically, but electro-magnetically too, in a predictable way....\n\nAnd.  It.  Did.