Verbal agreements are only as good as the paper they are written on. If your friend hasn't paid you for almost a year I wouldn't hold my breath waiting. Just be glad it only cost yo $500 to find out how good a friend they were. It could have cost you thousands of dollars.
Nuclear Materials. Nuclear materials are the key ingredients in nuclear weapons. They include fissile, fussionable and source materials. Fissile materials are those which are composed of atoms that can be split by neutrons in a self-sustaining chain-reaction to release energy, and include plutonium-239 and uranium-235.
Nuclear energy is derived from uranium, a radioactive element. When the nucleus of an atom of U-235, an isotope of uranium, is split by a neutron, it releases heat and other neutrons.ome countries such as Sweden and Russia also use the heat generated from nuclear fission to directly heat homes and buildings. Nuclear energy has other applications as well: 200 smaller nuclear reactors power 150 ships worldwide, including nuclear submarines, icebreakers and aircraft carriers.