România
Roportal.ro

CTRL + V NOW

Început de Observ, Joi 10 ian 2008 · 110 răspunsuri · 18.980 vizualizări

Sparkenbroke19.217 mesaje#63

Sa va simtiti bine, dragilor!

week-end placut!"

e un ascunzis, impatureste dezamagire si efort de bine, fara succes, de altfel...

EiNsTeIn'S~SoUl1.586 mesaje#66
PunkY StylE a scris:
( vezi ca n-ai tinut ritmul jocului cu descrieri)

P-asta o stiu :spiteful:

Many contemporary uses of uranium exploit its unique nuclear properties. Uranium-235 has the distinction of being the only naturally occurring fissile isotope. Uranium-238 is both fissionable by fast neutrons, and fertile (capable of being transmuted to fissile plutonium-239 in a nuclear reactor). An artificial fissile isotope, uranium-233, can be produced from natural thorium and is also important in nuclear technology. While uranium-238 has a small probability to fission spontaneously or when bombarded with fast neutrons, the much higher probability of uranium-235 and to a lesser degree uranium-233 to fission when bombarded with slow neutrons generates the heat in nuclear reactors used as a source of power, and provides the fissile material for nuclear weapons.

← Înapoi la Jocuri