Cleverbot.com - a clever bot - speak to an AI with some Actual Intelligence? Breathingearth - CO2, birth & death rates by country, simulated real-time. Our amazing planet: Top to bottom & Bits and Pieces. 12 Things That Occur When You Die. Nuclear Weapons - basic technology concepts [UNC] A few words about nuclear weapons technology.. Fission weapons Nuclear weapons exploit two principle physical, or more specifically nuclear, properties of certain substances: fission and fusion. Fission is possible in a number of heavy elements, but in weapons it is principally confined to what is termed slow neutron fission in just two particular isotopes: 235U and 239Pu. These are termed fissile, and are the source of energy in atomic weapons.
An explosive chain reaction can be started with relatively slight energy input (so-called slow neutrons) in such material. An actual 239Pu ingot, alloyed with gallium for improved physical properties Isotopes are 'varieties' of an element which differ only in their number of neutrons. For example, hydrogen exists as 1H 2H and 3H -- different isotopes of the same chemical element, with no, one, and two neutrons respectively. All the chemical properties, and most of the physical properties, are the same between isotopes.
The Dark Side of Success: Google in the Courtroom. The more successful you become, the bigger your legal team needs to be. Or so it seems. Competitors, ex-employees and nut jobs all want a piece of the action. And if it’s not them, it’s the government trying to to curb your reach. Then again, with a battalion of top-tier lawyers at your disposal ready to bury plaintiffs in paperwork and motions, who would dare to take you on? This is part of a special infographic series by Search Engine Journal. Jenise is CEO of Alpha Brand Media, publisher of Search Engine Journal.