The only protection is to keep the mass of U-235 below a certain "critical" size. Scientists had to calculate this sizethey could not experiment in a laboratory to find it out. The bomb had to be made in two parts. Each part would be below...英国华人论坛
They were filled with TNT, a powerful explosive, and they weighed a ton, 2,000 pounds, each. Then on August 6, 1945, an American air-plane dropped a single bomb on the city of Hiroshima, in Japan. Unlike t n t bombs, this one was made to exp...英国华人论坛
Dimitri Gauthier-Arapoglou, director of marketing and business development for the 7-year-old engineering firm, said Altitude Aerospace came to the rescue by shedding 220 pounds about 100 kilos from the combined weight of eight doors o...英国华人论坛
Having arrived on Tuesday morning; myfirst pre programmed thought was to visit the venue in advance of theOpening Leadership keynote on Wednesday morning. This was to provedifficult as we were to learn that a bomb had been found in the Grand...英国华人论坛
A Ballistic blanket or a bomb blanket is a particular blanket that is specifically designed to protect some life from bullet attacks, metal fragment, shrapnel, and etc. This ballistic blanket is commonly used in the military including used...英国华人论坛
Bright, shiny and almost invincible. This is how tik makes the user feel. Suddenly she's the most attractive, confident, creative, fascinating woman and has boundless energy to tackle even the most menial chores. In fact, even washing laundr...英国华人论坛
We have been made very aware through different forms of media that some of the big names on the Internet have closed their doors. The sale of personal computers and IT job availability in many countries has slowed down.After every boom; ther...英国华人论坛
Among the myriad subjects now commonly addressed in employee training is harassment. Sexual harassment, as well as age, disability and race discrimination, are among the types of harassment employees experience in the workplace. But it wasn'...英国华人论坛