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Little Boy was the codename of the atomic bomb which was dropped on Hiroshima, on August 6, 1945 by the 12-man crew of the B-29 Superfortress Enola Gay, piloted by Colonel Paul Tibbets in the 393d Bombardment Squadron, Heavy of the United States Army Air Forces. [1] It was the first atomic bomb ever used as a weapon and was dropped three days before the " Fat Man" bomb was used against Nagasaki. [2]The weapon was developed by the Manhattan Project during World War II. It derived its explosive power from the nuclear fission of uranium 235. The Hiroshima bombing was the second man-made nuclear explosion in history (the first was the "Trinity" test), and it was the first uranium-based detonation ever. Approximately 600 milligrams of mass were converted into energy. It exploded with a destructive power equivalent to between 13 and 16&_160;kilotons of TNT (estimates vary) and killed approximately 140,000 people including associated effects. Little boy was named after Robert Oppenheimer the scientific head of the project. The Mk&_160;I "Little Boy" was 10&_160;feet (3&_160;m) in length, 28&_160;inches (71&_160;cm) in diameter and weighed 8,900&_160;lb (4000&_160;kg). The design used the gun method to explosively force a hollow sub-critical mass of uranium-235 and a solid target spike together into a super-critical mass, initiating a nuclear chain reaction. This was accomplished by shooting one piece of the uranium onto the other by means of chemical explosives. It contained 64&_160;kg of uranium, of which 0.7&_160;kg underwent nuclear fission, and of this mass only 0.6&_160;g became energy. No full test of a gun-type nuclear weapon had occurred before the "Little Boy" device was dropped over Hiroshima. The only test explosion of a nuclear weapon had been of an implosion-type weapon using plutonium as its fissionable material, on July 16, 1945 at the Trinity test. There were several reasons for not testing the "Little Boy" device. Primarily, scarcity of uranium-235 compared with the relatively large amount of plutonium which, it was expected, could be produced monthly from the Hanford reactors. Additionally, the weapon design was conceptually simple enough that it was only deemed necessary to do laboratory tests with the gun-type assembly (known during the war as "tickling the dragon's tail"). Unlike the implosion design, which required very sophisticated coordination of shaped explosive charges, the gun-type design was considered almost certain to work without full testing.
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Showing 1 to 8 of 8 Articles matching 'Little Boy' in related articles. |
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1. What Kind Of Dietary Needs Do Your Quests Have?
November 18, 2008
The summer sun is approaching fast, and what can mark the season better then a little backyard barbecue? At this time of year, the perfect summer party is on everybody’s mind, but, as with any other plan, problems can arise. There are, however, a few sure-fire ways to have a great time around the BBQ this summer. The key to having a great BBQ harkens back to the Boy Scout motto: be prepared. Anything can happen on a summer day or night. That’s just one reason a barbecue can be an exciting pastime. Having a successful event depends on planning for every contingency. What happens if it rains? Wh... (read more)
Author: Naveen Kulashri
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2. Salehoo How To Dropship
November 17, 2008
Salehoo Wholesale: Wholesale Ceramic Tile In Ohio
Salehoo: Wholesale Ceramic Tile In Ohio There are a lot of different people that join. There are a lot of people that sale on Ebay for big profits, while there are also people that join just to get the massive discounts on things that they want. You no longer have to pay the big retail price for that Xbox 360. You can get it wholesale. That is exactly what I did last Christmas for my little boy. Now, there are also people that own retail stores that use Salehoo. This is a great place to buy things cheaper than you ever thought possible. W... (read more)
Author: John Brenner
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3. What Kind Of Dietary Needs Do Your Quests Have?
November 17, 2008
The summer sun is approaching fast, and what can mark the season better then a little backyard barbecue? At this time of year, the perfect summer party is on everybody’s mind, but, as with any other plan, problems can arise. There are, however, a few sure-fire ways to have a great time around the BBQ this summer. The key to having a great BBQ harkens back to the Boy Scout motto: be prepared. Anything can happen on a summer day or night. That’s just one reason a barbecue can be an exciting pastime. Having a successful event depends on planning for every contingency. What happens if it rains? Wh... (read more)
Author: Balveer Jain
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4. Special Consideration for Parents of New Drivers
November 10, 2008
It is always a very scary time when your little baby boy or girl is ready to get out on the road. Children grow up really fast so it is never too early to learn what to expect when your child is ready to learn how to drive.
One of the first things to consider when your child is ready to learn to drive is enrolling them into a driving school. This option is in no way shirking the responsibility of teaching them to drive. In fact, it is more likely that your teenager will learn to drive well and safely from a professional driving instructor. The instructor not only has extensive training he... (read more)
Author: Julia Cleanthous
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5. Dressing Your Darling; Seven Steps to Simplifying Your Child's Wardrobe
November 10, 2008
Dressing yourself in the morning can be hard enough, but even more challenging when you have to worry about how to dress your little one too. Here are five simple tips to help solve your son or daughter’s wardrobe woes. 1. Pay attention to price. The first factor to remember when shopping for your little girl or boy is don’t break the bank! There are tons of adorable outfits available for under $50, and you won’t feel bad when she or he outgrows it six months from now. 2. Look for simplicity. Your daughter or son will love having easy-to-wear clothing. One piece outfits, like d... (read more)
Author: Emily McCormick
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6. Different Toys for Different Children - Choose the best Baby Gifts for Each Child
November 08, 2008
Have you ever noticed a baby or a little child playing? Babies look cute with innocence all over the face. They get so engrossed that nothing else matters to them. Have you noticed a boy generating a hilarious noise of a automobile working engine they give the girls a boost to an artistic stockpile where another group of children trying to play with other things like; toy rabbits and bears, then you comprehend the educational significance of toys, their utility influence. Toys engage in recreation which is more or less the utmost ingredient in baby’s maturity enhancing their psychological or i... (read more)
Author: Caroline Miller
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7. Forex Brotherhood Review
October 20, 2008
Let's kick this review off with a little overview of what Forex Brotherhood is all about. This bad boy gives you access to a private society of elite members / traders; you will be receiving two daily live broadcasts, two daily forex reports, (both AM and PM broadcasts and reports are saved for easy viewing and or download), monthly perks and prizes, forex videos, forex e-books active forums and live chats. Forex Brotherhood is a top software for the serious forex trader. This membership site is run by a Forex veteran man, Mr. Jason Alan Jankovsky. He has 20+ years experience under his belt... (read more)
Author: Tracy Lenyk
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8. Faith Hill Tickets- Definitely Not Over the Hill!
October 13, 2008
StubHub.com is your best source for Faith Hill tickets.Oh joy! Faith Hill just recently released her first ever Christmas album called Joy to the World. The album includes new versions of some classic hits like "Santa Claus is Coming to Town," "Little Drummer Boy," "Winter Wonderland" and "Holly Jolly Christmas." Hill also offers some new seasonal favorites on the record. Hill is the famous wife of famous country star Tim McGraw, the two often tour together and quite often she and her cowboy hat wearing husband are referred to as country music’s version of Brangelina.Hill’s soulful and gut... (read more)
Author: Alexa Trotta
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