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Not uranium 239, but uranium 235 and plutonium 239.

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16y ago

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What animals did the atomic bomb kill?

dunno so ask someone else like google answers


Has the Atomic bomb been replaced by something else since world war 2?

No, but now we have two types of atomic bombs: fission and fusion. The world war 2 bombs were only fission.


What was the force of the bomb that hit Hiroshima?

"Fat Man", the Atomic bomb that was dropped on August 6, 1945 upon the city of Hiroshima, Japan had a blast yield of 21 kilotons.


How much uranium was in the hiroshima atomic bomb?

Whilst the commonly cited figure at Wikipedia is 64 Kg (141 lbs), the actual figure is 56 kilograms of 80% enriched Uranium 235, as cited in "The Last Mission, The Secret History of World War Two's Final Mission," published 2002 by Jim Smith and Malcolm McConnell giving the story of B-29 missions in the final days of WW2. In contrast with: http://en.wikipedia.org/wiki/Little_boy The Quantity used was to ensure achieving natural critical mass, which falls in a range from 52 kilograms to 64 kilograms. Various factors affect what determines natural critical mass such as: Warhead temperature (cooler the better) Density of fissile material Geometry of the Warhead (spherical is smallest mass) Isotope Purity Neutron Flux & Uniformity Use of Reflectors (ie containment of stray neutrons) Of the 56 kilogram warhead of Little Boy which exploded over Hiroshima, only 780 grams or so exploded at the very heart of the Uranium sphere, or about 1-2% of the mass. That is because Neutron flux only attained criticality at the very heart of the sphere and not at the extremities where the Uranium 235 was wasted. When you increase efficiency of the Neutron Flux you require less fissile material. This is the key to shrinking a nuclear warhead. In terms of the Hiroshima bomb however, 640 kilograms of un-enriched Uranium Oxide needed to be enriched to 80% 235U for a single weapon. Uranium 235 is almost never used for nuclear weapons now. Pakistan still uses Uranium for it's warheads. Almost everywhere else now Plutonium is favoured for it's fail safe features. Plutonium is harvested in a nuclear reactor by the radioactive bombardment of fuel which is enriched to 20% Uranium 235. The remaining Uranium 238 is converted to Neptunium 239 and then decays to Plutonium 239. The Plutonium is harvested by chemical separation from nuclear waste. Only about 40 kilograms of un-enriched Uranium Oxide is required to obtain enough Plutonium via a heavy water nuclear reactor for a Plutonium weapon.


Why wasn't the atomic bomb test of white sands tested somewhere else?

It was the most remote place in the U.S. closest to D.C. It was a top secret project the U.s. didn't tell its allies.

Related Questions

Where else other than Hiroshima was the atomic bomb dropped?

So far in human history only Hiroshima and Nagasaki were ever bombed by a atom bomb.


Could farts be collected to make a methane bomb?

yeah, how else do you think they made the atomic bomb


Did albert Einstein discover atomic bomb?

No. Nor did anyone else. Atomic bombs are an invention not a discovery.


Why did the US use the atomic bomb only on Japan and not on anyone else?

Germany had surrendered before the bomb was operational.


Why was the US able to develop an atomic bomb before anyone else?

We had the machinery and minds able to do what some primitive countries probably did not have at the time to develop the atomic bomb. Also we had resources capable of making such a weapon that other countries didn't.


Why did the us make an atomic bomb?

They made it to blow stuff up why else


He dromped the atomic bomb on japan?

your'e not serious are you? america. who else would?


What else was going on in the world at the making of the atomic bomb?

World War 2


What animals did the atomic bomb kill?

dunno so ask someone else like google answers


Was the problem important enough for the atomic bomb?

The atomic bomb was developed on the basis of "if we don't do it, someone else will and they'll use it against us". In this respect, its developers were partially correct - other nations did develop the A-bomb soon afterward - but novody has since proved either unintelligent or desperate enough to use one (aside from the Nagasaki and Hiroshima bombings).


What tragedy occured during world war 2?

alot. pearl harbor. atomic bomb. plenty else


What is the proton number for Uranium-235?

92, the proton number is also called the atomic number if you need to look up something else