El uranio-235 (235 U) es el único isótopo natural fisible, es decir, el único isótopo presente en la naturaleza con capacidad para provocar una reacción en cadena de fisión nuclear.Es una característica que ni siquiera el uranio-238, el más común de este elemento, posee.Fue descubierto en 1935 por Arthur Jeffrey Dempster.Presenta un período de semidesintegración …

World War II or the Second World War, often abbreviated as WWII or WW2, was a global war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposing military alliances: the Allies and the Axis powers.World War II was a total war that directly involved more than 100 million personnel from more than 30 …

Aviation is the activities surrounding mechanical flight and the aircraft industry. Aircraft includes fixed-wing and rotary-wing types, morphable wings, wing-less lifting bodies, as well as lighter-than-air craft such as hot air balloons and airships.. Aviation began in the 18th century with the development of the hot air balloon, an apparatus capable of atmospheric displacement through …

Wales (Welsh: Cymru ()) is a country that is part of the United Kingdom. It is bordered by England to the east, the Irish Sea to the north and west, the Celtic Sea to the south west and the Bristol Channel to the south. It had a population in 2021 of 3,107,500 and has a total area of 20,779 km 2 (8,023 sq mi). Wales has over 1,680 miles (2,700 km) of coastline and is largely mountainous …

Abū Jaʿfar Muḥammad ibn Jarīr ibn Yazīd al-Ṭabarī (Arabic: أبو جعفر محمد بن جرير بن يزيد الطبري), more commonly known as al-Ṭabarī (الطبري), was a Muslim historian and scholar from Amol, Tabaristan.Among the most prominent figures of the Islamic Golden Age, al-Tabari is known for his historical works and his expertise in Qur'anic exegesis (tafsir ...

The Boeing B-52 Stratofortress is an American long-range, subsonic, jet-powered strategic bomber.The B-52 was designed and built by Boeing, which has continued to provide support and upgrades.It has been operated by the United States Air Force (USAF) since the 1950s. The bomber is capable of carrying up to 70,000 pounds (32,000 kg) of weapons, and has a typical …

Uranium-235 (235 U or U-235) is an isotope of uranium making up about 0.72% of natural uranium.Unlike the predominant isotope uranium-238, it is fissile, i.e., it can sustain a nuclear chain reaction.It is the only fissile isotope that exists in nature as a primordial nuclide.. Uranium-235 has a half-life of 703.8 million years. It was discovered in 1935 by Arthur Jeffrey Dempster.

Because uranium-235 was known to be fissionable, it was the first material pursued in the approach to bomb development. As the first design developed (as well as the first deployed for combat), it is sometimes known as the Mark I. The vast majority of the work came in the form of the isotope enrichment of the uranium necessary for the weapon, since uranium-235 makes up …

El uranio es un elemento químico metálico de color plateado-grisáceo de la serie de los actínidos, su símbolo químico es U y su número atómico es 92.Por ello posee 92 protones y 92 electrones, con una valencia de 6. Su núcleo puede contener entre 140 y 146 neutrones, sus isótopos más abundantes son el 238 U que posee 146 neutrones y el 235 U con 143 neutrones.

Nach der Landtagswahl in Sachsen-Anhalt 2006 wurde die bis dahin regierende Koalition aus CDU und FDP durch eine von der CDU unter Ministerpräsident Wolfgang Böhmer geführte CDU-SPD-Koalition abgelöst.Der seit 2002 amtierende Ministerpräsident Böhmer kündigte bereits frühzeitig an, für eine weitere Legislaturperiode nicht mehr zur Verfügung zu stehen.

The F engine is a 3.9-liter, 75/93 kW (105/125 hp), carburated gasoline engine that is capable of 261/289 N·m (189/209 lb·ft) of torque at 2000 rpm; the difference in power and torque is different depending on the export destination.The original design was started in 1948 when Toyota begun to explore exporting their vehicles internationally.

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Punk rock (also known as simply punk) is a music genre that emerged in the mid-1970s. Rooted in 1960s garage rock, punk bands rejected the perceived excesses of mainstream 1970s rock.They typically produced short, fast-paced songs with hard-edged melodies and singing styles, stripped-down instrumentation, and often shouted political, anti-establishment lyrics.

The British Broadcasting Corporation Microcomputer System, or BBC Micro, is a series of microcomputers and associated peripherals designed and built by Acorn Computers in the 1980s for the BBC Computer Literacy Project. Designed with an emphasis on education, it was notable for its ruggedness, expandability, and the quality of its operating system.An accompanying …