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Rhydymwyn F
Rhydymwyn (the name in Welsh means 'Ford of the Ore' and takes its placename from the ford across the River Alyn now replaced by a small iron bridge) is a village in Flintshire, Wales, located in the upper Alyn valley. Once a district of Mold, it was recognised as a separate parish from 1865. It is now part of the community of Cilcain. Geography The geology of the area consists of a layer of extremely pure, and hence structurally sound, thick layer of limestone at depths ranging from surface to . The limestone holds other minerals, including nickel and copper deposits, making it an ideal site for mining. History Due to the industrialisation of nearby Northwest England, and its needs for mineral supplies, the mineral deposits in the Alyn valley created a population explosion in various villages, including Rhydymwyn. From the mid-18th century, Rhydymwyn was the site for a range of industries, which included foundries, waterwheels as well as mine workings. The new parish of Rhydy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Delyn (Assembly Constituency)
Delyn is a constituency of the Senedd. It elects one Member of the Senedd by the first past the post method of election. Also, however, it is one of nine constituencies in the North Wales electoral region, which elects four additional members, in addition to nine constituency members, to produce a degree of proportional representation for the region as a whole. Boundaries The constituency was created for the first election to the Assembly, in 1999, with the name and boundaries of the Delyn Westminster constituency. It is entirely within the preserved county of Clwyd. As created in 1999, the North Wales region included the constituencies of Alyn and Deeside, Caernarfon, Clwyd West, Clwyd South, Conwy, Delyn, Vale of Clwyd, Wrexham and Ynys Môn. For the 2007 election the region included Aberconwy, Alyn and Deeside, Arfon, Clwyd South, Clwyd West, Delyn, Vale of Clwyd, Wrexham and Ynys Môn. Voting In elections for the Senedd, each voter has two votes. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mining
Mining is the extraction of valuable minerals or other geological materials from the Earth, usually from an ore body, lode, vein, seam, reef, or placer deposit. The exploitation of these deposits for raw material is based on the economic viability of investing in the equipment, labor, and energy required to extract, refine and transport the materials found at the mine to manufacturers who can use the material. Ores recovered by mining include metals, coal, oil shale, gemstones, limestone, chalk, dimension stone, rock salt, potash, gravel, and clay. Mining is required to obtain most materials that cannot be grown through agricultural processes, or feasibly created artificially in a laboratory or factory. Mining in a wider sense includes extraction of any non-renewable resource such as petroleum, natural gas, or even water. Modern mining processes involve prospecting for ore bodies, analysis of the profit potential of a proposed mine, extraction of the desired materials, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dee Estuary
The Dee Estuary ( cy, Aber Dyfrdwy) is a large estuary by means of which the River Dee flows into Liverpool Bay. The estuary starts near Shotton after a five-mile (8 km) 'canalised' section and the river soon swells to be several miles wide forming the boundary between the Wirral Peninsula in north-west England and Flintshire in north-east Wales. The Dee Estuary's largest towns along it include Hollywell, Flint, Connah's Quay, Shotton, Queensferry, Saltney Ferry, Chester (City), Heswall, West Kirby and Neston as well as other villages and towns alongside it. The A548 also passes along the estuary in Wales and parts of Cheshire West and Chester and Merseyside in England. The North Wales Coast Line follows the course of the Dee Estuary between Prestatyn and Chester. Geology The estuary is unusual in that comparatively little water occupies so large a basin. One theory is that larger rivers such as the Severn and/or Mersey once flowed into the Dee. The current view is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
A541 Road
The A541 is an A road in North Wales. The road starts on the A525 in Trefnant, between St Asaph and Denbigh, and ends in Wrexham. On the way, it passes the town of Mold A mold () or mould () is one of the structures certain fungi can form. The dust-like, colored appearance of molds is due to the formation of spores containing fungal secondary metabolites. The spores are the dispersal units of the fungi. Not .... It also passes through many villages. In northern-central Wrexham it joins the B5101 road. The section of the road between Mold and Denbigh, centred on Rhydymwyn, was described by North Wales Police as the most dangerous road in North Wales. References Roads in Wrexham County Borough Roads in Flintshire Roads in Denbighshire {{Wales-road-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Denbigh And Mold Junction Railway
The Mold and Denbigh Junction Railway was a railway company that built a railway line in North Wales. It formed a link between the Mold Railway (from Chester) and the Vale of Clwyd Railway towards Rhyl. The line opened in 1869. Serving a largely rural district, it never attracted much business, and the passenger service was withdrawn in 1962. Ordinary goods traffic ceased not long after, and the line closed completely in 1983. Conception The Chester and Holyhead Railway was opened throughout in 1850,Peter E Baughan, ''A Regional History of the Railways of Great Britain: 14: North and Mid Wales'', David St John Thomas, Nairn, 1991, , pages 22 and 24 and it was absorbed by the London and North Western Railway in 1858. The Great Western Railway was the principal competitor of the LNWR in the area, and the GWR had taken steps to reach Rhyl, an important regional centre. It hoped to do this by taking control of a series of local railways, northwards from the Vale of Llangollen Railw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quebec Agreement
The Quebec Agreement was a secret agreement between the United Kingdom and the United States outlining the terms for the coordinated development of the science and engineering related to nuclear energy and specifically nuclear weapons. It was signed by Winston Churchill and Franklin D. Roosevelt on 19 August 1943, during World War II, at the First Quebec Conference in Quebec City, Quebec, Canada. The Quebec Agreement stipulated that the US and UK would pool their resources to develop nuclear weapons, and that neither country would use them against the other, or against other countries without mutual consent, or pass information about them to other countries. It also gave the United States a veto over post-war British commercial or industrial uses of nuclear energy. The agreement merged the British Tube Alloys project with the American Manhattan Project, and created the Combined Policy Committee to control the joint project. Although Canada was not a signatory, the Agreement ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atomic Bomb
A nuclear weapon is an explosive device that derives its destructive force from nuclear reactions, either fission (fission bomb) or a combination of fission and fusion reactions (thermonuclear bomb), producing a nuclear explosion. Both bomb types release large quantities of energy from relatively small amounts of matter. The first test of a fission ("atomic") bomb released an amount of energy approximately equal to . The first thermonuclear ("hydrogen") bomb test released energy approximately equal to . Nuclear bombs have had yields between 10 tons TNT (the W54) and 50 megatons for the Tsar Bomba (see TNT equivalent). A thermonuclear weapon weighing as little as can release energy equal to more than . A nuclear device no larger than a conventional bomb can devastate an entire city by blast, fire, and radiation. Since they are weapons of mass destruction, the proliferation of nuclear weapons is a focus of international relations policy. Nuclear weapons have been deployed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tube Alloys
Tube Alloys was the research and development programme authorised by the United Kingdom, with participation from Canada, to develop nuclear weapons during the Second World War. Starting before the Manhattan Project in the United States, the British efforts were kept classified, and as such had to be referred to by code even within the highest circles of government. The possibility of nuclear weapons was acknowledged early in the war. At the University of Birmingham, Rudolf Peierls and Otto Robert Frisch co-wrote a memorandum explaining that a small mass of pure uranium-235 could be used to produce a chain reaction in a bomb with the power of thousands of tons of TNT. This led to the formation of the MAUD Committee, which called for an all-out effort to develop nuclear weapons. Wallace Akers, who oversaw the project, chose the deliberately misleading code name "Tube Alloys". His Tube Alloys Directorate was part of the Department of Scientific and Industrial Research. The Tube ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uranium-235
Uranium-235 (235U 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. Its fission cross section for slow thermal neutrons is about 584.3±1 barns. For fast neutrons it is on the order of 1 barn. Most but not all neutron absorptions result in fission; a minority result in neutron capture forming uranium-236. Natural decay chain :\begin \ce \begin \ce \\ \ce \end \ce \\ \ce \begin \ce \\ \ce \end \ce \end Fission properties The fission of one atom of uranium-235 releases () inside the reactor. That corresponds to 19.54 TJ/ mol, or 83.14 TJ/kg. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mustard Gas
Mustard gas or sulfur mustard is a chemical compound belonging to a family of cytotoxic and blister agents known as mustard agents. The name ''mustard gas'' is technically incorrect: the substance, when dispersed, is often not actually a gas, but is instead in the form of a fine mist of liquid droplets.https://www.acs.org/content/dam/acsorg/education/resources/highschool/chemmatters/gc-mustard-gas-personal-safety-and-natl-security.pdf Mustard gases form blisters on exposed skin and in the lungs, often resulting in prolonged illness ending in death. The active ingredient in typical mustard gas is the organosulfur compound bis(2-chloroethyl) sulfide. In the wider sense, compounds with the structural element are known as ''sulfur mustards'' and ''nitrogen mustards'', respectively. Such compounds are potent alkylating agents, which can interfere with several biological processes. History as chemical weapons As a chemical weapon, mustard gas was first used in World War I, and has ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhydymwyn Parish Church
Rhydymwyn (the name in Welsh means 'Ford of the Ore' and takes its placename from the ford across the River Alyn now replaced by a small iron bridge) is a village in Flintshire, Wales, located in the upper Alyn valley. Once a district of Mold, it was recognised as a separate parish from 1865. It is now part of the community of Cilcain. Geography The geology of the area consists of a layer of extremely pure, and hence structurally sound, thick layer of limestone at depths ranging from surface to . The limestone holds other minerals, including nickel and copper deposits, making it an ideal site for mining. History Due to the industrialisation of nearby Northwest England, and its needs for mineral supplies, the mineral deposits in the Alyn valley created a population explosion in various villages, including Rhydymwyn. From the mid-18th century, Rhydymwyn was the site for a range of industries, which included foundries, waterwheels as well as mine workings. The new parish of Rhydy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Waterwheel
A water wheel is a machine for converting the energy of flowing or falling water into useful forms of power, often in a watermill. A water wheel consists of a wheel (usually constructed from wood or metal), with a number of blades or buckets arranged on the outside rim forming the driving car. Water wheels were still in commercial use well into the 20th century but they are no longer in common use. Uses included milling flour in gristmills, grinding wood into pulp for papermaking, hammering wrought iron, machining, ore crushing and pounding fibre for use in the manufacture of cloth. Some water wheels are fed by water from a mill pond, which is formed when a flowing stream is dammed. A channel for the water flowing to or from a water wheel is called a mill race. The race bringing water from the mill pond to the water wheel is a headrace; the one carrying water after it has left the wheel is commonly referred to as a tailrace. Waterwheels were used for various purposes from ag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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