1.
Telephone exchange
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A telephone exchange is a telecommunications system used in the public switched telephone network or in large enterprises. In historical perspective, telecommunication terms have been used with different semantics over time, the term telephone exchange is often used synonymously with central office, a Bell System term. Often, an office is defined as a building used to house the inside plant equipment of potentially several telephone exchanges. Such an area has also referred to as the exchange. Central office locations may also be identified in North America as wire centers, All central offices within a larger region, typically aggregated by state, were assigned a common numbering plan area code. For corporate or enterprise use, a telephone exchange is often referred to as a private branch exchange. Smaller installations might deploy a PBX or key telephone system in the office of a receptionist and this made it possible for subscribers to call each other at homes, businesses, or public spaces. These made telephony an available and comfortable communication tool for everyday use, one of the first to propose a telephone exchange was Hungarian Tivadar Puskás in 1877 while he was working for Thomas Edison. The first experimental telephone exchange was based on the ideas of Puskás, the worlds first commercial telephone exchange opened on November 12,1877 in Friedrichsberg close to Berlin. George W. Coy designed and built the first commercial US telephone exchange opened in New Haven. The switchboard was built from carriage bolts, handles from teapot lids and bustle wire, Charles Glidden is also credited with establishing an exchange in Lowell, MA. with 50 subscribers in 1878. In Europe other early telephone exchanges were based in London and Manchester, Belgium had its first International Bell exchange a year later. In 1887 Puskás introduced the multiplex switchboard, later exchanges consisted of one to several hundred plug boards staffed by switchboard operators. Each operator sat in front of a panel containing banks of ¼-inch tip-ring-sleeve jacks. In front of the jack panel lay a horizontal panel containing two rows of patch cords, each connected to a cord circuit. When a calling party lifted the receiver, the loop current lit a signal lamp near the jack. The operator responded by inserting the rear cord into the jack and switched her headset into the circuit to ask, Number. For a local call, the operator inserted the front cord of the pair into the partys local jack
2.
Birmingham
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Birmingham is a major city and metropolitan borough of West Midlands, England lying on the River Rea, a small river that runs through Birmingham. It is the largest and most populous British city outside London, the city is in the West Midlands Built-up Area, the third most populous urban area in the United Kingdom, with a population of 2,440,986 at the 2011 census. Birminghams metropolitan area is the second most populous in the UK with a population of 3.8 million and this also makes Birmingham the 8th most populous metropolitan area in Europe. By 1791 it was being hailed as the first manufacturing town in the world, perhaps the most important invention in British history, the industrial steam engine, was invented in Birmingham. From the summer of 1940 to the spring of 1943, Birmingham was bombed heavily by the German Luftwaffe in what is known as the Birmingham Blitz. The damage done to the infrastructure, in addition to a deliberate policy of demolition and new building by planners, led to extensive demolition. Today Birminghams economy is dominated by the service sector and its metropolitan economy is the second largest in the United Kingdom with a GDP of $121. 1bn, and its six universities make it the largest centre of higher education in the country outside London. Birmingham is the fourth-most visited city in the UK by foreign visitors, Birminghams sporting heritage can be felt worldwide, with the concept of the Football League and lawn tennis both originating from the city. Its most successful football club Aston Villa has won seven league titles, people from Birmingham are called Brummies, a term derived from the citys nickname of Brum. This originates from the citys name, Brummagem, which may in turn have been derived from one of the citys earlier names. There is a distinctive Brummie accent and dialect, Birminghams early history is that of a remote and marginal area. The main centres of population, power and wealth in the pre-industrial English Midlands lay in the fertile and accessible river valleys of the Trent, the Severn and the Avon. The area of modern Birmingham lay in between, on the upland Birmingham Plateau and within the wooded and sparsely populated Forest of Arden. Birmingham as a settlement dates from the Anglo-Saxon era, within a century of the charter Birmingham had grown into a prosperous urban centre of merchants and craftsmen. By 1327 it was the third-largest town in Warwickshire, a position it would retain for the next 200 years, by 1700 Birminghams population had increased fifteenfold and the town was the fifth-largest in England and Wales. The importance of the manufacture of goods to Birminghams economy was recognised as early as 1538. Equally significant was the emerging role as a centre for the iron merchants who organised finance, supplied raw materials. The 18th century saw this tradition of free-thinking and collaboration blossom into the phenomenon now known as the Midlands Enlightenment
3.
England
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England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west, the Irish Sea lies northwest of England and the Celtic Sea lies to the southwest. England is separated from continental Europe by the North Sea to the east, the country covers five-eighths of the island of Great Britain in its centre and south, and includes over 100 smaller islands such as the Isles of Scilly, and the Isle of Wight. England became a state in the 10th century, and since the Age of Discovery. The Industrial Revolution began in 18th-century England, transforming its society into the worlds first industrialised nation, Englands terrain mostly comprises low hills and plains, especially in central and southern England. However, there are uplands in the north and in the southwest, the capital is London, which is the largest metropolitan area in both the United Kingdom and the European Union. In 1801, Great Britain was united with the Kingdom of Ireland through another Act of Union to become the United Kingdom of Great Britain and Ireland. In 1922 the Irish Free State seceded from the United Kingdom, leading to the latter being renamed the United Kingdom of Great Britain, the name England is derived from the Old English name Englaland, which means land of the Angles. The Angles were one of the Germanic tribes that settled in Great Britain during the Early Middle Ages, the Angles came from the Angeln peninsula in the Bay of Kiel area of the Baltic Sea. The earliest recorded use of the term, as Engla londe, is in the ninth century translation into Old English of Bedes Ecclesiastical History of the English People. According to the Oxford English Dictionary, its spelling was first used in 1538. The earliest attested reference to the Angles occurs in the 1st-century work by Tacitus, Germania, the etymology of the tribal name itself is disputed by scholars, it has been suggested that it derives from the shape of the Angeln peninsula, an angular shape. An alternative name for England is Albion, the name Albion originally referred to the entire island of Great Britain. The nominally earliest record of the name appears in the Aristotelian Corpus, specifically the 4th century BC De Mundo, in it are two very large islands called Britannia, these are Albion and Ierne. But modern scholarly consensus ascribes De Mundo not to Aristotle but to Pseudo-Aristotle, the word Albion or insula Albionum has two possible origins. Albion is now applied to England in a poetic capacity. Another romantic name for England is Loegria, related to the Welsh word for England, Lloegr, the earliest known evidence of human presence in the area now known as England was that of Homo antecessor, dating to approximately 780,000 years ago. The oldest proto-human bones discovered in England date from 500,000 years ago, Modern humans are known to have inhabited the area during the Upper Paleolithic period, though permanent settlements were only established within the last 6,000 years
4.
Jewellery Quarter
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The Jewellery Quarter is an area of Birmingham, England. Situated in the south of the Hockley area of the city centre, there is a population of around 3,000 people in a 1. 07-square-kilometre area. The Jewellery Quarter is Europes largest concentration of businesses involved in the jewellery trade and it is also home to the worlds largest Assay Office, which hallmarks around 12 million items a year. Historically the Jewellery Quarter has been the birthplace of many pioneering advancements in industrial technology, at its peak in the early 1900s the Jewellery Quarter employed over 30,000 people, however due to foreign competition and lack of demand, the industry declined throughout the 20th century. The area is now being transformed into a village and hub for creative businesses. Its historical importance has led to numerous conservation schemes and it is an Anchor Point of the European Route of Industrial Heritage, a survey of 1553 named one of the first goldsmiths of Birmingham, Roger Pemberton. During the 18th and 19th centuries, Birmingham prospered from the Industrial Revolution and developed into an industrial town, manufacturing a vast range of products. Many large foundries and glassworks attracted workers from all areas of Britain, a considerable trade developed in the manufacture of gilt buttons, cap badges, pins and small metal toys. According to the Birmingham Directory of 1780, there were 26 jewellers at the time, because the definition of a jeweller was not explained in the directory, it is thought that it may contain many irregularities and the number of actual jewellers may be lower. It is thought that by the start of the 19th century, there were around 12 jewellery manufacturing companies, in 1746, the Colmore family released land on what is known as the Jewellery Quarter today to help satisfy the demands of an increasing population. The largest tract of land was Newhall which had purchased from the Manor of Birmingham by William Colmore. In 1560, it was described as a warren and by 1620. The large manor house gave its name to the area, by 1746, the Colmore family had moved out and let the manor to tenants. Beyond this, there were enclosed fields leading to Birmingham Heath, sandpits were located on Hockley Hill and the product of these pits was used for moulds which were used in the local metal casting industry. The area was crossed by three roads, the road from Wednesbury and Wolverhampton, which now consists of Constitution Hill, Great Hampton Street and Hockley Hill, was turnpiked in 1727. This was followed by the turnpiking of the road to Dudley, consisting of Summer Row, Parade and Summer Hill Road, both roads were heavily used by traders and carriages transporting raw materials from Staffordshire into Birmingham. The completion of the Birmingham Canal in 1769 led to the improvement of these roads, Warstone Lane, now Warstone Lane, Hall Street and part of Icknield Street, connected the Wolverhampton road to the Dudley road. Ladywood Road, which is now Ladywood Middleway, was connected to the area as a result of Warstone Lane
5.
Worcester
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Worcester is a city in Worcestershire, England,31 miles southwest of Birmingham and 27 miles north of Gloucester. The River Severn flanks the western side of the city centre, the Battle of Worcester was the final battle of the English Civil War, where Oliver Cromwells New Model Army defeated King Charles Is Cavaliers. Worcester is known as the home of Royal Worcester Porcelain, composer Edward Elgar, Lea & Perrins, makers of traditional Worcestershire sauce, the trade route past Worcester which later formed part of the Roman Ryknild Street dates to Neolithic times. The position commanded a ford over the River Severn and was fortified by the Britons around 400 BC and it would have been on the northern border of the Dobunni and probably subject to the larger communities of the Malvern hillforts. It may have been the Vertis mentioned in the 7th-century Ravenna Cosmography, using charcoal from the Forest of Dean, the Romans operated pottery kilns and ironworks at the site and may have built a small fort. In the 3rd century, Roman Worcester occupied an area than the subsequent medieval city. Industrial production ceased and the settlement contracted to a position along the lines of the old British fort at the river terraces southern end. This settlement is identified with the Cair Guiragon listed among the 28 cities of Britain by the History of the Britons attributed to Nennius. This is not a British name but an adaption of its Old English name Weorgoran ceaster, the Weorgoran were precursors of Hwicce and probably West Saxons who entered the area some time after the 577 Battle of Dyrham. The oldest known church was St Helens, which was certainly British, the town was almost destroyed in 1041 after a rebellion against the punitive taxation of Harthacanute. During this time, the relocated to the nearby Bevere Island,2 miles upriver. The following century, the town was attacked several times during The Anarchy, by late medieval times the population had grown to around 10,000 as the manufacture of cloth started to become a large local industry. The town was designated a county corporate, giving it autonomy from local government. Worcester was the site of the Battle of Worcester, when Charles II attempted to regain the crown, in the fields a little to the west and south of the city. Worcester had supported the Parliamentary cause before the outbreak of war in 1642 but spent most of the war under Royalist occupation. After the war it used its location as the site of the final battles of the First Civil War. As part of this and not based upon any historical fact, it invented the epithet Fidelis Civitas, in 1670, the River Severn broke its banks and the subsequent flood was the worst ever seen by Worcester. The closest flood height to what is known as The Flood of 1670 was when the Severn flooded in the rains of July 2007
6.
Wolverhampton
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Wolverhampton is a city and metropolitan borough in the West Midlands, England. At the 2011 census, it had a population of 249,470, the demonym for people from the city is Wulfrunian. Historically part of Staffordshire, the city is named after Wulfrun, prior to the Norman Conquest, the areas name appears only as variants of Heantune or Hamtun, the prefix Wulfrun or similar appearing in 1070 and thereafter. Alternatively, the city may have earned its name from Wulfereēantūn after the Mercian King. The variation Wolveren Hampton is seen in records, e. g. in 1381. The city grew initially as a market town specialising in the woollen trade, in the Industrial Revolution, it became a major centre for coal mining, steel production, lock making and the manufacture of cars and motorcycles. The economy of the city is based on engineering, including a large aerospace industry. A local tradition states that King Wulfhere of Mercia founded an abbey of St Mary at Wolverhampton in 659, the Mercians and West Saxons claimed a decisive victory and the field of Woden is recognised by numerous place names in Wednesfield. In 985, King Ethelred the Unready granted lands at a place referred to as Heantun to Lady Wulfrun by royal charter and this became the site for the current St. Peters Church. A statue of Lady Wulfrun, sculpted by Sir Charles Wheeler, Wolverhampton is recorded in the Domesday Book in 1086 as being in the Hundred of Seisdon and the county of Staffordshire. The lords of the manor are listed as the canons of St Mary, with the tenant-in-chief being Samson, Wolverhampton at this date is a large settlement of fifty households. In 1179, there is mention of a market held in the town and this charter for a weekly market held on a Wednesday was eventually granted on 4 February 1258 by Henry III. From the 16th century onwards, Wolverhampton became home to a number of industries including lock and key making and iron. Wolverhampton suffered two Great Fires, the first in April 1590, and the second in September 1696, both fires started in todays Salop Street. The first fire lasted for five days and left nearly 700 people homeless and this second fire led to the purchase of the first fire engine within the city in September 1703. There is also evidence that Wolverhampton may have been the location of the first working Newcomen Steam Engine in 1712. In Victorian times, Wolverhampton grew to be a town mainly due to the huge amount of industry that occurred as a result of the abundance of coal. The remains of this wealth can be seen in houses such as Wightwick Manor and The Mount
7.
Asbestos
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They are commonly known by their colors, as blue asbestos, brown asbestos, white asbestos, and green asbestos. It was used in applications as electrical insulation for hotplate wiring. When asbestos is used for its resistance to fire or heat and these desirable properties made asbestos very widely used. Prolonged inhalation of asbestos fibers can cause serious and fatal illnesses including cancer, mesothelioma. Concern of asbestos-related illness in modern times began in the 20th century, by the 1980s and 1990s, asbestos trade and use were heavily restricted, phased out, or banned outright in an increasing number of countries. S. History and a much lesser legal issue in most other countries involved, asbestos-related liability also remains an ongoing concern for many manufacturers, insurers and reinsurers. Asbestos derives from the ancient Greek ἄσβεστος, meaning unquenchable or inextinguishable, the word is pronounced /æsˈbɛstəs/, /æzˈbɛstəs/ or /æzˈbɛstɒs/. Six mineral types are defined by the United States Environmental Protection Agency as asbestos including those belonging to the serpentine class, all six asbestos mineral types are known to be human carcinogens. The visible fibers are themselves composed of millions of microscopic fibrils that can be released by abrasion. Chrysotile is the member of the serpentine class. 12001-29-5, is obtained from rocks which are common throughout the world. Its idealized chemical formula is Mg34, chrysotile appears under the microscope as a white fiber. Chrysotile has been used more than any type and accounts for about 95% of the asbestos found in buildings in America. Chrysotile is more flexible than amphibole types of asbestos, and can be spun, the most common use was corrugated asbestos cement roofing primarily for outbuildings, warehouses and garages. It may also be found in sheets or panels used for ceilings and sometimes for walls, chrysotile has been a component in joint compound and some plasters. Amosite, crocidolite, tremolite, anthophyllite and actinolite are members of the amphibole class, one formula given for amosite is Fe7Si8O222. Amosite is seen under a microscope as a grey-white vitreous fiber and it is found most frequently as a fire retardant in thermal insulation products, asbestos insulating board and ceiling tiles. 12001-28-4, is the form of the amphibole riebeckite, found primarily in southern Africa
8.
Anchor
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An anchor is a device, normally made of metal, used to connect a vessel to the bed of a body of water to prevent the craft from drifting due to wind or current. The word derives from Latin ancora, which comes from the Greek ἄγκυρα. Anchors can either be temporary or permanent, permanent anchors are used in the creation of a mooring, and are rarely moved, a specialist service is normally needed to move or maintain them. Vessels carry one or more anchors, which may be of different designs. A sea anchor is a drogue, not in contact with the seabed, used to control a drifting vessel, anchors achieve holding power either by hooking into the seabed, or via sheer mass, or a combination of the two. Permanent moorings use large masses resting on the seabed, semi-permanent mooring anchors and large ships anchors derive a significant portion of their holding power from their mass, while also hooking or embedding in the bottom. Modern anchors for smaller vessels have metal flukes which hook on to rocks on the bottom or bury themselves in soft seabed, the vessel is attached to the anchor by the rode, which is made of chain, cable, rope, or a combination of these. A10,1 scope gives the greatest holding power, Anchoring with sufficient scope and/or heavy chain rode brings the direction of strain close to parallel with the seabed. If necessary, motoring slowly around the location of the anchor also helps dislodge it, anchors are sometimes fitted with a tripping line attached to the crown, by which they can be unhooked from rocks or coral. The term aweigh describes an anchor when it is hanging on the rope and is not resting on the bottom and this is linked to the term to weigh anchor, meaning to lift the anchor from the sea bed, allowing the ship or boat to move. An anchor is described as aweigh when it has broken out of the bottom and is being hauled up to be stowed. Aweigh should not be confused with under way, which describes a vessel which is not moored to a dock or anchored, the earliest anchors were probably rocks, and many rock anchors have been found dating from at least the Bronze Age. Pre-European Maori waka used one or more hollowed stones, tied with flax ropes, many modern moorings still rely on a large rock as the primary element of their design. However, using pure mass to resist the forces of a storm only works well as a permanent mooring, the ancient Greeks used baskets of stones, large sacks filled with sand, and wooden logs filled with lead. According to Apollonius Rhodius and Stephen of Byzantium, anchors were formed of stone, such anchors held the vessel merely by their weight and by their friction along the bottom. Iron was afterwards introduced for the construction of anchors, and an improvement was made by forming them with teeth, or flukes, the Admiralty Pattern, A. P. or simply Admiralty, and also known as Fisherman, is the anchor shape most familiar to non-sailors. It consists of a shank with a ring or shackle for attaching the rode. At the other end of the shank there are two arms, carrying the flukes, while the stock is mounted to the other end, when the anchor lands on the bottom, it will generally fall over with the arms parallel to the seabed
9.
London
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London /ˈlʌndən/ is the capital and most populous city of England and the United Kingdom. Standing on the River Thames in the south east of the island of Great Britain and it was founded by the Romans, who named it Londinium. Londons ancient core, the City of London, largely retains its 1. 12-square-mile medieval boundaries. London is a global city in the arts, commerce, education, entertainment, fashion, finance, healthcare, media, professional services, research and development, tourism. It is crowned as the worlds largest financial centre and has the fifth- or sixth-largest metropolitan area GDP in the world, London is a world cultural capital. It is the worlds most-visited city as measured by international arrivals and has the worlds largest city airport system measured by passenger traffic, London is the worlds leading investment destination, hosting more international retailers and ultra high-net-worth individuals than any other city. Londons universities form the largest concentration of education institutes in Europe. In 2012, London became the first city to have hosted the modern Summer Olympic Games three times, London has a diverse range of people and cultures, and more than 300 languages are spoken in the region. Its estimated mid-2015 municipal population was 8,673,713, the largest of any city in the European Union, Londons urban area is the second most populous in the EU, after Paris, with 9,787,426 inhabitants at the 2011 census. The citys metropolitan area is the most populous in the EU with 13,879,757 inhabitants, the city-region therefore has a similar land area and population to that of the New York metropolitan area. London was the worlds most populous city from around 1831 to 1925, Other famous landmarks include Buckingham Palace, the London Eye, Piccadilly Circus, St Pauls Cathedral, Tower Bridge, Trafalgar Square, and The Shard. The London Underground is the oldest underground railway network in the world, the etymology of London is uncertain. It is an ancient name, found in sources from the 2nd century and it is recorded c.121 as Londinium, which points to Romano-British origin, and hand-written Roman tablets recovered in the city originating from AD 65/70-80 include the word Londinio. The earliest attempted explanation, now disregarded, is attributed to Geoffrey of Monmouth in Historia Regum Britanniae and this had it that the name originated from a supposed King Lud, who had allegedly taken over the city and named it Kaerlud. From 1898, it was accepted that the name was of Celtic origin and meant place belonging to a man called *Londinos. The ultimate difficulty lies in reconciling the Latin form Londinium with the modern Welsh Llundain, which should demand a form *lōndinion, from earlier *loundiniom. The possibility cannot be ruled out that the Welsh name was borrowed back in from English at a later date, and thus cannot be used as a basis from which to reconstruct the original name. Until 1889, the name London officially applied only to the City of London, two recent discoveries indicate probable very early settlements near the Thames in the London area
10.
Manchester
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Manchester is a major city and metropolitan borough in Greater Manchester, England, with a population of 514,414 as of 2013. It lies within the United Kingdoms second-most populous urban area, with a population of 2.55 million, Manchester is fringed by the Cheshire Plain to the south, the Pennines to the north and east and an arc of towns with which it forms a continuous conurbation. The local authority is Manchester City Council and it was historically a part of Lancashire, although areas of Cheshire south of the River Mersey were incorporated during the 20th century. Throughout the Middle Ages Manchester remained a township but began to expand at an astonishing rate around the turn of the 19th century. Manchesters unplanned urbanisation was brought on by a boom in textile manufacture during the Industrial Revolution, Manchester achieved city status in 1853. The Manchester Ship Canal opened in 1894, creating the Port of Manchester and its fortunes declined after the Second World War, owing to deindustrialisation. The city centre was devastated in a bombing in 1996, but it led to extensive investment, in 2014, the Globalization and World Cities Research Network ranked Manchester as a beta world city, the highest-ranked British city apart from London. Manchester is the third-most visited city in the UK and it is notable for its architecture, culture, musical exports, media links, scientific and engineering output, social impact, sports clubs and transport connections. Manchester Liverpool Road railway station was the worlds first inter-city passenger railway station and in the city scientists first split the atom, the name Manchester originates from the Latin name Mamucium or its variant Mancunium and the citizens are still referred to as Mancunians. These are generally thought to represent a Latinisation of an original Brittonic name, both meanings are preserved in languages derived from Common Brittonic, mam meaning breast in Irish and mother in Welsh. The suffix -chester is a survival of Old English ceaster and their territory extended across the fertile lowland of what is now Salford and Stretford. Central Manchester has been settled since this time. A stabilised fragment of foundations of the version of the Roman fort is visible in Castlefield. After the Roman withdrawal and Saxon conquest, the focus of settlement shifted to the confluence of the Irwell, much of the wider area was laid waste in the subsequent Harrying of the North. Thomas de la Warre, lord of the manor, founded and constructed a church for the parish in 1421. The church is now Manchester Cathedral, the premises of the college house Chethams School of Music. The library, which opened in 1653 and is open to the public today, is the oldest free public reference library in the United Kingdom. Manchester is mentioned as having a market in 1282, around the 14th century, Manchester received an influx of Flemish weavers, sometimes credited as the foundation of the regions textile industry
11.
Nuclear weapon
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A nuclear weapon is an explosive device that derives its destructive force from nuclear reactions, either fission or a combination of fission and fusion. Both reactions release vast quantities of energy from small amounts of matter. The first test of a bomb released the same amount of energy as approximately 20,000 tons of TNT. The first thermonuclear bomb test released the same amount of energy as approximately 10 million tons of TNT, a thermonuclear weapon weighing little more than 2,400 pounds can produce an explosive force comparable to the detonation of more than 1.2 million tons of TNT. A nuclear device no larger than traditional bombs can devastate a city by blast, fire. Nuclear weapons are considered weapons of destruction, and their use. Nuclear weapons have been used twice in nuclear warfare, both times by the United States against Japan near the end of World War II, the bombings resulted in the deaths of approximately 200,000 civilians and military personnel from acute injuries sustained from the explosions. The ethics of the bombings and their role in Japans surrender remain the subject of scholarly, since the atomic bombings of Hiroshima and Nagasaki, nuclear weapons have been detonated on over two thousand occasions for the purposes of testing and demonstration. Only a few nations possess such weapons or are suspected of seeking them, israel is also believed to possess nuclear weapons, though in a policy of deliberate ambiguity, it does not acknowledge having them. Germany, Italy, Turkey, Belgium and the Netherlands are nuclear weapons sharing states, south Africa is the only country to have independently developed and then renounced and dismantled its nuclear weapons. Modernisation of weapons continues to occur, all existing nuclear weapons derive some of their explosive energy from nuclear fission reactions. Weapons whose explosive output is exclusively from fission reactions are commonly referred to as bombs or atom bombs. This has long noted as something of a misnomer, as their energy comes from the nucleus of the atom. The latter approach is considered more sophisticated than the former and only the approach can be used if the fissile material is plutonium. A major challenge in all nuclear weapon designs is to ensure that a significant fraction of the fuel is consumed before the weapon destroys itself. The amount of energy released by fission bombs can range from the equivalent of just under a ton to upwards of 500,000 tons of TNT, all fission reactions necessarily generate fission products, the radioactive remains of the atomic nuclei split by the fission reactions. Many fission products are highly radioactive or moderately radioactive. Fission products are the radioactive component of nuclear fallout
12.
Glasgow
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Glasgow is the largest city in Scotland, and third largest in the United Kingdom. Historically part of Lanarkshire, it is now one of the 32 council areas of Scotland and it is situated on the River Clyde in the countrys West Central Lowlands. Inhabitants of the city are referred to as Glaswegians, Glasgow grew from a small rural settlement on the River Clyde to become the largest seaport in Britain. From the 18th century the city grew as one of Great Britains main hubs of transatlantic trade with North America. Glasgow was the Second City of the British Empire for much of the Victorian era and Edwardian period, in the late 19th and early 20th centuries Glasgow grew in population, reaching a peak of 1,128,473 in 1939. The entire region surrounding the conurbation covers about 2.3 million people, at the 2011 census, Glasgow had a population density of 8, 790/sq mi, the highest of any Scottish city. Glasgow hosted the 2014 Commonwealth Games and is well known in the sporting world for the football rivalry of the Old Firm between Celtic and Rangers. Glasgow is also known for Glasgow patter, a dialect that is noted for being difficult to understand by those from outside the city. Glasgow is the form of the ancient Cumbric name Glas Cau. Possibly referring to the area of Molendinar Burn where Glasgow Cathedral now stands, the later Gaelic name Baile Glas Chu, town of the grey dog, is purely a folk-etymology. The present site of Glasgow has been settled since prehistoric times, it is for settlement, being the furthest downstream fording point of the River Clyde, the origins of Glasgow as an established city derive ultimately from its medieval position as Scotlands second largest bishopric. Glasgow increased in importance during the 10th and 11th centuries as the site of this bishopric, reorganised by King David I of Scotland and John, there had been an earlier religious site established by Saint Mungo in the 6th century. The bishopric became one of the largest and wealthiest in the Kingdom of Scotland, bringing wealth, sometime between 1189 and 1195 this status was supplemented by an annual fair, which survives as the Glasgow Fair. Glasgow grew over the following centuries, the first bridge over the River Clyde at Glasgow was recorded from around 1285, giving its name to the Briggait area of the city, forming the main North-South route over the river via Glasgow Cross. The founding of the University of Glasgow in 1451 and elevation of the bishopric to become the Archdiocese of Glasgow in 1492 increased the towns religious and educational status and landed wealth. Its early trade was in agriculture, brewing and fishing, with cured salmon and herring being exported to Europe, Glasgow was subsequently raised to the status of Royal Burgh in 1611. The citys Tobacco Lords created a water port at Port Glasgow on the Firth of Clyde. By the late 18th century more than half of the British tobacco trade was concentrated on Glasgows River Clyde, at the time, Glasgow held a commercial importance as the city participated in the trade of sugar, tobacco and later cotton
