A boat is a watercraft of a large range of type and size. Ships are distinguished from boats based on their larger size and cargo or passenger capacity, their ability to carry boats. Small boats are found on inland waterways such as rivers and lakes, or in protected coastal areas. However, some boats, such as the whaleboat, were intended for use in an offshore environment. In modern naval terms, a boat is a vessel small enough to be carried aboard a ship. Anomalous definitions exist, as bulk freighters 1,000 feet long on the Great Lakes being known as oreboats. Boats vary in proportion and construction methods due to their intended purpose, available materials, or local traditions. Canoes have been used since prehistoric times and remain in use throughout the world for transportation and sport. Fishing boats vary in style to match local conditions. Pleasure craft used in recreational boating include ski boats, pontoon boats, sailboats. House boats may be used for long-term residence. Lighters are used to convey cargo to and from large ships unable to get close to shore.
Lifeboats have safety functions. Boats can be propelled by manpower and motor. Boats have served as transportation since the earliest times. Circumstantial evidence, such as the early settlement of Australia over 40,000 years ago, findings in Crete dated 130,000 years ago, in Flores dated to 900,000 years ago, suggest that boats have been used since prehistoric times; the earliest boats are thought to have been dugouts, the oldest boats found by archaeological excavation date from around 7,000–10,000 years ago. The oldest recovered boat in the world, the Pesse canoe, found in the Netherlands, is a dugout made from the hollowed tree trunk of a Pinus sylvestris, constructed somewhere between 8200 and 7600 BC; this canoe is exhibited in the Drents Museum in Netherlands. Other old dugout boats have been recovered. Rafts have operated for at least 8,000 years. A 7,000-year-old seagoing reed. Boats were used between 4000 and 3000 BC in the Indian Ocean. Boats played an important role in the commerce between the Indus Valley Civilization and Mesopotamia.
Evidence of varying models of boats has been discovered at various Indus Valley archaeological sites. Uru craft originate in Beypore, a village in south Calicut, Kerala, in southwestern India; this type of mammoth wooden ship was constructed of teak, with a transport capacity of 400 tonnes. The ancient Arabs and Greeks used such boats as trading vessels; the historians Herodotus, Pliny the Elder and Strabo record the use of boats for commerce and military purposes. Boats can be categorized into three main types: human-powered. Unpowered craft include rafts meant for one-way downstream travel. Human-powered boats include canoes, kayaks and boats propelled by poles like a punt. Sailboats, propelled by means of sails. Motorboats, propelled by mechanical means, such as engines; the hull is the main, in some cases only, structural component of a boat. It provides both buoyancy; the keel is a boat's "backbone", a lengthwise structural member to which the perpendicular frames are fixed. On most boats a deck covers the hull, in whole.
While a ship has several decks, a boat is unlikely to have more than one. Above the deck are lifelines connected to stanchions, bulwarks topped by gunnels, or some combination of the two. A cabin may protrude above the deck forward, along the centerline, or covering much of the length of the boat. Vertical structures dividing the internal spaces are known as bulkheads; the forward end of a boat is called the aft end the stern. Facing forward the right side is referred to as starboard and the left side as port; until the mid-19th century most boats were made of natural materials wood, although reed and animal skins were used. Early boats include the bound-reed style of boat seen in Ancient Egypt, the birch bark canoe, the animal hide-covered kayak and coracle and the dugout canoe made from a single log. By the mid-19th century, many boats had been built with iron or steel frames but still planked in wood. In 1855 ferro-cement boat construction was patented by the French, who coined the name "ferciment".
This is a system by which a steel or iron wire framework is built in the shape of a boat's hull and covered over with cement. Reinforced with bulkheads and other internal structure it is strong but heavy repaired, and, if sealed properly, will not leak or corrode; these materials and methods were copied all over the world and have faded in and out of popularity to the present time. As the forests of Britain and Europe continued to be over-harvested to supply the keels of larger wooden boats, the Bessemer process cheapened the cost of steel, steel ships and boats began to be more common. By the 1930s boats built of steel from frames to plating were seen replacing wooden boats in many industrial uses and fishing fleets. Private recreational boats of steel remain uncommon. In 1895 WH Mullins produced steel boats of galvanized iron and by 1930 became the world's largest producer of pleasure boats. Mullins offered boats in aluminum from 1895 through 1899 and once again in the 1920s, but it wasn't until the mid-20th century that aluminium gained widespread popularity.
Though much more expensive than steel, aluminum alloys exist that do not corrode in salt water, allowing a similar load carrying capacity to steel at much less weight. Around the mid-1960s, boats made of fiberglass became pop
The Arab street is an expression referring to the spectrum of public opinion in the Arab world as opposed or contrasted to the opinions of Arab governments. In some contexts it refers more to the lower socioeconomic strata of Arab society, it is used in the United States and Arab countries. While it is sometimes assumed in the United States, to have been borrowed from Arabic political discourse, its evolution has followed a circular course from Arabic to English and back. Lebanese newspapers began referring to just "the street" during the 1950s. Commentators added the "Arab" and dropped the scare quotes to create the current usage, which became widespread in American media during the First Palestinian Intifada in 1987. Arab media began using it themselves a decade later. However, its usage still differs between the two languages. In the Western English-language media, only Arab popular sentiment is referred to as the "street". Due to the many negative connotations attached to the use of "street" as a modifier, the use of the term in English has been criticized as fostering stereotypes of a population roused to violence.
The "Arab street" thus alternately justifies the need for an authoritarian ruler, or constrains the moderate actions of those rulers. In the wake of the Arab Spring early in the 2010s, the concept of the Arab street has been revisited and challenged; the revolutions that toppled governments have, to some, shown how deficient and outdated Western understandings of Arab public opinion, shaped by the concept of the "Arab street", had been and have led some to suggest it no longer be used. Others, including some Arabs, saw the uprisings as vindicating the importance of public opinion in their cultures and changing the popular concept of the street within them. Attempts to directly define the Arab street have equated it with Arab public opinion. New York Times columnist Thomas Friedman, who once covered the Middle East and writes about the region, called it "the broad mass of public opinion" there in 2002, as distinct from extremist opinion, which he calls the "Arab basement"; as of 2013, Collins English Dictionary defines "the Arab street" as an informal term for "public opinion in the Arab world."Nevertheless as the term came into wide use, there was disagreement about its exact meaning.
In 2002 a U. S. State Department official, reporting on a meeting between President George W. Bush and the leaders of Japan and Pakistan, said that the latter, Pervez Musharraf, had referred to the "possibility of trouble in the Arab street, whatever that is" over the upcoming invasion of Iraq; this uncertainty has led to confusion over. During the same period of time, Defense Secretary Donald Rumsfeld recalled, Arab leaders urged him to make sure the operation went as they "were worried about the'Arab street' erupting in anger at the West's invasion of a Muslim country. I was skeptical of the idea that a monolithic Arab street existed... but I did understand that popular discontent could cause them difficulties." According to a 2009 paper on the evolution and use of the term by professors Terry Regier and Muhammad Ali Khalidi, some of that confusion results from a frequent second meaning. Encompassing the majority of Arab public opinion, they observe, another usage seems to associate it more with "a presumed seething underclass within Arab society, one, viewed as a source of political trouble."
In a 1993 exploration of the Arab street's existence, David Pollock of the Washington Institute for Near East Policy began by acknowledging these connotations: "The name evokes images of mystery and mullahs. In November 2001, a front-page story in The New York Times on the Arab street's rising power in the wake of the terrorist attacks in the U. S. two months earlier began by evoking the term's visual connotations and the corresponding power vested in it by fearful Western observers: "The Arab street: the well-worn phrase evokes men clustered around dusty coffeehouse tables, discussing the events of the day with well-earned cynicism between puffs on a hookah—yet able to turn into a mob, powerful enough to sweep away governments." Ten years columnist Edwin Black wrote on the Fox News website, after protesters in Egypt began calling for longtime president Hosni Mubarak to step down, something, unthinkable, that the leader had fallen afoul of the Arab street... a dusty and irrepressible thoroughfare of fury whose frequent itinerary has been known and feared for generations in the Middle East...
Quite the Arab Street refers to the unexpected potential for popular upheaval at any time in any Arab locale. With no democratic venues to express popular wrath, this wrath pours onto the street and acts out en masse against the established order. In Arabic, the word for street is derived from a root whose other forms denote a place of entry or beginning, the point of a weapon, law or lawfulness and legitimacy in both the secular and religious sense. Among those words are sharia, the term for Islamic religious and moral law. Shāriʿ itself can be used to refer to a legislator or lawgiver, when used with the definite article a
Bugis, in Singapore, was renowned internationally from the 1950s to the 1980s for its nightly gathering of transvestites and transsexuals, a phenomenon which made it one of Singapore's top tourist destinations during that period. In the mid-1980s, Bugis Street underwent major urban redevelopment into a retail complex of modern shopping malls and nightspots mixed with regulated back-alley roadside vendors. Underground digging to construct the Bugis MRT station prior to that caused the upheaval and termination of the nightly transgender sex bazaar culture, marking the end of a colourful and unique era in Singapore's history. Today, the original Bugis Street is now a cobblestoned wide avenue sandwiched between the buildings of the Bugis Junction shopping complex. On the other hand, the lane presently touted as "Bugis Street" by the Singapore Tourist Promotion Board is developed from New Bugis Street Albert Street, is billed as "the largest street-shopping location in Singapore". An attempt by the Singapore Tourist Promotion Board to bring back the former exotic atmosphere was unsuccessful.
Although the street is now not a well-known tourist destination, it is frequented by many Singaporeans. Bugis Street lies in an extensive area, referred to in the past, by the Chinese-educated community, as Xiao Po; the latter stretched all the way through Singapore's Chinatown, to Jalan Sultan. The whole vicinity was thriving and crammed with merchants and traders, making it one of the most vibrant economic zones of old Singapore. According to knowledgeable long-term residents of the area, before the arrival of the British, there used to be a large canal which ran through the area where the Bugis, a seafaring people from South Sulawesi province in Indonesia, could sail up, moor their boats and trade with Singaporean merchants, it was these people. The Bugis, or Buginese put their sailing skills to less benign uses and gained a reputation in the region as a race of bloodthirsty pirates. During the early colonial era, there used to be low mounds of whitish sand in the area, earning the street the familiar Hokkien moniker of Peh Soa Pu or Bai Sha Fu in Mandarin.
The Cantonese, referred to the street as Hak Gaai or Hei Jie in Mandarin as there were many clubs catering to the Japanese invaders in the 1940s. During the first half of the 20th century, commuters could conveniently travel from Bugis Street to anywhere else in Xiao Po via a tram service which ran along North Bridge Road, referred to by the Chinese-educated as Xiao Po Da Ma Lu. Prior to the second world war, Bugis had a high proportion of Japanese prostitutes. At its peak, there were 633 Karauki-san to 109 brothels, with a high concentration within the compound of Bugis St, Malabar St and Hylam Street. Due to the lack of space within the Early Style shophouse, being two stories, applying to Rafflesian Shophouses and hygiene issues became prevalent. With many people using the same latrines and drinking water sources, disease spread with a cholera outbreak occurring in Bugis St, Malabar St and Hylam St, thus leading to them being zoned off. The bad hygiene and poor ventilation due to overcrowding of the sites led to the Singapore Improvement Trust trying to demolish those buildings and rebuild.
This led to the infamous "Bugis Street Case" which over the course of multiple courts decisions, decided that it was not legal to commandeer a building and only pay the price of the land, going on and the decision was made by 1937, that new houses should be built to alleviate overcrowding and problems that are associated instead of tearing it down and rebuilding, expecting change to occur. This established a new form of slum clearance in Singapore, more tied to the rights of the citizen and the owner. After World War II, hawkers gathered there to sell food and goods. There was also a small number of outdoor bars set up beside rat-infested drains; when transvestites began to rendezvous in the area in the 1950s, they attracted increasing numbers of Western tourists who came for the booze, the food, the pasar malam shopping and the "girls". Business boomed and Bugis Street became an lively and bustling area, forming the heart of Xiao Po, it was one of Singapore's most famous tourist meccas from the 1950s to the 1980s, renowned internationally for its nightly parade of flamboyantly-dressed transvestites and attracted hordes of Caucasian gawkers who had never before witnessed Asian queens in full regalia.
The latter would tease and sit on visitors' laps or pose for photographs for a fee. Others would sashay up and down the street looking to hook half-drunk sailors, American GIs and other foreigners on R&R, for an hour of profitable intimacy. Not only would these clients get the thrill of sex with an exotic oriental, there would be the added spice of transgressing gender boundaries in a seamy hovel. There was an adage amongst Westerners that one could tell, a real female and, not – the transvestites were drop-dead gorgeous, while the rest were real women; the amount of revenue that the transvestites of Bugis Street raked in was considerable, providing a booster shot in the arm for the tourism industry. The street was popularly called Boogie Street by British servicemen. Veterans recall. Halfway between Victoria and Queen Streets, there was an intersecting lane parallel to the main roads, als
Arabs are a population inhabiting the Arab world. They live in the Arab states in Western Asia, North Africa, the Horn of Africa and western Indian Ocean islands, they form a significant diaspora, with Arab communities established around the world. The first mention of Arabs is from the mid-ninth century BCE as a tribal people in eastern and southern Syria and the north of the Arabian Peninsula; the Arabs appear to have been under the vassalage of the Neo-Assyrian Empire, the succeeding Neo-Babylonian, Achaemenid and Parthian empires. Arab tribes, most notably the Ghassanids and Lakhmids, begin to appear in the southern Syrian Desert from the mid 3rd century CE onward, during the mid to stages of the Roman and Sasanian empires. Before the expansion of the Rashidun Caliphate, "Arab" referred to any of the nomadic and settled Semitic people from the Arabian Peninsula, Syrian Desert, North and Lower Mesopotamia. Today, "Arab" refers to a large number of people whose native regions form the Arab world due to the spread of Arabs and the Arabic language throughout the region during the early Muslim conquests of the 7th and 8th centuries and the subsequent Arabisation of indigenous populations.
The Arabs forged the Rashidun, Umayyad and the Fatimid caliphates, whose borders reached southern France in the west, China in the east, Anatolia in the north, the Sudan in the south. This was one of the largest land empires in history. In the early 20th century, the First World War signalled the end of the Ottoman Empire; this resulted in the defeat and dissolution of the empire and the partition of its territories, forming the modern Arab states. Following the adoption of the Alexandria Protocol in 1944, the Arab League was founded on 22 March 1945; the Charter of the Arab League endorsed the principle of an Arab homeland whilst respecting the individual sovereignty of its member states. Today, Arabs inhabit the 22 Arab states within the Arab League: Algeria, Comoros, Egypt, Jordan, Lebanon, Mauritania, Oman, Qatar, Saudi Arabia, Sudan, Tunisia, United Arab Emirates, Yemen; the Arab world stretches around 13 million km2, from the Atlantic Ocean in the west to the Arabian Sea in the east, from the Mediterranean Sea in the north to the Horn of Africa and the Indian Ocean in the southeast.
Beyond the boundaries of the League of Arab States, Arabs can be found in the global diaspora. The ties that bind Arabs are ethnic, cultural, identical, nationalist and political; the Arabs have their own customs, architecture, literature, dance, cuisine, society and mythology. The total number of Arabs are an estimated 450 million. Arabs are a diverse group in terms of religious practices. In the pre-Islamic era, most Arabs followed polytheistic religions; some tribes had adopted Christianity or Judaism, a few individuals, the hanifs observed monotheism. Today, about 93% of Arabs are adherents of Islam, there are sizable Christian minorities. Arab Muslims belong to the Sunni, Shiite and Alawite denominations. Arab Christians follow one of the Eastern Christian Churches, such as the Greek Orthodox or Greek Catholic churches. Other smaller minority religions are followed, such as the Bahá'í Faith and Druze. Arabs have influenced and contributed to diverse fields, notably the arts and architecture, philosophy, ethics, politics, music, cinema, medicine and technology in the ancient and modern history.
The earliest documented use of the word "Arab" to refer to a people appears in the Kurkh Monoliths, an Akkadian language record of the ninth century BCE Assyrian conquest of Aram, which referred to Bedouins of the Arabian Peninsula under King Gindibu, who fought as part of a coalition opposed to Assyria. Listed among the booty captured by the army of king Shalmaneser III of Assyria in the Battle of Qarqar are 1000 camels of "Gi-in-di-bu'u the ar-ba-a-a" or " Gindibu belonging to the Arab; the related word ʾaʿrāb is used to refer to Bedouins today, in contrast to ʿarab which refers to Arabs in general. The term Arab and ʾaʿrāb are mentioned around 40 times in pre-Islamic Sabaean inscriptions; the term Arab occurs in the titles of the Himyarite kings from the time of'Abu Karab Asad until MadiKarib Ya'fur. The term ʾaʿrāb is driven from the term Arab according to Sabaean grammar; the term is mentioned in Quranic verses referring to people who were living in Madina and it might be a south Arabian loan-word into Quranic language.
The oldest surviving indication of an Arab national identity is an inscription made in an archaic form of Arabic in 328 using the Nabataean alphabet, which refers to Imru' al-Qays ibn'Amr as "King of all the Arabs". Herodotus refers to the Arabs in the Sinai, southern Palestine, the frankincense region. Other ancient Greek historians like Agatharchides, Diodorus Siculus and Strabo mention Arabs living in Mesopotamia, in Egypt, southern Jordan, the Syrian steppe and in eastern Arabia. Inscriptions dating to the 6th century BCE in Yemen include the term "Arab"; the most popular Arab account holds that the word "Arab" came from an eponymous father called Ya'rub, the first to speak Arabic. A
Singapore the Republic of Singapore, is an island city-state in Southeast Asia. It lies one degree north of the equator, at the southern tip of the Malay Peninsula, with Indonesia's Riau Islands to the south and Peninsular Malaysia to the north. Singapore's territory consists of one main island along with 62 other islets. Since independence, extensive land reclamation has increased its total size by 23%; the country is known for its transition from a developing to a developed one in a single generation under the leadership of its founder Lee Kuan Yew. In 1819, Sir Stamford Raffles founded colonial Singapore as a trading post of the British East India Company. After the company's collapse in 1858, the islands were ceded to the British Raj as a crown colony. During the Second World War, Singapore was occupied by Japan, it gained independence from the British Empire in 1963 by joining Malaysia along with other former British territories, but separated two years over ideological differences, becoming a sovereign nation in 1965.
After early years of turbulence and despite lacking natural resources and a hinterland, the nation developed as an Asian Tiger economy, based on external trade and its workforce. Singapore is a global hub for education, finance, human capital, logistics, technology, tourism and transport; the city ranks in numerous international rankings, has been recognised as the most "technology-ready" nation, top International-meetings city, city with "best investment potential", world's smartest city, world's safest country, second-most competitive country, third least-corrupt country, third-largest foreign exchange market, third-largest financial centre, third-largest oil refining and trading centre, fifth-most innovative country, the second-busiest container port. The Economist has ranked Singapore as the most expensive city to live in, since 2013, it is identified as a tax haven. Singapore is the only country in Asia with an AAA sovereign rating from all major rating agencies, one of 11 worldwide. Globally, the Port of Singapore and Changi Airport have held the titles of leading "Maritime Capital" and "Best Airport" for consecutive years, while Singapore Airlines is the 2018 "World's Best Airline".
Singapore ranks 9th on the UN Human Development Index with the 3rd highest GDP per capita. It is placed in key social indicators: education, life expectancy, quality of life, personal safety and housing. Although income inequality is high, 90% of homes are owner-occupied. According to the Democracy Index, the country is described as a "flawed democracy"; the city-state is home to 5.6 million residents, 39% of whom are foreign nationals, including permanent residents. There are four official languages: English, Mandarin Chinese, Tamil, its cultural diversity is reflected in major festivals. Pew Research has found. Multiracialism has been enshrined in its constitution since independence, continues to shape national policies in education, politics, among others. Singapore is a unitary parliamentary republic with a Westminster system of unicameral parliamentary government; the People's Action Party has won every election since self-government began in 1959. As one of the five founding members of ASEAN, Singapore is the host of the Asia-Pacific Economic Cooperation Secretariat and Pacific Economic Cooperation Council Secretariat, as well as many international conferences and events.
It is a member of the East Asia Summit, Non-Aligned Movement and the Commonwealth of Nations. The English name of Singapore is an anglicisation of the native Malay name for the country, in turn derived from Sanskrit, hence the customary reference to the nation as the Lion City, its inclusion in many of the nation's symbols. However, it is unlikely that lions lived on the island. There are however other suggestions for the origin of the name and scholars do not believe that the origin of the name is established; the central island has been called Pulau Ujong as far back as the third century CE "island at the end" in Malay. Singapore is referred to as the Garden City for its tree-lined streets and greening efforts since independence, the Little Red Dot for how the island-nation is depicted on many maps of the world and Asia, as a red dot. Singapore is referred to as the "Switzerland of Asia" in 2017 due to its neutrality on international and regional issues; the Greco-Roman astronomer Ptolemy identified a place called Sabana in the general area in the second century, the earliest written record of Singapore occurs in a Chinese account from the third century, describing the island of Pu Luo Chung.
This was itself a transliteration from the Malay name "Pulau Ujong", or "island at the end". The Nagarakretagama, a Javanese epic poem written in 1365, referred to a settlement on the island called Tumasik. In 1299, according to the Malay Annals, the Kingdom of Singapura was founded on the island by Sang Nila Utama. Although the historicity
Fire is the rapid oxidation of a material in the exothermic chemical process of combustion, releasing heat and various reaction products. Slower oxidative processes like rusting or digestion are not included by this definition. Fire is hot because the conversion of the weak double bond in molecular oxygen, O2, to the stronger bonds in the combustion products carbon dioxide and water releases energy. At a certain point in the combustion reaction, called the ignition point, flames are produced; the flame is the visible portion of the fire. Flames consist of carbon dioxide, water vapor and nitrogen. If hot enough, the gases may become ionized to produce plasma. Depending on the substances alight, any impurities outside, the color of the flame and the fire's intensity will be different. Fire in its most common form can result in conflagration, which has the potential to cause physical damage through burning. Fire is an important process; the positive effects of fire include maintaining various ecological systems.
The negative effects of fire include hazard to life and property, atmospheric pollution, water contamination. If fire removes protective vegetation, heavy rainfall may lead to an increase in soil erosion by water; when vegetation is burned, the nitrogen it contains is released into the atmosphere, unlike elements such as potassium and phosphorus which remain in the ash and are recycled into the soil. This loss of nitrogen caused by a fire produces a long-term reduction in the fertility of the soil, which only recovers as nitrogen is "fixed" from the atmosphere by lightning and by leguminous plants such as clover. Fire has been used by humans in rituals, in agriculture for clearing land, for cooking, generating heat and light, for signaling, propulsion purposes, forging, incineration of waste, as a weapon or mode of destruction. Fires start when a flammable or a combustible material, in combination with a sufficient quantity of an oxidizer such as oxygen gas or another oxygen-rich compound, is exposed to a source of heat or ambient temperature above the flash point for the fuel/oxidizer mix, is able to sustain a rate of rapid oxidation that produces a chain reaction.
This is called the fire tetrahedron. Fire can not exist in the right proportions. For example, a flammable liquid will start burning only if the fuel and oxygen are in the right proportions; some fuel-oxygen mixes may require a catalyst, a substance, not consumed, when added, in any chemical reaction during combustion, but which enables the reactants to combust more readily. Once ignited, a chain reaction must take place whereby fires can sustain their own heat by the further release of heat energy in the process of combustion and may propagate, provided there is a continuous supply of an oxidizer and fuel. If the oxidizer is oxygen from the surrounding air, the presence of a force of gravity, or of some similar force caused by acceleration, is necessary to produce convection, which removes combustion products and brings a supply of oxygen to the fire. Without gravity, a fire surrounds itself with its own combustion products and non-oxidizing gases from the air, which exclude oxygen and extinguish the fire.
Because of this, the risk of fire in a spacecraft is small. This does not apply. Fire can be extinguished by removing any one of the elements of the fire tetrahedron. Consider a natural gas flame, such as from a stove-top burner; the fire can be extinguished by any of the following: turning off the gas supply, which removes the fuel source. In contrast, fire is intensified by increasing the overall rate of combustion. Methods to do this include balancing the input of fuel and oxidizer to stoichiometric proportions, increasing fuel and oxidizer input in this balanced mix, increasing the ambient temperature so the fire's own heat is better able to sustain combustion, or providing a catalyst, a non-reactant medium in which the fuel and oxidizer can more react. A flame is a mixture of reacting gases and solids emitting visible and sometimes ultraviolet light, the frequency spectrum of which depends on the chemical composition of the burning material and intermediate reaction products. In many cases, such as the burning of organic matter, for example wood, or the incomplete combustion of gas, incandescent solid particles called soot produce the familiar red-orange glow of "fire".
This light has a continuous spectrum. Complete combustion of gas has a dim blue color due to the emission of single-wavelength radiation from various electron transitions in the excited molecules formed in the flame. Oxygen is involved, but hydrogen burning in chlorine produces a flame, producing hydrogen chloride. Other possible combinations producing flames, amongst many, are fluorine and hydrogen, hydrazine and nitrogen tetroxide. Hydrogen and hydrazine/UDMH flames are
A merchant is a person who trades in commodities produced by other people. A merchant is anyone, involved in business or trade. Merchants have been known for as long as industry and trade have existed. During the 16th-century, in Europe, two different terms for merchants emerged: One term, described local traders such as bakers, etc.. The status of the merchant has varied during different periods of history and among different societies. In ancient Rome and Greece, merchants may have been wealthy, but were not accorded high social status. In contrast, in the Middle East, where markets were an integral part of the city, merchants enjoyed high status. In modern times, the term has been used to refer to a businessperson or someone undertaking activities for the purpose of generating profit, cash flow and revenue utilizing a combination of human, financial and physical capital with a view to fuelling economic development and growth. Merchants have been known for as long as humans have engaged in commerce.
Merchants and merchant networks were known to operate in ancient Babylonia and Assyria, Egypt, India, Persia and Rome. During the European medieval period, a rapid expansion in trade and commerce, led to the rise of a wealthy and powerful merchant class; the European age of discovery opened up new trading routes and gave European consumers access to a much broader range of goods. From the 1600s, goods began to travel much further distances as they found their way into geographically dispersed market places. Following the opening Asia and the discovery of the New World, goods were imported from long distances: calico cloth from India, porcelain and tea from China, spices from India and South-East Asia and tobacco, sugar and coffee from the New World. By the eighteenth century, a new type of manufacturer-merchant was emerging and modern business practices were becoming evident; the English term, "merchant" comes from the Middle English, which itself originated from the Vulgar Latin mercatant or mercatans, formed from present participle of mercatare meaning to trade, to traffic or to deal in.
The term is used to refer to any type of reseller, but can be used with a specific qualifier to suggest a person who deals in a given characteristic such as "speed merchant" to refer to someone who enjoys fast driving. Other known uses of the term include: "dream merchant" used to describe someone who peddles idealistic visionary scenarios and "merchant of war" to describe proponents of war. Elizabeth Honig has argued that concepts relating to the role of a merchant began to change in the mid-16th century; the Dutch term, became rather more fluid during the 16th century when Antwerp was the most global market town in Europe. Two different terms, for a merchant, began to be used, meerseniers referred to local merchants including bakers, sellers of dairy products and stall-holders, while the alternate term, was used to describe those who traded in goods or credit on a large scale; this distinction was necessary to separate the daily trade that the general population understood from the rising ranks of traders who took up their places on a world stage and were seen as quite distant from everyday experience.
Broadly, merchants can be classified into two categories: A wholesale merchant operates in the chain between the producer and retail merchant dealing in large quantities of goods. In other words, a wholesaler does not sell directly to end-users; some wholesale merchants only organize the movement of goods rather than move the goods themselves. A retail merchant or retailer sells merchandise to end-users or consumers in small quantities. A shop-keeper is a retail merchant. However, the term'merchant' is used in a variety of specialised contexts such as in merchant banker, merchant navy or merchant services. Merchants have existed as long as business and commerce have been conducted. A merchant class characterized many pre-modern societies. Open air, public markets, where merchants and traders congregated, were known in ancient Babylonia and Assyria, Egypt, India, Persia and Rome; these markets occupied a place in the town's centre. Surrounding the market, skilled artisans, such as metal-workers and leather workers, occupied premises in alley ways that led to the open market-place.
These artisans may have sold wares directly from their premises, but prepared goods for sale on market days. In ancient Greece markets operated within the agora, in ancient Rome the forum. Rome had two forums; the latter was a vast expanse. The Roman forum was arguably the earliest example of a permanent retail shop-front. In antiquity, exchange involved direct selling through permanent or semi-permanent retail premises such as stall-holders at market places or shop-keepers selling from their own premises or through door-to-door direct sales via merchants or peddlers; the nature of direct selling centred around transactional exchange, where the goods were on open display, allowing buyers to evaluate quality directly through visual inspection. Relationships between merchant and consumer were minimal playing into public concerns about the quality of produce; the Phoenicians were well known amongst contemporaries as "traders in purple" – a