Tourism is travel for pleasure or business. Tourism may be international, or within the traveller's country; the World Tourism Organization defines tourism more in terms which go "beyond the common perception of tourism as being limited to holiday activity only", as people "traveling to and staying in places outside their usual environment for not more than one consecutive year for leisure and not less than 24 hours and other purposes". Tourism can be domestic or international, international tourism has both incoming and outgoing implications on a country's balance of payments. Tourism suffered as a result of a strong economic slowdown of the late-2000s recession, between the second half of 2008 and the end of 2009, the outbreak of the H1N1 influenza virus, but recovered. International tourism receipts grew to US$1.03 trillion in 2005, corresponding to an increase in real terms of 3.8% from 2010. International tourist arrivals surpassed the milestone of 1 billion tourists globally for the first time in 2012, emerging markets such as China and Brazil had increased their spending over the previous decade.
The ITB Berlin is the world's leading tourism trade fair. Global tourism accounts for ca. 8% of global greenhouse gas emissions. The word tourist was used in 1772 and tourism in 1811, it is formed from the word tour, derived from Old English turian, from Old French torner, from Latin tornare. Tourism has become an important source of income for many regions and entire countries; the Manila Declaration on World Tourism of 1980 recognized its importance as "an activity essential to the life of nations because of its direct effects on the social, cultural and economic sectors of national societies and on their international relations."Tourism brings large amounts of income into a local economy in the form of payment for goods and services needed by tourists, accounting as of 2011 for 30% of the world's trade in services, for 6% of overall exports of goods and services. It generates opportunities for employment in the service sector of the economy associated with tourism; the hospitality industries which benefit from tourism include transportation services.
This is in addition to goods bought by tourists, including souvenirs. On the flip-side, tourism can degrade sour relationships between host and guest. In 1936, the League of Nations defined a foreign tourist as "someone traveling abroad for at least twenty-four hours", its successor, the United Nations, amended this definition in 1945, by including a maximum stay of six months. In 1941, Hunziker and Kraft defined tourism as "the sum of the phenomena and relationships arising from the travel and stay of non-residents, insofar as they do not lead to permanent residence and are not connected with any earning activity." In 1976, the Tourism Society of England's definition was: "Tourism is the temporary, short-term movement of people to destinations outside the places where they live and work and their activities during the stay at each destination. It includes movements for all purposes." In 1981, the International Association of Scientific Experts in Tourism defined tourism in terms of particular activities chosen and undertaken outside the home.
In 1994, the United Nations identified three forms of tourism in its Recommendations on Tourism Statistics: Domestic tourism, involving residents of the given country traveling only within this country Inbound tourism, involving non-residents traveling in the given country Outbound tourism, involving residents traveling in another countryThe terms tourism and travel are sometimes used interchangeably. In this context, travel implies a more purposeful journey; the terms tourism and tourist are sometimes used pejoratively, to imply a shallow interest in the cultures or locations visited. By contrast, traveler is used as a sign of distinction; the sociology of tourism has studied the cultural values underpinning these distinctions and their implications for class relations. International tourist arrivals reached 1.035 billion in 2012, up from over 996 million in 2011, 952 million in 2010. In 2011 and 2012, international travel demand continued to recover from the losses resulting from the late-2000s recession, where tourism suffered a strong slowdown from the second half of 2008 through the end of 2009.
After a 5% increase in the first half of 2008, growth in international tourist arrivals moved into negative territory in the second half of 2008, ended up only 2% for the year, compared to a 7% increase in 2007. The negative trend intensified during 2009, exacerbated in some countries due to the outbreak of the H1N1 influenza virus, resulting in a worldwide decline of 4.2% in 2009 to 880 million international tourists arrivals, a 5.7% decline in international tourism receipts. The World Tourism Organization reports the following ten destinations as the most visited in terms of the number of international travelers in 2017. International tourism receipts grew to US$1.26 Trillion in 2015, corresponding to an increase in real terms of 4.4% from 2014. The World Tourism Organization reports the following entities as the top ten tourism earners for the year 2015: The World Tourism Organizati
An island or isle is any piece of sub-continental land, surrounded by water. Small islands such as emergent land features on atolls can be called islets, cays or keys. An island in a river or a lake island may be called an eyot or ait, a small island off the coast may be called a holm. A grouping of geographically or geologically related islands is called an archipelago, such as the Philippines. An island may be described despite the presence of an artificial land bridge; some places may retain "island" in their names for historical reasons after being connected to a larger landmass by a land bridge or landfill, such as Coney Island and Coronado Island, though these are speaking, tied islands. Conversely, when a piece of land is separated from the mainland by a man-made canal, for example the Peloponnese by the Corinth Canal or Marble Hill in northern Manhattan during the time between the building of the United States Ship Canal and the filling-in of the Harlem River which surrounded the area, it is not considered an island.
There are two main types of islands in the sea: oceanic. There are artificial islands; the word island derives from Middle English iland, from Old English igland. However, the spelling of the word was modified in the 15th century because of a false etymology caused by an incorrect association with the etymologically unrelated Old French loanword isle, which itself comes from the Latin word insula. Old English ieg is a cognate of Swedish ö and German Aue, related to Latin aqua. Greenland is the world's largest island, with an area of over 2.1 million km2, while Australia, the world's smallest continent, has an area of 7.6 million km2, but there is no standard of size that distinguishes islands from continents, or from islets. There is a difference between continents in terms of geology. Continents are the largest landmass of a particular continental plate. By contrast, islands are either extensions of the oceanic crust, or belong to a continental plate containing a larger landmass. Continental islands are bodies of land.
Examples are Borneo, Sumatra, Sakhalin and Hainan off Asia. A special type of continental island is the microcontinental island, created when a continent is rifted. Examples are Madagascar and Socotra off Africa, New Caledonia, New Zealand, some of the Seychelles. Another subtype is an island or bar formed by deposition of tiny rocks where water current loses some of its carrying capacity; this includes: barrier islands, which are accumulations of sand deposited by sea currents on the continental shelves fluvial or alluvial islands formed in river deltas or midstream within large rivers. While some are transitory and may disappear if the volume or speed of the current changes, others are stable and long-lived. Islets are small islands. Oceanic islands are islands; the vast majority are volcanic in origin, such as Saint Helena in the South Atlantic Ocean. The few oceanic islands that are not volcanic are tectonic in origin and arise where plate movements have lifted up the ocean floor above the surface.
Examples are Saint Paul Rocks in the Atlantic Ocean and Macquarie Island in the Pacific. One type of volcanic oceanic island is found in a volcanic island arc; these islands arise from volcanoes. Examples are the Aleutian Islands, the Mariana Islands, most of Tonga in the Pacific Ocean; the only examples in the Atlantic Ocean are some of the Lesser Antilles and the South Sandwich Islands. Another type of volcanic oceanic island occurs. There are two examples: Iceland, the world's second largest volcanic island, Jan Mayen. Both are in the Atlantic. A third type of volcanic oceanic island is formed over volcanic hotspots. A hotspot is more or less stationary relative to the moving tectonic plate above it, so a chain of islands results as the plate drifts. Over long periods of time, this type of island is "drowned" by isostatic adjustment and eroded, becoming a seamount. Plate movement across a hot-spot produces a line of islands oriented in the direction of the plate movement. An example is the Hawaiian Islands, from Hawaii to Kure, which continue beneath the sea surface in a more northerly direction as the Emperor Seamounts.
Another chain with similar orientation is the Tuamotu Archipelago. The southernmost chain is the Austral Islands, with its northerly trending part the atolls in the nation of Tuvalu. Tristan da Cunha is an example of a hotspot volcano in the Atlantic Ocean. Another hotspot in the Atlantic is the island of Surtsey, formed in 1963. An atoll is an island formed from a coral reef that has grown on an eroded and submerged volcanic island; the reef forms a new island. Atolls are ring-shaped with a central lagoon. Examples are the Line Islands
The Bahamas, known as the Commonwealth of The Bahamas, is a country within the Lucayan Archipelago. The archipelagic state consists of more than 700 islands and islets in the Atlantic Ocean, is located north of Cuba and Hispaniola, northwest of the Turks and Caicos Islands, southeast of the U. S. state of Florida, east of the Florida Keys. The capital is Nassau on the island of New Providence; the designation of "the Bahamas" can refer either to the country or to the larger island chain that it shares with the Turks and Caicos Islands. The Royal Bahamas Defence Force describes the Bahamas territory as encompassing 470,000 km2 of ocean space; the Bahamas is the site of Columbus's first landfall in the New World in 1492. At that time, the islands were inhabited by the Lucayans, a branch of the Arawakan-speaking Taíno people. Although the Spanish never colonised the Bahamas, they shipped the native Lucayans to slavery in Hispaniola; the islands were deserted from 1513 until 1648, when English colonists from Bermuda settled on the island of Eleuthera.
The Bahamas became a British crown colony in 1718. After the American Revolutionary War, the Crown resettled thousands of American Loyalists in the Bahamas. Africans constituted the majority of the population from this period; the slave trade was abolished by the British in 1807. Subsequently, the Bahamas became a haven for freed African slaves. Today, Afro-Bahamians make up nearly 90% of the population; the Bahamas became an independent Commonwealth realm in 1973 with Elizabeth II as its queen. In terms of gross domestic product per capita, the Bahamas is one of the richest countries in the Americas, with an economy based on tourism and finance; the name Bahamas is most derived from either the Taíno ba ha ma, a term for the region used by the indigenous Native Americans, or from the Spanish baja mar reflecting the shallow waters of the area. Alternatively, it may originate from a local name of unclear meaning; the word The constitutes an integral part of the short form of the name and is, capitalised.
So in contrast to "the Congo" and "the United Kingdom", it is proper to write "The Bahamas." The name The Bahamas is thus comparable with certain non-English names that use the definite article, such as Las Vegas or Los Angeles. The Constitution of the Commonwealth of The Bahamas, the country's fundamental law, capitalizes the "T" in "The Bahamas." Taino people moved into the uninhabited southern Bahamas from Hispaniola and Cuba around the 11th century, having migrated there from South America. They came to be known as the Lucayan people. An estimated 30,000 Lucayans inhabited the Bahamas at the time of Christopher Columbus's arrival in 1492. Columbus's first landfall in the New World was on an island; some researchers believe this site to be present-day San Salvador Island, situated in the southeastern Bahamas. An alternative theory holds that Columbus landed to the southeast on Samana Cay, according to calculations made in 1986 by National Geographic writer and editor Joseph Judge, based on Columbus's log.
Evidence in support of this remains inconclusive. On the landfall island, Columbus exchanged goods with them; the Spanish forced much of the Lucayan population to Hispaniola for use as forced labour. The slaves suffered from harsh conditions and most died from contracting diseases to which they had no immunity; the population of the Bahamas was diminished. In 1648, the Eleutherian Adventurers, led by William Sayle, migrated from Bermuda; these English Puritans established the first permanent European settlement on an island which they named Eleuthera—the name derives from the Greek word for freedom. They settled New Providence, naming it Sayle's Island after one of their leaders. To survive, the settlers salvaged goods from wrecks. In 1670, King Charles II granted the islands to the Lords Proprietors of the Carolinas in North America, they rented the islands from the king with rights of trading, appointing governors, administering the country. In 1684 Spanish corsair Juan de Alcon raided Charles Town.
In 1703, a joint Franco-Spanish expedition occupied the Bahamian capital during the War of the Spanish Succession. During proprietary rule, the Bahamas became a haven for pirates, including Blackbeard. To put an end to the'Pirates' republic' and restore orderly government, Great Britain made the Bahamas a crown colony in 1718 under the royal governorship of Woodes Rogers. After a difficult struggle, he succeeded in suppressing piracy. In 1720, Rogers led local militia to drive off a Spanish attack. During the US War of Independence in the late 18th century, the islands became a target for US naval forces under the command of Commodore Esek Hopkins. US Marines occupied the capital of Nassau for 2 weeks. In 1782, following the British defeat at Yorktown, a Spanish fleet appeared off the coast of Nassau; the city surrendered without a fight. Spain returned possession of the Bahamas to Great Britain the following year, u
A flash flood is a rapid flooding of low-lying areas: washes, dry lakes and basins. It may be caused by heavy rain associated with a severe thunderstorm, tropical storm, or meltwater from ice or snow flowing over ice sheets or snowfields. Flash floods may occur after the collapse of a natural ice or debris dam, or a human structure such as a man-made dam, as occurred before the Johnstown Flood of 1889. Flash floods are distinguished from regular floods by having a timescale of fewer than six hours between rainfall and the onset of flooding; the water, temporarily available is used by plants with rapid germination and short growth cycles and by specially adapted animal life. Flash floods can occur under several types of conditions. Flash flooding occurs when it rains on saturated soil or dry soil that has poor absorption ability; the runoff collects in gullies and streams and, as they join to form larger volumes forms a fast flowing front of water and debris. Flash floods most occur in dry areas that have received precipitation, but they may be seen anywhere downstream from the source of the precipitation many miles from the source.
In areas on or near volcanoes, flash floods have occurred after eruptions, when glaciers have been melted by the intense heat. Flash floods are known to occur in the highest mountain ranges of the United States and are common in the arid plains of the Southwestern United States. Flash flooding can be caused by extensive rainfall released by hurricanes and other tropical storms, as well as the sudden thawing effect of ice dams. Human activities can cause flash floods to occur; when dams fail, a large quantity of water can destroy everything in its path. The United States National Weather Service gives the advice "Turn Around, Don't Drown" for flash floods. Many people tend to underestimate the dangers of flash floods. What makes flash floods most dangerous is their sudden nature and fast-moving water. A vehicle provides little to no protection against being swept away. More than half of the fatalities attributed to flash floods are people swept away in vehicles when trying to cross flooded intersections.
As little as 2 feet of water is enough to carry away most SUV-sized vehicles. The U. S. National Weather Service reported in 2005 that, using a national 30-year average, more people die yearly in floods, 127 on average, than by lightning, tornadoes, or hurricanes. In deserts, flash floods can be deadly for several reasons. First, storms in arid regions are infrequent, but they can deliver an enormous amount of water in a short time. Second, these rains fall on poorly absorbent and clay-like soil, which increases the amount of runoff that rivers and other water channels have to handle; these regions tend not to have the infrastructure that wetter regions have to divert water from structures and roads, such as storm drains and retention basins, either because of sparse population or poverty, or because residents believe the risk of flash floods is not high enough to justify the expense. In fact, in some areas, desert roads cross a dry river and creek beds without bridges. From the driver's perspective, there may be clear weather, when a river unexpectedly forms ahead of or around the vehicle in a matter of seconds.
The lack of regular rain to clear water channels may cause flash floods in deserts to be headed by large amounts of debris, such as rocks and logs. Deep slot canyons can be dangerous to hikers as they may be flooded by a storm that occurs on a mesa miles away; the flood sweeps through the canyon. 1889: Johnstown Flood, Pennsylvania, U. S.: more than 2,200 people dead 1903: Heppner Flood of 1903. S.: 115 dead 1938: Kopuawhara flash flood of 1938, Mahia Peninsula, New Zealand: 21 dead 1952: Lynmouth disaster, England: 34 dead 1963: Petra Flash Flood, Jordan: 23 dead 1963: Vajont dam disaster, Italy: 1910 dead 1967: Flash flood in Lisbon, Portugal: 464 dead 1969: Nelson County, Virginia, US: 123 dead 1971: Kuala Lumpur floods, Malaysia: 32 dead 1972: The Black Hills flood, South Dakota, U. S.: 238 dead 1976: The Big Thompson River flood, Colorado, U. S.: 143 dead 1997: Antelope Canyon, a popular tourist attraction north of Page, Arizona:11 dead 2003: Bukit Lawang in Indonesia 239 people were killed 2006: Jember Regency in Indonesia 59 people dead 2007: Sudan floods, 64 dead.
2009: September 26 in Metro Manila Marikina city, Taguig City, Pasig City. It submerged several municipalities under feet of deep water for several weeks. 2009: October 1, Messina, 37 dead. See 2009 Messina floods and mudslides. 2010: Madeira archipelago, 42 dead 2011: Lockyer Valley, Australia. 21 dead in the town of Grantham. 2011: Philippines, Cagayan de Oro and Iligan City, 17 December 2011. At least 1200 dead 2012: May 5, Nearly three weeks of damming left 72 dead in the Seti Gorge in Upper Seti Basin. Rock and avalanche fall from the western part of Annapurna IV mountain in Nepal. 2012: Krasnodarskiy Kray, Russia. 172 dead following a flash flood that struck at 2 A. M. local time on 7 July. Main cities that were hit are Gelendzhik. 2013: Uttarakhand, India: 822 dead 2013: Novemb
The United Kingdom the United Kingdom of Great Britain and Northern Ireland, sometimes referred to as Britain, is a sovereign country located off the north-western coast of the European mainland. The United Kingdom includes the island of Great Britain, the north-eastern part of the island of Ireland, many smaller islands. Northern Ireland is the only part of the United Kingdom that shares a land border with another sovereign state, the Republic of Ireland. Apart from this land border, the United Kingdom is surrounded by the Atlantic Ocean, with the North Sea to the east, the English Channel to the south and the Celtic Sea to the south-west, giving it the 12th-longest coastline in the world; the Irish Sea lies between Great Ireland. With an area of 242,500 square kilometres, the United Kingdom is the 78th-largest sovereign state in the world, it is the 22nd-most populous country, with an estimated 66.0 million inhabitants in 2017. The UK is constitutional monarchy; the current monarch is Queen Elizabeth II, who has reigned since 1952, making her the longest-serving current head of state.
The United Kingdom's capital and largest city is London, a global city and financial centre with an urban area population of 10.3 million. Other major urban areas in the UK include Greater Manchester, the West Midlands and West Yorkshire conurbations, Greater Glasgow and the Liverpool Built-up Area; the United Kingdom consists of four constituent countries: England, Scotland and Northern Ireland. Their capitals are London, Edinburgh and Belfast, respectively. Apart from England, the countries have their own devolved governments, each with varying powers, but such power is delegated by the Parliament of the United Kingdom, which may enact laws unilaterally altering or abolishing devolution; the nearby Isle of Man, Bailiwick of Guernsey and Bailiwick of Jersey are not part of the UK, being Crown dependencies with the British Government responsible for defence and international representation. The medieval conquest and subsequent annexation of Wales by the Kingdom of England, followed by the union between England and Scotland in 1707 to form the Kingdom of Great Britain, the union in 1801 of Great Britain with the Kingdom of Ireland created the United Kingdom of Great Britain and Ireland.
Five-sixths of Ireland seceded from the UK in 1922, leaving the present formulation of the United Kingdom of Great Britain and Northern Ireland. There are fourteen British Overseas Territories, the remnants of the British Empire which, at its height in the 1920s, encompassed a quarter of the world's land mass and was the largest empire in history. British influence can be observed in the language and political systems of many of its former colonies; the United Kingdom is a developed country and has the world's fifth-largest economy by nominal GDP and ninth-largest economy by purchasing power parity. It has a high-income economy and has a high Human Development Index rating, ranking 14th in the world, it was the world's first industrialised country and the world's foremost power during the 19th and early 20th centuries. The UK remains a great power, with considerable economic, military and political influence internationally, it is sixth in military expenditure in the world. It has been a permanent member of the United Nations Security Council since its first session in 1946.
It has been a leading member state of the European Union and its predecessor, the European Economic Community, since 1973. The United Kingdom is a member of the Commonwealth of Nations, the Council of Europe, the G7, the G20, NATO, the Organisation for Economic Co-operation and Development and the World Trade Organization; the 1707 Acts of Union declared that the kingdoms of England and Scotland were "United into One Kingdom by the Name of Great Britain". The term "United Kingdom" has been used as a description for the former kingdom of Great Britain, although its official name from 1707 to 1800 was "Great Britain"; the Acts of Union 1800 united the kingdom of Great Britain and the kingdom of Ireland in 1801, forming the United Kingdom of Great Britain and Ireland. Following the partition of Ireland and the independence of the Irish Free State in 1922, which left Northern Ireland as the only part of the island of Ireland within the United Kingdom, the name was changed to the "United Kingdom of Great Britain and Northern Ireland".
Although the United Kingdom is a sovereign country, Scotland and Northern Ireland are widely referred to as countries. The UK Prime Minister's website has used the phrase "countries within a country" to describe the United Kingdom; some statistical summaries, such as those for the twelve NUTS 1 regions of the United Kingdom refer to Scotland and Northern Ireland as "regions". Northern Ireland is referred to as a "province". With regard to Northern Ireland, the descriptive name used "can be controversial, with the choice revealing one's political preferences"; the term "Great Britain" conventionally refers to the island of Great Britain, or politically to England and Wales in combination. However, it is sometimes used as a loose synonym for the United Kingdom as a whole; the term "Britain" is used both as a synonym for Great Britain, as a synonym for the United Kingdom. Usage is mixed, with the BBC preferring to use Britain as shorthand only for Great Britain and the UK Government, while accepting that both terms refer to the United K
Hydropower or water power is power derived from the energy of falling water or fast running water, which may be harnessed for useful purposes. Since ancient times, hydropower from many kinds of watermills has been used as a renewable energy source for irrigation and the operation of various mechanical devices, such as gristmills, textile mills, trip hammers, dock cranes, domestic lifts, ore mills. A trompe, which produces compressed air from falling water, is sometimes used to power other machinery at a distance. In the late 19th century, hydropower became a source for generating electricity. Cragside in Northumberland was the first house powered by hydroelectricity in 1878 and the first commercial hydroelectric power plant was built at Niagara Falls in 1879. In 1881, street lamps in the city of Niagara Falls were powered by hydropower. Since the early 20th century, the term has been used exclusively in conjunction with the modern development of hydroelectric power. International institutions such as the World Bank view hydropower as a means for economic development without adding substantial amounts of carbon to the atmosphere, but dams can have significant negative social and environmental impacts.
In India, water wheels and watermills were built as early as the 4th century BC, although records of that era are spotty at best. In the Roman Empire, water-powered mills produced flour from grain, were used for sawing timber and stone. In China and the rest of the Far East, hydraulically operated "pot wheel" pumps raised water into crop or irrigation canals; the power of a wave of water released from a tank was used for extraction of metal ores in a method known as hushing. The method was first used at the Dolaucothi Gold Mines in Wales from 75 AD onwards, but had been developed in Spain at such mines as Las Médulas. Hushing was widely used in Britain in the Medieval and periods to extract lead and tin ores, it evolved into hydraulic mining when used during the California Gold Rush. In the Middle Ages, Islamic mechanical engineer Al-Jazari described designs for 50 devices, many of them water powered, in his book, The Book of Knowledge of Ingenious Mechanical Devices, including clocks, a device to serve wine, five devices to lift water from rivers or pools, though three are animal-powered and one can be powered by animal or water.
These include an endless belt with jugs attached, a cow-powered shadoof, a reciprocating device with hinged valves. In 1753, French engineer Bernard Forest de Bélidor published Architecture Hydraulique which described vertical- and horizontal-axis hydraulic machines. By the late nineteenth century, the electric generator was developed by a team led by project managers and prominent pioneers of renewable energy Jacob S. Gibbs and Brinsley Coleberd and could now be coupled with hydraulics; the growing demand for the Industrial Revolution would drive development as well. Hydraulic power networks used pipes to carry pressurized water and transmit mechanical power from the source to end users; the power source was a head of water, which could be assisted by a pump. These were extensive in Victorian cities in the United Kingdom. A hydraulic power network was developed in Geneva, Switzerland; the world-famous Jet d'Eau was designed as the over-pressure relief valve for the network. At the beginning of the Industrial Revolution in Britain, water was the main source of power for new inventions such as Richard Arkwright's water frame.
Although the use of water power gave way to steam power in many of the larger mills and factories, it was still used during the 18th and 19th centuries for many smaller operations, such as driving the bellows in small blast furnaces and gristmills, such as those built at Saint Anthony Falls, which uses the 50-foot drop in the Mississippi River. In the 1830s, at the early peak in the US canal-building, hydropower provided the energy to transport barge traffic up and down steep hills using inclined plane railroads; as railroads overtook canals for transportation, canal systems were modified and developed into hydropower systems. Technological advances had moved the open water wheel into an enclosed water motor. In 1848 James B. Francis, while working as head engineer of Lowell's Locks and Canals company, improved on these designs to create a turbine with 90% efficiency, he applied scientific principles and testing methods to the problem of turbine design. His mathematical and graphical calculation methods allowed the confident design of high-efficiency turbines to match a site's specific flow conditions.
The Francis reaction turbine is still in wide use today. In the 1870s, deriving from uses in the California mining industry, Lester Allan Pelton developed the high efficiency Pelton wheel impulse turbine, which utilized hydropower from the high head streams characteristic of the mountainous California interior. A hydropower resource can be evaluated by its available power. Power is a function of volumetric flow rate; the head is the energy per unit weight of water. The static head is proportional to the difference in height. Dynamic head is related to the velocity of moving water; each unit of water can do an amount of work equal to its weight times the head. The power available from falling water can be calculated from the flow rate and density of water, the height of fall, the local acceleration due to gravity: W ˙ o u t =
The Philippines the Republic of the Philippines, is an archipelagic country in Southeast Asia. Situated in the western Pacific Ocean, it consists of about 7,641 islands that are categorized broadly under three main geographical divisions from north to south: Luzon and Mindanao; the capital city of the Philippines is Manila and the most populous city is Quezon City, both part of Metro Manila. Bounded by the South China Sea on the west, the Philippine Sea on the east and the Celebes Sea on the southwest, the Philippines shares maritime borders with Taiwan to the north, Vietnam to the west, Palau to the east, Malaysia and Indonesia to the south; the Philippines' location on the Pacific Ring of Fire and close to the equator makes the Philippines prone to earthquakes and typhoons, but endows it with abundant natural resources and some of the world's greatest biodiversity. The Philippines has an area of 300,000 km2, according to the Philippines Statistical Authority and the WorldBank and, as of 2015, had a population of at least 100 million.
As of January 2018, it is the eighth-most populated country in Asia and the 12th most populated country in the world. 10 million additional Filipinos lived overseas, comprising one of the world's largest diasporas. Multiple ethnicities and cultures are found throughout the islands. In prehistoric times, Negritos were some of the archipelago's earliest inhabitants, they were followed by successive waves of Austronesian peoples. Exchanges with Malay, Indian and Chinese nations occurred. Various competing maritime states were established under the rule of datus, rajahs and lakans; the arrival of Ferdinand Magellan, a Portuguese explorer leading a fleet for the Spanish, in Homonhon, Eastern Samar in 1521 marked the beginning of Hispanic colonization. In 1543, Spanish explorer Ruy López de Villalobos named the archipelago Las Islas Filipinas in honor of Philip II of Spain. With the arrival of Miguel López de Legazpi from Mexico City, in 1565, the first Hispanic settlement in the archipelago was established.
The Philippines became part of the Spanish Empire for more than 300 years. This resulted in Catholicism becoming the dominant religion. During this time, Manila became the western hub of the trans-Pacific trade connecting Asia with Acapulco in the Americas using Manila galleons; as the 19th century gave way to the 20th, the Philippine Revolution followed, which spawned the short-lived First Philippine Republic, followed by the bloody Philippine–American War. The war, as well as the ensuing cholera epidemic, resulted in the deaths of thousands of combatants as well as tens of thousands of civilians. Aside from the period of Japanese occupation, the United States retained sovereignty over the islands until after World War II, when the Philippines was recognized as an independent nation. Since the unitary sovereign state has had a tumultuous experience with democracy, which included the overthrow of a dictatorship by a non-violent revolution; the Philippines is a founding member of the United Nations, World Trade Organization, Association of Southeast Asian Nations, the Asia-Pacific Economic Cooperation forum, the East Asia Summit.
It hosts the headquarters of the Asian Development Bank. The Philippines is considered to be an emerging market and a newly industrialized country, which has an economy transitioning from being based on agriculture to one based more on services and manufacturing. Along with East Timor, the Philippines is one of Southeast Asia's predominantly Christian nations; the Philippines was named in honor of King Philip II of Spain. Spanish explorer Ruy López de Villalobos, during his expedition in 1542, named the islands of Leyte and Samar Felipinas after the then-Prince of Asturias; the name Las Islas Filipinas would be used to cover all the islands of the archipelago. Before that became commonplace, other names such as Islas del Poniente and Magellan's name for the islands San Lázaro were used by the Spanish to refer to the islands; the official name of the Philippines has changed several times in the course of its history. During the Philippine Revolution, the Malolos Congress proclaimed the establishment of the República Filipina or the Philippine Republic.
From the period of the Spanish–American War and the Philippine–American War until the Commonwealth period, American colonial authorities referred to the country as the Philippine Islands, a translation of the Spanish name. Since the end of World War II, the official name of the country has been the Republic of the Philippines. Philippines has gained currency as the common name since being the name used in Article VI of the 1898 Treaty of Paris, with or without the definite article. Discovery in 2018 of stone tools and fossils of butchered animal remains in Rizal, Kalinga has pushed back evidence of early hominins in the archipelago to as early as 709,000 years. However, the metatarsal of the Callao Man, reliably dated by uranium-series dating to 67,000 years ago remains the oldest human remnant found in the archipelago to date; this distinction belonged to the Tabon Man of Palawan, carbon-dated to around 26,500 years ago. Negritos were among the archipelago's earliest inhabitants, but their first settlement in the Philippines has not been reliably dated.
There are several opposing theories regarding the origins of ancient Filipinos. F. Landa Jocano theorizes. Wilhelm Solheim's Island Origin Theory postulates that the peopling of the archipelago transpired via trade networks originating in the Sundaland area around