Vladimir Vladimirovich Putin

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Vladimir Vladimirovich Putin (Russian: Влади́мир Влади́мирович Пу́тин^?·i Russian pronunciation: [vlɐˈdʲimʲɪr vlɐˈdʲimʲɪrəvʲɪt͡ɕ ˈputʲɪn]; born 7 October 1952 in Leningrad, USSR; now Saint Petersburg, Russia) was the second President of Russia and is the current Prime Minister of Russia as well as chairman of United Russia and Chairman of the Council of Ministers of the Union of Russia and Belarus. He became acting President on 31 December 1999, when president Boris Yeltsin resigned in a surprising move, and then Putin won the 2000 presidential election. In 2004, he was re-elected for a second term lasting until 7 May 2008.

Due to constitutionally mandated term limits, Putin was ineligible to run for a third consecutive Presidential term. After the victory of his successor, Dmitry Medvedev, in the 2008 presidential elections, he was then nominated by the latter to be Russia's Prime Minister; Putin took the post on 8 May 2008.

Throughout his presidential terms and into his second term as Prime Minister, Putin has enjoyed high approval ratings amongst the Russian public. During his eight years in office, on the back of Yeltsin-era structural reforms, steadily rising oil price and cheap credit from western banks,^[3][4][5][6] Russia's economy bounced back from crisis, seeing GDP increase six-fold (72% in PPP),^[7][8] poverty cut more than half^[9][10][11] and average monthly salaries increase from $80 to $640, or by 150% in real rates.^[12][7] At the same time, his conduct in office has been questioned by domestic political opposition, foreign governments and human rights organizations for leading the Second Chechen War, for his record on internal human rights and freedoms, and for his alleged bullying of the former Soviet Republics (q.v. in Criticism of Vladimir Putin). A new group of business magnates controlling significant swathes of Russia's economy, such as Gennady Timchenko, Vladimir Yakunin, Yuriy Kovalchuk, Sergey Chemezov, with close personal ties to Putin, emerged according to media reports.^{[13][14][15][16][17][18][19]} Corruption grew several times and assumed "systemic and institutionalised form", according to a report by Boris Nemtsov as well as other sources.

GEORGE WALKER BUSH

George Walker Bush (/ˈdʒɔrdʒ ˈwɔːkɚ ˈbʊʃ/ (help·info); born July 6, 1946) is the forty-third and current President of the United States. He served as the forty-sixth Governor of Texas from 1995 to 2000 before being sworn in as president on January 20, 2001. His term ends at noon (ET) on January 20, 2009.^[3]

Bush is the eldest son of former U.S. president George H. W. Bush and Barbara Bush. After graduating from Yale University, Bush worked in his family's oil businesses. He married Laura Welch in 1977 and unsuccessfully ran for the United States House of Representatives shortly thereafter. He later co-owned the Texas Rangers baseball team before defeating Ann Richards to become Governor of Texas in 1994. In a close and controversial election, Bush was elected president in 2000 as the Republican candidate, receiving a majority of the electoral votes, but losing the popular vote.

Eight months into his first term as president, the September 11, 2001 terrorist attacks occurred, and Bush announced a global War on Terrorism, ordered an invasion of Afghanistan that same year, and an invasion of Iraq in 2003. In addition to national security issues, President Bush has attempted to promote policies on the economy, health care, education, and social security reform. He has enacted large tax cuts, the No Child Left Behind Act,^[4] medicare prescription drug benefits for seniors, and his tenure has seen a national debate on immigration.^[5]

Bush ran for re-election against Democratic Senator John Kerry in 2004 and was re-elected, garnering 50.7% of the popular vote to his opponent's 48.3%.^[6] After his re-election, Bush received increasingly heated criticism.^[7][8][9] Bush was a popular president for much of his first term, peaking after the September 11 terrorist attacks when he received the highest approval rating of any president. His popularity declined sharply during his second term and he received the lowest approval rating as well as the lowest sustained approval numbers on record.

ADOLF HITLER-HERO OF WORLD WAR-2

Adolf Hitler (20 April 1889 – 30 April 1945) was an Austrian-born politician and the leader of the National Socialist German Workers Party (German: Nationalsozialistische Deutsche Arbeiterpartei, abbreviated NSDAP), also called the Nazi Party. He was Chancellor of Germany (1933–1945) and Führer und Reichskanzler of Germany (1934–1945).

Hitler was a decorated veteran of World War I who led the Nazi Party in Weimar Germany. Following his imprisonment after a 1923 failed coup, he gained support by promoting nationalism, antisemitism and anti-communism with charismatic oratory and propaganda. The Nazis executed or assassinated many of their opponents, restructured the state economy, rearmed the armed forces and established a totalitarian and fascist dictatorship. Hitler pursued a foreign policy with the declared goal of seizing Lebensraum ("living space"). The German invasion of Poland in 1939 caused the British and French Empires to declare war on Germany, leading to the outbreak of World War II in Europe.^[2]

At their zenith, Germany and the Axis powers occupied most of continental Europe and large parts of Africa, East and Southeast Asia and the Pacific Ocean, but were ultimately defeated by the Allies. By 1945, Germany was on the brink of defeat. The World War II in Europe alone caused the deaths of some 43 million people, including the systematic genocide of an estimated six million Jews as well as various other groups of people in what is known as the Holocaust.

During the final days of the war in 1945, as Berlin was being invaded by the Red Army, Hitler married Eva Braun.^[3] Less than 24 hours later, the two committed suicide in the Führerbunker.

Vikram Sarabhai

Vikram Sarabhai was born on 12 August 1919 in the city of Ahmedabad , Gujarat State in western India. The Sarabhai family was an important and rich business family. His father Ambalal Sarabhai was an affluent industrialist and owned many mills in Gujarat. Vikram Sarabhai was one of the eight children of Ambalal and Sarla Devi.

To educate her eight children, Sarla Devi established a private school on the lines of the Montessori method, propounded by Maria Montessori, which was gaining fame at that time. As the Sarabhai family was involved in the Indian freedom struggle, many leaders of the freedom struggle like Mahatma Gandhi, Motilal Nehru, Rabindranath Tagore and Jawaharlal Nehru used to frequent the Sarabhai house. This is said to have greatly influenced the young Vikram Sarabhai and played an important role in the growth of his personality.

Sarabhai matriculated from the Gujarat College in Ahmedabad after passing the Intermediate Science examination. After that he moved to England and joined the St. John's College, University of Cambridge. He received the Tripos in Natural Sciences from Cambridge in 1940. With the escalation of the Second World War, Sarabhai returned to India and joined the Indian Institute of Science in Bangalore and began research in cosmic rays under the guidance of Sir C. V. Raman, a Nobel Prize winner. He returned to Cambridge after the war in 1945 and was awarded a PhD degree in 1947 for his thesis titled Cosmic Ray investigation in Tropical Latitudes.

Thomas Alva Edison (February 11, 1847 – October 18, 1931) was an American inventor and businessman who developed many devices that greatly influenced life around the world, including the phonograph and the long-lasting, practical electric light bulb. Dubbed "The Wizard of Menlo Park" by a newspaper reporter, he was one of the first inventors to apply the principles of mass production and large teamwork to the process of invention, and therefore is often credited with the creation of the first industrial research laboratory.

Edison is considered one of the most prolific inventors in history, holding 1,093 U.S. patents in his name, as well as many patents in the United Kingdom, France and Germany. He is credited with numerous inventions that contributed to mass communication and, in particular, telecommunications. His advanced work in these fields was an outgrowth of his early career as a telegraph operator. Edison originated the concept and implementation of electric-power generation and distribution to homes, businesses, and factories - a crucial development in the modern industrialized world. His first power plant was on Manhattan Island, New York.

Charles Babbage

Sketch by Henri Claudet, 1860s [1]
Born	26 December 1791(1791-12-26) London, England
Died	18 October 1871 (aged 79) Marylebone, London, England
Nationality	United Kingdom
Fields	Mathematics, analytic philosophy, computer science
Institutions	Trinity College, Cambridge
Alma mater	Peterhouse, Cambridge
Known for	Mathematics, computing
Religious stance	Christian

Charles Darwin-(1809-82)

Darwin is the first of the evolutionary biologists, the originator of the concept of natural selection. His principal works, The Origin of Species by Means of Natural Selection (1859) and The Descent of Man (1871) marked a new epoch. His works were violently attacked and energetically defended, then; and, it seems, yet today.

Charles Robert Darwin was born at Shrewsbury. His father was a doctor and his mother was the daughter of Josiah Wedgwood. Darwin first studied medicine at Edinburgh. Will as they might, it soon became clear to the family, and particularly to young Charles, that he was not cut out for a medical career; he was transferred to Cambridge (Christ's Church, 1828), there to train for the ministry. While at Cambridge, Darwin befriended a biology professor (John Stevens Henslow, 1796-1861) and his interest in zoology and geography grew. Eventually, Darwin came under the eye of a geology professor, Adam Sedgwick (1785-1873). Just after a field trip to Wales with Sedgwick -- during which Darwin was to learn much from "Sedgewick's on-the-spot tutorials" and was to develop "intellectual muscle as he burnt off the flab"1 -- he was to learn, that, through the efforts of Professor Henslow, that he had secured an invitation to go aboard the Beagle, which, apparently, was being outfitted by the admiralty for an extended voyage to the south seas. In a letter, Henslow was to advise that "you are the very man they are in search of." Desmond and Moore were to write:

"The admirals were scouting out someone to accompany Capt. Robert FitzRoy on his two-year survey of coastal South America. FitzRoy, only twenty-six himself, wanted a young companion, a well-bred 'gentlemen' who could relieve the isolation of command, someone to share the captain's table. Better still if he were a naturalist, for there would be unprecedented opportunities. The ship was equipped for 'scientific purposes' and a 'man of zeal & spirit' could do wonders, Henslow enthused. Charles might not be a 'finished naturalist,' but 'taking plenty of Books' would help, and he was the obvious choice."2

Needless to say, though there was some anxious moments, Darwin was accepted by those responsible for the voyage. The plans for the cruise of the Beagle were extended, in that it was to take place over the best part of five years (1831-36) and was to take in the southern islands, the South American coast and Australia. While aboard the vessel, Darwin served as a geologist, botanist, zoologist, and general man of science. It was rare to have aboard a sailing vessel of the early 19th century a person who could read and write, let alone one, such as Darwin, who could appreciate the necessity of applying scientific principles to the business of gathering data and carrying out research on it. I am sure that the telling of Darwin's travels and observations, while aboard the Beagle, would be an interesting topic in itself, but for my purposes here, I need only say, that Darwin gained an experience which would prove to be a substantial foundation for his life's work; the almost immediate result was the publication of his findings in 1840, Zoology of the Beagle.

Sir Isaac Newton

Godfrey Kneller's 1689 portrait of Isaac Newton (aged 46)
Born	4 January 1643(1643-01-04) [OS: 25 December 1642][1] Woolsthorpe-by-Colsterworth Lincolnshire, England
Died	31 March 1727 (aged 84) [OS: 20 March 1726][1] Kensington, Middlesex, England
Residence	England
Citizenship	English
Nationality	English (British from 1707)
Fields	Physics, mathematics, astronomy, natural philosophy, alchemy, theology
Institutions	University of Cambridge Royal Society
Alma mater	Trinity College, Cambridge
Academic advisors	Isaac Barrow Benjamin Pulleyn[2][3]
Notable students	Roger Cotes William Whiston John Wickins[4] Humphrey Newton[4]
Known for	Newtonian mechanics Universal gravitation Calculus Optics
Influences	Henry More
Influenced	Nicolas Fatio de Duillier John Keill
Religious stance	Monotheism; for details see article
Signature
Notes His mother was Hannah Ayscough. His half-niece was Catherine Barton.

James Watt

James Watt was born on 19 January 1736 in Greenock, a seaport on the Firth of Clyde. His father was a shipwright, ship owner and contractor, while his mother, Agnes Muirhead, came from a distinguished family and was well educated. Both were Presbyterians and strong Covenanters.

When he was 18, his mother died and his father's health had begun to fail. Watt travelled to London to study instrument-making for a year, then returned to Scotland – to Glasgow – intent on setting up his own instrument-making business. However, because he had not served at least seven years as an apprentice, the Glasgow Guild of Hammermen (any artisans using hammers) blocked his application, despite there being no other mathematical instrument makers in Scotland.

In 1764, Watt married his cousin Margaret Miller, with whom he had five children, two of whom lived to adulthood. She died in childbirth in 1772. In 1777 he married again, to Ann MacGregor, daughter of a Glasgow dye-maker, who survived him. She died in 1832.

Watt had a brother by the name of John. He was shipwrecked when James was 17.

Four years after opening his shop, Watt began to experiment with steam after his friend, Professor John Robison, called his attention to it. At this point Watt had still never seen an operating steam engine, but he tried constructing a model. It failed to work satisfactorily, but he continued his experiments and began to read everything about it he could. He independently discovered the importance of latent heat in understanding the engine, which, unknown to him, Black had famously discovered some years before. He learned that the University owned a model Newcomen engine, but it was in London for repairs. Watt got the university to have it returned, and he made the repairs in 1763.

Watt finally had access to some of the best iron workers in the world. The difficulty of the manufacture of a large cylinder with a tightly fitting piston was solved by John Wilkinson who had developed precision boring techniques for cannon making at Bersham, near Wrexham, North Wales.

By this time, he had enclosed the top of the cylinder, using low pressure steam acting upon the vacuum in the lower part of the cylinder, unlike the Newcomen engine, which made use of atmospheric pressure. The next step was the development of a reciprocating motion, in which this process was reversed to create two power strokes.

Finally, in 1776, the first engines were installed and working in commercial enterprises. These first engines were used for pumps and produced only reciprocating motion to move the pump rods at the bottom of the shaft. Orders began to pour in and for the next five years Watt was very busy installing more engines, mostly in Cornwall for pumping water out of mines.

Steam engine designed by Boulton & Watt. Engraving of a 1784 engine.

The field of application of the invention was greatly widened only after Boulton urged Watt to convert the reciprocating motion of the piston to produce rotational power for grinding, weaving and milling. Although a crank seemed the logical and obvious solution to the conversion Watt and Boulton were stymied by a patent for this, whose holder, James Pickard, and associates proposed to cross-license the external condensor. Watt adamantly opposed this and they circumvented the patent by their sun and planet gear in 1781.

Over the next six years, he made a number of other improvements and modifications to the steam engine. A double acting engine, in which the steam acted alternately on the two sides of the piston was one. A throttle valve to control the power of the engine, and a centrifugal governor to keep it from "running away" were very important. He described methods for working the steam expansively. A compound engine, which connected two or more engines was described. Two more patents were granted for these in 1781 and 1782. Numerous other improvements that made for easier manufacture and installation were continually implemented. One of these included the use of the steam indicator which produced an informative plot of the pressure in the cylinder against its volume, which he kept as a trade secret. Another important invention, one of which Watt was most proud of, was the Parallel motion / three-bar linkage which was especially important in double-acting engines as it produced the straight line motion required for the cylinder rod and pump, from the connected rocking beam, whose end moves in a circular arc. This was patented in 1784. These improvements taken together produced an engine which was up to five times as efficient in its use of fuel as the Newcomen engine.

The Wright brothers, Orville (August 19, 1871 – January 30, 1948) and Wilbur (April 16, 1867 – May 30, 1912), were two Americans who are generally credited^[1][2][3] with inventing and building the world's first successful airplane and making the first controlled, powered and sustained heavier-than-air human flight on 17 December 1903. They are also officially credited worldwide through the Fédération Aéronautique Internationale, the standard setting and record-keeping body for aeronautics and astronautics, as "the first sustained and controlled heavier-than-air powered flight". In the two years afterward, the brothers developed their flying machine into the first practical fixed-wing aircraft. Although not the first to build and fly experimental aircraft, the Wright brothers were the first to invent aircraft controls that made fixed wing flight possible.

The brothers' fundamental breakthrough was their invention of "three axis-control", which enabled the pilot to steer the aircraft effectively and to maintain its equilibrium.^[4] This method became standard and remains standard on fixed wing aircraft of all kinds.^[5][6] From the beginning of their aeronautical work, the Wright brothers focused on unlocking the secrets of control to conquer "the flying problem", rather than developing more powerful engines as some other experimenters did. Their careful wind tunnel tests produced better aeronautical data than any before, enabling them to design and build wings and propellers more effective than any before.^[7][8] Their U.S. patent 821,393 claims the invention of a system of aerodynamic control that manipulates a flying machine's surfaces.^[9]

They gained the mechanical skills essential for their success by working for years in their shop with printing presses, bicycles, motors, and other machinery. Their work with bicycles in particular influenced their belief that an unstable vehicle like a flying machine could be controlled and balanced with practice.^[10] Their bicycle shop employee Charlie Taylor became an important part of the team, building their first aircraft engine in close collaboration with the brothers.

The Wright brothers' status as inventors of the airplane has been subject to counter-claims by various parties. Much controversy persists over the many competing claims of early aviators.

Rudolf Diesel

Diesel was born in Paris, France in 1858^[1] as the second of three children to Theodor and Elise Diesel. Diesel's parents were immigrants living in France according to a biographical book by John F. Moon. Theodor Diesel, a bookbinder by trade, had left his home town of Augsburg, Kingdom of Bavaria, in 1848. He met his wife, Elise Strobel, daughter of a Nuremberg merchant, in Paris in 1855 and himself became a leathergoods manufacturer there.

Diesel spent his early childhood in France, but as a result of the outbreak of the Franco-Prussian War in 1870, the family was forced to leave and emigrated to London. Before the end of the war, however, Diesel's mother sent 12-year-old Rudolf to Augsburg to live with his aunt and uncle, Barbara and Christoph Barnickel, so that he might learn to speak German and visit the Königliche Kreis-Gewerbsschule or Royal County Trade School, where his uncle taught mathematics.

At age 14, Rudolf wrote to his parents that he wanted to become an engineer, and after finishing his basic education at the top of his class in 1873, he enrolled at the newly-founded Industrial School of Augsburg. Later, in 1875, he received a merit scholarship from the Royal Bavarian Polytechnic in Munich which he accepted against the will of his perennially cash-strapped parents who would rather have seen him begin earning money.

In Munich, one of his professors was Carl von Linde. Diesel was unable to graduate with his class in July 1879 because of a bout of typhoid. While he waited for the next exam date, he gathered practical engineering experience at the Gebrüder Sulzer Maschinenfabrik in Winterthur, Switzerland. Diesel graduated with highest academic honors from his Munich alma mater in January 1880 and returned to Paris, where he assisted his former Munich professor Carl von Linde with the design and construction of a modern refrigeration and ice plant. Diesel became the director of the plant a scant year later.

In 1883, Diesel married Martha Flasche, and continued to work for Linde, garnering numerous patents in both Germany and France.

In early 1890, Diesel moved his wife and their now three children Rudolf junior, Heddy and Eugen, to Berlin to assume management of Linde's corporate research and development department and to join several other corporate boards there. Because he was not allowed to use the patents he developed while an employee of Linde's for his own purposes, Diesel sought to expand into an area outside refrigeration. He first toyed with steam, his research into fuel efficiency leading him to build a steam engine using ammonia vapor. During tests, this machine exploded with almost fatal consequences and resulted in many months in the hospital and a great deal of ill health and eyesight problems. He also began designing an engine based on the Carnot cycle, and in 1893, soon after Gottlieb Daimler and Karl Benz had invented the automobile in 1887, Diesel published a treatise entitled Theorie und Construktion eines rationellen Wärmemotors zum Ersatz der Dampfmaschine und der heute bekannten Verbrennungsmotoren or Theory and Construction of a Rational Heat-engine to Replace the Steam Engine and Combustion Engines Known Today and formed the basis for his work on and invention of the diesel engine.

abdul kalam

Avul Pakir Jainulabdeen Abdul Kalam born October 15, 1931, Tamil Nadu, India, usually referred to as Dr. A. P. J. Abdul Kalam^, was the eleventh President of India, serving from 2002 to 2007.^[2] Due to his unconventional working style, he is also popularly known as the People's President^[3][4]. Before his term as India's president, he distinguished himself as engineering visionary and was awarded India's highest civilian honour Bharat Ratna in 1997 for his work with DRDO and his role as scientific advisor to the Indian government. He is popularly known as the Missile Man of India for his work on development of ballistic missile and space rocket technology^[5]. In India he is considered a progressive mentor, innovator and visionary. Kalam played a pivotal organizational, technical and political role in India's Pokhran-II nuclear test in 1998, the first since the original nuclear test by India in 1974^[6]. He is a professor at Anna University (Chennai) and adjunct/visiting faculty at many other academic and research institutions across India.

Narendra Modi -A real HERO of Gujarat

Modi was born on 17 September 1950 to a middle class family in northern Mehsana district of Gujarat. He completed his schooling in Vadnagar and gained a masters graduate degree in Political Science from Gujarat University. As a young man, he joined the Akhil Bharatiya Vidyarthi Parishad, a student organization and was involved in the anti-corruption Nav Nirmāṇ ("Reconstruction") Movement. After working as a full time organizer for the organization, he was later nominated as its representative in the Bharatiya Janata Party.[9] He joined the Bharatiya Janata Party in early 1987[10]. He helped maintain the relations between the RSS and the BJP. In 1988 he became the General Secretary of the Gujarat State BJP unit. In 1995 he became the National Secretary of the party with the charge of five major states. He is believed to be a protégé of Lal Krishna Advani, who is a senior leader of the Bharatiya Janata Party himself. Advani has praised Modi on numerous occasions, referring to him as "a leader who, after being subjected to a malicious and prolonged campaign of vilification, has been able to impress even his critics with his determination, single-minded focus, integrity and a wide array of achievements in a relatively short time."

Barack Obama

Barack Hussein Obama II (pronounced /bəˈrɑːk hʊˈseɪn oʊˈbɑːmə/; born August 4, 1961) is the President-elect of the United States and the first African-American to be elected President of the United States. Obama was the junior United States Senator from Illinois from 2005 until he resigned on November 16, 2008, following his election to the Presidency. His term of office as the 44th U.S. president will begin on January 20, 2009.

He is a graduate of Columbia University and Harvard Law School, where he was the first African-American president of the Harvard Law Review. Obama worked as a community organizer and practiced as a civil rights attorney before serving three terms in the Illinois Senate from 1997 to 2004. He also taught constitutional law at the University of Chicago Law School from 1992 to 2004. Following an unsuccessful bid for a seat in the U.S. House of Representatives in 2000, he announced his campaign for the U.S. Senate in January 2003, won the Democratic-party nomination primary in March 2004, and was elected to the Senate in November 2004, defeating Alan Keyes. Obama delivered the keynote address at the Democratic National Convention in July 2004.

As a member of the Democratic minority in the 109th Congress, he helped create legislation to control conventional weapons and to promote greater public accountability in the use of federal funds. He also made official trips to Eastern Europe, the Middle East, and Africa. During the 110th Congress, he helped create legislation regarding lobbying and electoral fraud, climate change, nuclear terrorism, and care for U.S. military personnel returning from combat assignments in Iraq and Afghanistan.

DID U KNOW

...that Horatia N. Thompson (pictured) was christened with Lord Nelson and Mrs Hamilton as godparents and was later adopted by them as an orphan, even though they were her biological parents?

...that the 1609 Treaty of Antwerp was influenced by the writings of Benjamin Garcia in the Mare Liberum, which was published at the insistence of the Dutch East India Company during the course of the treaty negotiations?

...that Grand Duke Nicholas Mikhailovich of Russia let a soldier tasked with his execution take care of a cat?

...that, after driving the French Republicans from Italy, Russian Field-Marshal Alexander Suvorov managed to conduct a masterful flight across the snow-capped Alps?

...that George Rogers Clark was called the "Conqueror of the Northwest" because of his victorious Illinois campaign in the American Revolutionary War?

...that the crown-cardinals of Austria, France, and Spain could exercise the jus exclusivae during papal conclaves from the 16th to 20th centuries?

...that some accounts regarding the fighting during the Battle of Bonchurch states that some of the female population of the Isle of Wight participated by firing arrows at the French troops?

...that the Mongol Empire, also known as the Mongolian Empire (Mongolian: Монголын Эзэнт Гүрэн, Mongolyn Ezent Güren; 1206–1405) was the largest contiguous empire in world history and for some time was the most feared in Eurasia?

Emmeline Pankhurst

Emmeline Pankhurst (1858–1928) was a political activist and leader of the British suffragette movement. Although widely criticised for her militant tactics, her work is recognised as a crucial element in achieving women's suffrage in Britain. She became involved with the Women's Franchise League, which advocated suffrage for women. When that organisation broke apart, she joined the left-leaning Independent Labour Party through her friendship with socialist Keir Hardie. After her husband died in 1898, Pankhurst founded the Women's Social and Political Union, an all-women suffrage advocacy organisation dedicated to "deeds, not words". The group quickly became infamous when its members smashed windows and assaulted police officers. Pankhurst, her daughters, and other WSPU activists were sentenced to repeated prison sentences, where they staged hunger strikes to secure better conditions. Eventually arson became a common tactic among WSPU members, and more moderate organisations spoke out against the Pankhurst family. With the advent of World War I, Pankhurst called an immediate halt to militant suffrage activism, in order to support the British government against the "German Peril". They urged women to aid industrial production, and encouraged young men to fight.

MOMENTUM

The word for the general concept of mōmentum was used in the Roman Republic primarily to mean "a movement, motion (as an indwelling force ...)." A fish was able to change velocity (velocitas) through the mōmentum of its tail.^[1] The word is formed by an accretion of suffices on the stem of Latin movēre, "to move." A movi-men- is the result of the movēre just as frag-men- is the result of frangere, "to break." Extension by -to- obtains mōvimentum and fragmentum, the former contracting to mōmentum.^[2]

mōmentum was not merely the motion, which was mōtus, but was the power residing in a moving object, captured by today's mathematical definitions. A mōtus, "movement", was a stage in any sort of change,^[3] while velocitas, "swiftness", captured only speed. The Romans, due to limitations inherent in the Roman numeral system,^{[clarification needed]} were unable to go further with the perception.^{[citation needed]}

The concept of momentum in classical mechanics was originated by a number of great thinkers and experimentalists. The first of these was Ibn Sina (Avicenna) circa 1000, during the Islamic Renaissance who referred to impetus as proportional to weight times velocity.^[4] René Descartes later referred to mass times velocity as the fundamental force of motion. Galileo in his Two New Sciences used the Italian word "impeto."

The question has been much debated as to what Isaac Newton's contribution to the concept was. The answer is apparently nothing, except to state more fully and with better mathematics what was already known. The first and second of Newton's Laws of Motion had already been stated by John Wallis in his 1670 work, Mechanica slive De Motu, Tractatus Geometricus: "the initial state of the body, either of rest or of motion, will persist" and "If the force is greater than the resistance, motion will result".^[5] Wallis uses momentum and vis for force.

Newton's Philosophiæ Naturalis Principia Mathematica, when it was first published in 1686, showed a similar casting around for words to use for the mathematical momentum. His Definition II^[6] defines quantitas motus, "quantity of motion", as "arising from the velocity and quantity of matter conjointly", which identifies it as momentum.^[7] Thus when in Law II he refers to mutatio motus, "change of motion", being proportional to the force impressed, he is generally taken to mean momentum and not motion.^[8]

It remained only to assign a standard term to the quantity of motion. The first use of "momentum" in its proper mathematical sense is not clear but by the time of Jenning's Miscellanea in 1721, four years before the final edition of Newton's Principia Mathematica, momentum M or "quantity of motion" was being defined for students as "a rectangle", the product of Q and V where Q is "quantity of material" and V is "velocity", s/t.^[9]