Archimedes (Greek: Αρχιμηδης ) (287 BC–212 BC) was an ancient mathematician, physicist, engineer, astronomer and philosopher born in the Greek seaport colony of Syracuse. He is considered by some math historians to be one of history's greatest mathematicians, along with possibly Newton, Gauss and Euler. Archimedes - Discoveries and inventions. Archimedes became a popular figure as a result of his involvement in the defense of Syracuse against the Roman siege in the First and Second Punic Wars. He ...

Including:

• Archimedes - Discoveries and inventions
• Archimedes - Writings by Archimedes
• Archimedes - Quotes about Archimedes
• Archimedes - Named after Archimedes
• Archimedes - Notes

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Archimedes is a large lunar impact crater on the eastern edges of the Mare Imbrium. To the south of the crater extends the Montes Archimedes mountainous region. On the southeastern rim is the Palus Putredinis flooded plain, containing a system of rilles named the Rimae Archimedes that extend over 150 kilometers. North-northwest of Archimedes stand the Montes Spitzbergen, a string of peaks in the Mare Imbrium. East of Archimedes is the Autolycus crater, and the stretch of lunar surface between these two formations was the crash-landing site of the Luna 2 landing craft. This was the first robotic craft to ...

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• Archimedes crater - Satellite craters

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The Archimedes Palimpsest[1] is a palimpsest on parchment in the form of a codex which originally was a copy of an otherwise unknown work of the ancient mathematician, physicist, and engineer Archimedes of Syracuse and other authors. Archimedes lived in the third century BC, but the copy was made in the 10th century by an anonymous scribe. In the 12th century the codex was unbound and washed, in order that the parchment leaves could be folded in half and reused for a Christian liturgical text. It was a book of nearly 90 pages before b ...

Including:

• Archimedes Palimpsest - What Archimedes did
• Archimedes Palimpsest - The palimpsest's modern career

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The claw of Archimedes was a war machine devised by Archimedes to defend the seaward portion of Syracuse's city wall against amphibious assault. Although its exact nature is unclear, the accounts of ancient historians seem to describe it as a sort of crane equipped with a grappling hook that was able to lift attacking ships partly out of the water, then either cause the ship to capsize or suddenly drop it. These machines featured prominently during the Second Punic War in 213 BC, when the Roman Republic attacked Syracuse with a ...

Including:

• Claw of Archimedes - External link

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Fire ant master of the magician's art, Archimedes is the mentor of Knuckles the Echidna. The latest in a long line of fire ants, Archy-as he is known-is the descendant of Christopheles, mentor and friend to Edmund and Steppenwolf, the original Guardians. Archimedes, like his ancestors and the Guardians, is long-lived, having served as mentor to Knuckles and his father Locke, among others. Archimedes is also one of the few residents o ...

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Minor characters in Sonic the Hedgehog Archie, Minor characters in Sonic the Hedgehog Archie - A.D.A.M. Auotonomous Digital Assault Microbe, Minor characters in Sonic the Hedgehog Archie - Queen Alicia Acorn, Minor characters in Sonic the Hedgehog Archie - Amadeus Prower, Minor characters in Sonic the Hedgehog Archie - Archimedes, Minor characters in Sonic the Hedgehog Archie - Arthur Mongoose, Minor characters in Sonic the Hedgehog Archie - Ash Mongoose, Minor characters in Sonic the Hedgehog Archie - Aurora, Minor characters in Sonic the Hedgehog Archie - Bernadette, Minor characters in Sonic the Hedgehog Archie - Ceneca 9009, Minor characters in Sonic the Hedgehog Archie - Uncle Chuck, Minor characters in Sonic the Hedgehog Archie - Croc Bot, Minor characters in Sonic the Hedgehog Archie - General D'Coolette, Minor characters in Sonic the Hedgehog Archie - Fiona Fox, Minor characters in Sonic the Hedgehog Archie - Councilor Gala-Na, Minor characters in Sonic the Hedgehog Archie - Geoffrey St. John, Minor characters in Sonic the Hedgehog Archie - Hershey the Cat, Minor characters in Sonic the Hedgehog Archie - Isaac, Minor characters in Sonic the Hedgehog Archie - Ixis Naugus, Minor characters in Sonic the Hedgehog Archie - Jules Hedgehog, Minor characters in Sonic the Hedgehog Archie - Kneecapeon Mace the Echidna, Minor characters in Sonic the Hedgehog Archie - Lara-Le, Minor characters in Sonic the Hedgehog Archie - Mammoth Mogul, Minor characters in Sonic the Hedgehog Archie - Mecha, Minor characters in Sonic the Hedgehog Archie - Merlin Prower, Minor characters in Sonic the Hedgehog Archie - Mobie, Minor characters in Sonic the Hedgehog Archie - Muttski, Minor characters in Sonic the Hedgehog Archie - Nate Morgan, Minor characters in Sonic the Hedgehog Archie - NICOLE, Minor characters in Sonic the Hedgehog Archie - Constable Remington, Minor characters in Sonic the Hedgehog Archie - Rob O' the Hedge, Minor characters in Sonic the Hedgehog Archie - Safron, Minor characters in Sonic the Hedgehog Archie - SWATbot, Minor characters in Sonic the Hedgehog Archie - Tommy Turtle, Minor characters in Sonic the Hedgehog Archie - Wynmacher the Echidna

Read more here: » Minor characters in Sonic the Hedgehog Archie: Encyclopedia II - Minor characters in Sonic the Hedgehog Archie - Archimedes

Archimedes became a popular figure as a result of his involvement in the defense of Syracuse against the fluff-cow siege in the First and Second Puniiic Wars. He is reputed to have held the Romans at bay with war machines of his own design; to have been able to move a full-size ship complete with crew and cargo by pulling a single rope[1]; to have discovered the principles of density and buoyancy, also known as Archimedes' principle, while taking a bath (thereupon taking to the streets naked calling "WAA WAA" - "I have found it!"); and to have i ...

See also:

Archimedes, Archimedes - Discoveries and inventions, Archimedes - Writings by Archimedes, Archimedes - Quotes about Archimedes, Archimedes - Named after Archimedes, Archimedes - Notes

Read more here: » Archimedes: Encyclopedia II - Archimedes - Discoveries and inventions

Archimedes' screw, or the Archimedean screw, is a simple machine historically used for transferring water from a low-lying body of water into irrigation ditches. It is one of several inventions and discoveries reputed to have been made by Archimedes, though writings about the Hanging Gardens of Babylon hint that a similar device was used by the Mesopotamians as early as 600 BC – over 300 years before his birth. Archimedes' screw - Workings. The machine consists of a screw inside a hollow pipe. The ...

Including:

• Archimedes' screw - Workings
• Archimedes' screw - Uses
• Archimedes' screw - Use in vehicle propulsion

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The Acorn Archimedes was Acorn Computers Ltd's first general purpose home computer based on their own 32-bit ARM RISC CPU, and spawned a family of very capable machines with various options. Acorn Archimedes - Description; Early models. The first models were released in June 1987, as the 300 and 400 series. The machines differed primarily in that the 400 series included more expansion slots (four instead of two) and a ST506 controller for an internal hard drive. Both models included the Arthur OS (later ver ...

Including:

• Acorn Archimedes - Description; Early models
• Acorn Archimedes - The A3000 and A5000
• Acorn Archimedes - A new range and a laptop
• Acorn Archimedes - Significance and impact

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An Archimedean spiral (also arithmetic spiral) is a curve which in polar coordinates (r, θ) can be described by the equation with real numbers a and b. Changing the parameter a will turn the spiral, while b controls the distance between the arms. This Archimedean spiral is distinguished from the logarithmic spiral by the fact that successive turnings of the spiral have a constant separation distance (equal to 2πb if θ is measured in radians), while in a logarit ...

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An Archimedes number (not to be confused with Archimedes constant, π), named after the ancient Greek scientist Archimedes, to determine the motion of fluids due to density differences, is a dimensionless number in the form: where: g = gravitational acceleration (9.81 m/s²), ρl = density of the fluid, ρ = density of ...

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In physics, buoyancy is an upward force on an object immersed in a fluid (i.e. a liquid or a gas), enabling it to float or at least to appear lighter. Buoyancy is important for many vehicles such as boats, ships, balloons, and airships. Buoyancy - Forces and equilibrium. The buoyancy provides an upward force on the object. According to Newton's first law of motion, if the upward forces (including the buoyancy) balance the downward forces (including the weight) the object will remain at rest. Otherwise, it w ...

Including:

• Buoyancy - Forces and equilibrium
• Buoyancy - Archimedes' Principle
• Buoyancy - Density
• Buoyancy - Acceleration
• Buoyancy - Links

Read more here: » Buoyancy: Encyclopedia - Buoyancy

Geometry (Greek γεωμετρία; geo = earth, metria = measure) arose as the field of knowledge dealing with spatial relationships. It was one of the two fields of pre-modern mathematics, the other being the study of numbers. In modern times, geometric concepts have been generalized to a high level of abstraction and complexity, and have been subjected to the methods of calculus and abstract algebra, so that many modern branches of the field are barely recognizable as the descendants of early geometry. (See areas of mathemat ...

Including:

• Geometry - The earliest geometry
• Geometry - The Greek period c. 600 B.C. – 600 A.D.
• Geometry - Thales and Pythagoras
• Geometry - Plato
• Geometry - Euclid
• Geometry - Archimedes
• Geometry - After Archimedes
• Geometry - The Middle Ages Renaissance and Reformation
• Geometry - The 17th and early 18th centuries
• Geometry - The late 18th and 19th centuries
• Geometry - Non-Euclidean geometry
• Geometry - Introduction of mathematical rigor
• Geometry - Analysis situs or topology
• Geometry - The 20th century

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Acorn Computers was a British computer company established in Cambridge, England, in 1978. The company produced a number of computers which were especially popular in the UK. These included the Acorn Electron, the BBC Micro and the Acorn Archimedes. Acorn's BBC Micro computer dominated the UK educational computer market during the 1980s and early 1990s, drawing many comparisons with Apple in the U.S. Though the company was broken up into several independent operations in 2000, it leaves an impressive legacy, particularly in the ...

Including:

• Acorn Computers - Prehistory
• Acorn Computers - CPU Ltd 1978–83
• Acorn Computers - The microcomputer systems
• Acorn Computers - The Atom
• Acorn Computers - BBC Micro and the Electron
• Acorn Computers - Acorn Computer Group plc 1983–85
• Acorn Computers - New RISC architecture
• Acorn Computers - Financial problems
• Acorn Computers - Olivetti subsidiary 1985–98
• Acorn Computers - BBC Master and Archimedes
• Acorn Computers - ARM Ltd
• Acorn Computers - Set-Top boxes
• Acorn Computers - Network Computers
• Acorn Computers - Final break up of Acorn 1998–2000
• Acorn Computers - Footnotes

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In mathematics, an Archimedean field is an ordered field with the Archimedean property, named after the ancient Greek mathematician Archimedes of Syracuse. In an ordered field F we can define the absolute value of an element x in F in the usual way by setting |x| = x for nonnegative x and |x| = −x for negative x. Then, an Archimedean field F is one such that for any x in F there exists n in the natu ...

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A pump is a mechanical device used to move liquids or gases. A pump moves liquids or gases from a lower pressure to a higher pressure and is responsible for this difference in pressure. The earliest pump was described by Archimedes in the 3rd century BC and is known as the Archimedes screw pump. Pumps work by using mechanical forces to push the material, either by physically lifting, or by the force of compression. Pump - Types. Pumps fall into two categories: positive displacement pump ...

Including:

• Pump - Types
• Pump - Positive displacement pump
• Pump - Dynamic pump
• Pump - Jet Pumps

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212 BC - Events. Second Punic War: In the First Battle of Capua, Hannibal defeats the consuls Quintus Fulvius Flaccus and Appius Claudius, but the Roman army escapes, and soon reestablished the siege once again. Hannibal destroys the army of the Roman praetor Marcus Centenius Penula in the battle of the Silarus, then destroys the Roman army of the praetor Gnaeus Fulvius in the First battle of Herdonia, both Roman generals were killed. The Romans take Syracuse, in which Archimedes ...

Including:

• 212 BC - Events
• 212 BC - Births
• 212 BC - Deaths

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The BBC Micro, affectionately known as the Beeb, was an early home computer. It was designed and built by Acorn Computers Ltd for the British Broadcasting Corporation (BBC). In the early 1980s, the BBC started what became known as the BBC Computer Literacy Project. The project was initiated largely in response to an extremely influential BBC documentary The Mighty Micro, in which Dr. Christopher Evans from the National Physical Laboratory predicted the coming (micro)computer revolution and its impact on the ...

Including:

• BBC Micro - Background
• BBC Micro - Market impact
• BBC Micro - Description
• BBC Micro - Hardware features Models A and B
• BBC Micro - Software and expandability
• BBC Micro - Successor machines and the retro scene
• BBC Micro - Specifications
• BBC Micro - Trivia

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A burning-glass is a large convex lens, which can focus the sun's rays on a small area and so ignite materials. Used in 18th century chemical studies for burning materials in closed glass vessels where the products of combustion could be trapped for analysis, the burning-glass was a useful contrivance in the days before electrical ignition was easily achieved. The technology of the burning glass has been known since antiquity. Aristophanes mentions the burning-lens in his play The Clouds (424 BC), and Archimedes, the ren ...

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An Archimedean point is a hypothetical vantage point from which an observer can objectively perceive the subject of inquiry, with a view of totality. The ideal of "removing oneself" from the object of study so that one can see it in relation to all other things, but remain independent of them, is described by a view from an Archimedean point. The expression comes from Archimedes, who supposedly claimed that he could lift the Earth off its foundation if he were given a p ...

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