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MythBusters also pointed out that conventional weaponry, such as flaming arrows or bolts from a catapult, would have been a far easier way of setting a ship on fire at short distances.
In December , MythBusters again looked at the heat ray story in a special edition entitled " President's Challenge ".
The show concluded that a more likely effect of the mirrors would have been blinding, dazzling , or distracting the crew of the ship.
While Archimedes did not invent the lever , he gave an explanation of the principle involved in his work On the Equilibrium of Planes.
Earlier descriptions of the lever are found in the Peripatetic school of the followers of Aristotle , and are sometimes attributed to Archytas.
The odometer was described as a cart with a gear mechanism that dropped a ball into a container after each mile traveled. After the capture of Syracuse c.
Cicero mentions similar mechanisms designed by Thales of Miletus and Eudoxus of Cnidus. The dialogue says that Marcellus kept one of the devices as his only personal loot from Syracuse, and donated the other to the Temple of Virtue in Rome.
Marcellus' mechanism was demonstrated, according to Cicero, by Gaius Sulpicius Gallus to Lucius Furius Philus , who described it thus:  .
Hanc sphaeram Gallus cum moveret, fiebat ut soli luna totidem conversionibus in aere illo quot diebus in ipso caelo succederet, ex quo et in caelo sphaera solis fieret eadem illa defectio, et incideret luna tum in eam metam quae esset umbra terrae, cum sol e regione.
When Gallus moved the globe, it happened that the Moon followed the Sun by as many turns on that bronze contrivance as in the sky itself, from which also in the sky the Sun's globe became to have that same eclipse, and the Moon came then to that position which was its shadow on the Earth, when the Sun was in line.
This is a description of a planetarium or orrery. Pappus of Alexandria stated that Archimedes had written a manuscript now lost on the construction of these mechanisms entitled On Sphere-Making.
Modern research in this area has been focused on the Antikythera mechanism , another device built c. While he is often regarded as a designer of mechanical devices, Archimedes also made contributions to the field of mathematics.
Plutarch wrote: "He placed his whole affection and ambition in those purer speculations where there can be no reference to the vulgar needs of life.
Archimedes was able to use infinitesimals in a way that is similar to modern integral calculus. Through proof by contradiction reductio ad absurdum , he could give answers to problems to an arbitrary degree of accuracy, while specifying the limits within which the answer lay.
In Measurement of a Circle , he did this by drawing a larger regular hexagon outside a circle then a smaller regular hexagon inside the circle, and progressively doubling the number of sides of each regular polygon , calculating the length of a side of each polygon at each step.
As the number of sides increases, it becomes a more accurate approximation of a circle. In On the Sphere and Cylinder , Archimedes postulates that any magnitude when added to itself enough times will exceed any given magnitude.
This is the Archimedean property of real numbers. The actual value is approximately 1. He introduced this result without offering any explanation of how he had obtained it.
This aspect of the work of Archimedes caused John Wallis to remark that he was: "as it were of set purpose to have covered up the traces of his investigation as if he had grudged posterity the secret of his method of inquiry while he wished to extort from them assent to his results.
If the first term in this series is the area of the triangle, then the second is the sum of the areas of two triangles whose bases are the two smaller secant lines , and so on.
In The Sand Reckoner , Archimedes set out to calculate the number of grains of sand that the universe could contain.
In doing so, he challenged the notion that the number of grains of sand was too large to be counted. He wrote:.
There are some, King Gelo Gelo II, son of Hiero II , who think that the number of the sand is infinite in multitude; and I mean by the sand not only that which exists about Syracuse and the rest of Sicily but also that which is found in every region whether inhabited or uninhabited.
To solve the problem, Archimedes devised a system of counting based on the myriad. He proposed a number system using powers of a myriad of myriads million, i.
The works of Archimedes were written in Doric Greek , the dialect of ancient Syracuse. Pappus of Alexandria mentions On Sphere-Making and another work on polyhedra , while Theon of Alexandria quotes a remark about refraction from the now-lost Catoptrica.
The writings of Archimedes were first collected by the Byzantine Greek architect Isidore of Miletus c. There are two volumes to On the Equilibrium of Planes : the being is in fifteen propositions with seven postulates , while the second book is in ten propositions.
In this work Archimedes explains the Law of the Lever , stating, " Magnitudes are in equilibrium at distances reciprocally proportional to their weights.
Archimedes uses the principles derived to calculate the areas and centers of gravity of various geometric figures including triangles , parallelograms and parabolas.
This is a short work consisting of three propositions. It is written in the form of a correspondence with Dositheus of Pelusium, who was a student of Conon of Samos.
This work of 28 propositions is also addressed to Dositheus. The treatise defines what is now called the Archimedean spiral. It is the locus of points corresponding to the locations over time of a point moving away from a fixed point with a constant speed along a line which rotates with constant angular velocity.
This is an early example of a mechanical curve a curve traced by a moving point considered by a Greek mathematician. In this two-volume treatise addressed to Dositheus, Archimedes obtains the result of which he was most proud, namely the relationship between a sphere and a circumscribed cylinder of the same height and diameter.
The sphere has a volume two-thirds that of the circumscribed cylinder. Similarly, the sphere has an area two-thirds that of the cylinder including the bases.
A sculpted sphere and cylinder were placed on the tomb of Archimedes at his request. This is a work in 32 propositions addressed to Dositheus.
In this treatise Archimedes calculates the areas and volumes of sections of cones , spheres, and paraboloids. In the first part of this two-volume treatise, Archimedes spells out the law of equilibrium of fluids, and proves that water will adopt a spherical form around a center of gravity.
This may have been an attempt at explaining the theory of contemporary Greek astronomers such as Eratosthenes that the Earth is round. The fluids described by Archimedes are not self-gravitating , since he assumes the existence of a point towards which all things fall in order to derive the spherical shape.
In the second part, he calculates the equilibrium positions of sections of paraboloids. This was probably an idealization of the shapes of ships' hulls.
Some of his sections float with the base under water and the summit above water, similar to the way that icebergs float. Archimedes' principle of buoyancy is given in the work, stated as follows:.
Any body wholly or partially immersed in a fluid experiences an upthrust equal to, but opposite in sense to, the weight of the fluid displaced. Also known as Loculus of Archimedes or Archimedes' Box ,  this is a dissection puzzle similar to a Tangram , and the treatise describing it was found in more complete form in the Archimedes Palimpsest.
Archimedes calculates the areas of the 14 pieces which can be assembled to form a square. Research published by Dr. Reviel Netz of Stanford University in argued that Archimedes was attempting to determine how many ways the pieces could be assembled into the shape of a square.
Netz calculates that the pieces can be made into a square 17, ways. This work was discovered by Gotthold Ephraim Lessing in a Greek manuscript consisting of a poem of 44 lines, in the Herzog August Library in Wolfenbüttel , Germany in It is addressed to Eratosthenes and the mathematicians in Alexandria.
Archimedes challenges them to count the numbers of cattle in the Herd of the Sun by solving a number of simultaneous Diophantine equations.
There is a more difficult version of the problem in which some of the answers are required to be square numbers. This version of the problem was first solved by A.
Amthor  in , and the answer is a very large number , approximately 7. In this treatise, also known as Psammites , Archimedes counts the number of grains of sand that will fit inside the universe.
This book mentions the heliocentric theory of the solar system proposed by Aristarchus of Samos , as well as contemporary ideas about the size of the Earth and the distance between various celestial bodies.
The introductory letter states that Archimedes' father was an astronomer named Phidias. The Sand Reckoner is the only surviving work in which Archimedes discusses his views on astronomy.
This treatise was thought lost until the discovery of the Archimedes Palimpsest in In this work Archimedes uses infinitesimals , and shows how breaking up a figure into an infinite number of infinitely small parts can be used to determine its area or volume.
Archimedes may have considered this method lacking in formal rigor, so he also used the method of exhaustion to derive the results.
Archimedes' Book of Lemmas or Liber Assumptorum is a treatise with fifteen propositions on the nature of circles.
The earliest known copy of the text is in Arabic. The scholars T. Heath and Marshall Clagett argued that it cannot have been written by Archimedes in its current form, since it quotes Archimedes, suggesting modification by another author.
The Lemmas may be based on an earlier work by Archimedes that is now lost. It has also been claimed that Heron's formula for calculating the area of a triangle from the length of its sides was known to Archimedes.
The foremost document containing the work of Archimedes is the Archimedes Palimpsest. In , the Danish professor Johan Ludvig Heiberg visited Constantinople and examined a page goatskin parchment of prayers written in the 13th century AD.
He discovered that it was a palimpsest , a document with text that had been written over an erased older work.
Palimpsests were created by scraping the ink from existing works and reusing them, which was a common practice in the Middle Ages as vellum was expensive.
The older works in the palimpsest were identified by scholars as 10th century AD copies of previously unknown treatises by Archimedes.
The palimpsest holds seven treatises, including the only surviving copy of On Floating Bodies in the original Greek.
It is the only known source of The Method of Mechanical Theorems , referred to by Suidas and thought to have been lost forever.
Stomachion was also discovered in the palimpsest, with a more complete analysis of the puzzle than had been found in previous texts.
The palimpsest is now stored at the Walters Art Museum in Baltimore , Maryland , where it has been subjected to a range of modern tests including the use of ultraviolet and x-ray light to read the overwritten text.
From Wikipedia, the free encyclopedia. Greek mathematician, physicist, engineer, inventor, and astronomer. For other uses, see Archimedes disambiguation.
Archimedes Thoughtful by Domenico Fetti Syracuse, Sicily , Magna Graecia. Archimedes' principle Archimedes' screw hydrostatics levers infinitesimals Neuseis constructions .
Mathematics Physics Engineering Astronomy Invention. Main article: Archimedes' principle. Play media. Main article: Archimedes' screw. Main article: On the Equilibrium of Planes.
Main article: Measurement of a Circle. Main article: On Spirals. Archimedes is especially important for his discovery of the relation between the surface and volume of a sphere and its circumscribing cylinder.
Archimedes was a mathematician who lived in Syracuse on the island of Sicily. His father, Phidias, was an astronomer, so Archimedes continued in the family line.
Archimedes found that the volume of a sphere is two-thirds the volume of a cylinder that encloses it. According to tradition, he invented the Archimedes screw , which uses a screw enclosed in a pipe to raise water from one level to another.
Archimedes wrote nine treatises that survive. Archimedes was so proud of the latter result that a diagram of it was engraved on his tomb.
In On Floating Bodies , he wrote the first description of how objects behave when floating in water. As a young man, Archimedes may have studied in Alexandria with the mathematicians who came after Euclid.
It is very likely that there he became friends with Conon of Samos and Eratosthenes of Cyrene. He died in that same city when the Romans captured it following a siege that ended in either or BCE.
However Archimedes died, the Roman general Marcus Claudius Marcellus regretted his death because Marcellus admired Archimedes for the many clever machines he had built to defend Syracuse.
Archimedes probably spent some time in Egypt early in his career, but he resided for most of his life in Syracuse , the principal Greek city-state in Sicily, where he was on intimate terms with its king, Hieron II.
Archimedes published his works in the form of correspondence with the principal mathematicians of his time, including the Alexandrian scholars Conon of Samos and Eratosthenes of Cyrene.
He played an important role in the defense of Syracuse against the siege laid by the Romans in bce by constructing war machines so effective that they long delayed the capture of the city.
When Syracuse eventually fell to the Roman general Marcus Claudius Marcellus in the autumn of or spring of bce , Archimedes was killed in the sack of the city.
Far more details survive about the life of Archimedes than about any other ancient scientist, but they are largely anecdotal , reflecting the impression that his mechanical genius made on the popular imagination.
According to Plutarch c. Not only did he write works on theoretical mechanics and hydrostatics, but his treatise Method Concerning Mechanical Theorems shows that he used mechanical reasoning as a heuristic device for the discovery of new mathematical theorems.
There are nine extant treatises by Archimedes in Greek. Archimedes was proud enough of the latter discovery to leave instructions for his tomb to be marked with a sphere inscribed in a cylinder.
That work also contains accurate approximations expressed as ratios of integers to the square roots of 3 and several large numbers.
On Conoids and Spheroids deals with determining the volumes of the segments of solids formed by the revolution of a conic section circle, ellipse, parabola , or hyperbola about its axis.
List 3. De Architectura, Liber IX [online]. Hlava The Golden Crown [online]. On miraculous engines; citace Anthemiuse z Tralles.
Time Magazines [cit. Archimedes claw — animation [online]. On the Construction of the 'Syracusia' Athenaeus V.
Ships and Seamanship in the Ancient World. Archimedes Screw [online]. Archimedean Solid [online]. Archimedean ordered fields [online].
The Galileo Project: Hydrostatic Balance [online]. Rice University, galileo. University of Waterloo [cit. On Floating Bodies [online]. Oblique view of Archimedes crater on the Moon [online].
NASA [cit. California State Capitol Museum.