Archimedes German Moreno By: Molly Reid

Archimedes  Ancient Greek mathematician, physicist and engineer.  Birth 287- Syracuse Sicily

Archimedes’ Screw  Archimedes was credited with the invention around the year 250 BC.  A screw inside a hollow pipe with one lower end in water, the screw is turned and the water flows upward with the spiral.

 Mathematics behind the screw  The slope of the outside of the screw's helical blades with respect to its sides is 2. This requires that the slope the screw makes with respect to a horizontal line be less than 2 (an angle of 63°) in order for the buckets or pockets of water to form. In the profile of the screw, the projection of each helical blade consists of two sinusoidal curves with the same periods and phases. [Nation Master Encyclopedia] [Archimedean Screw" by Sándor Kabai, The Wolfram Demonstrations Project, ] Archimedean Screw"The Wolfram Demonstrations ProjectArchimedean Screw"The Wolfram Demonstrations Project

Law of the Lever “Give me a place to stand and I will move the Earth.”

 ΤΑ ΜΕΓΕΘΕΑ ΙΣΟΡΡΟΠΕΟΝΤΙ ΑΠΟ ΜΑΚΕΩΝ ΑΝΤΙΠΕΠΟΝΘΟΤΩΣ ΤΟΝ ΑΥΤΟΝ ΛΟΓΟΝ ΕΧΟΝΤΩΝ ΤΟΙΣ ΒΑΡΕΣΙΝ-Archimedes  Magnitudes are in equilibrium at distances reciprocally proportional to their weights. [ ARCHIMEDES by E.J. Dijksterhuis (translated by C. Dikshoorn) Princeton University Press, Princeton, N.J., U.S.A., 1987 ] Princeton University PressPrinceton University Press

Archimedes Principle  His law that states that if a body immersed in a fluid it’s pushed up by a force (buoyancy) equal to the weight of the fluid displaced by the body.  Buoyancy- 1.The power to float or rise in a fluid; relative lightness 2. The power or supporting a body so that it floats upward pressure exerted by the fluid in which a body is immersed. 2. The power or supporting a body so that it floats upward pressure exerted by the fluid in which a body is immersed.

Stamps Attributed to Archimedes

Died 212 BC  Archimedes was murdered by a Roman soldier.

Citations  Oil painting of Archimedes by the Italian artist Giuseppe Nogari ( ).  English portrait artist Henry Wyatt ( ).  1740 engraving of Archimedes  1965 Jacques Superchocolat of Belgium  Cigarette Oriental de Belgique in 1938  chromolithographic outer label for cigar boxes dating from chromolithographic  ARCHIMEDES by E.J. Dijksterhuis (translated by C. Dikshoorn) Princeton University Press, Princeton, N.J., U.S.A., 1987 ] by E.J. Dijksterhuis (translated by C. Dikshoorn) Princeton University Press, Princeton, N.J., U.S.A., 1987 ] Princeton University Press Princeton University Press  [Nation Master Encyclopedia] [Archimedean Screw" by Sándor Kabai, The Wolfram Demonstrations Project, ] [Archimedean Screw" by Sándor Kabai, The Wolfram Demonstrations Project, ]Archimedean Screw"The Wolfram Demonstrations ProjectArchimedean Screw"The Wolfram Demonstrations Project  Dictionary.com