CARDS to DISTRIBUTE Flashcards
AMERICA ISN’T INDIA?
Who.
When.
Apparently, the credit is traditionally given to the Florentine Amerigo Vespucci (1454-1512). Of course, America comes from the name Amerigo.
His famous letter The New World – announcing his theory that South America and the Caribbean were part of a “new” continent unknown to either Classical Man, the Muslim, or the Sino-influenced societies – followed Vespucci’s 1501-1502 voyage to the Americas.
CHRISTOPHER COLUMBUS
Voyages
Dates
4 voyages 1492 - 1506
NORMANS
Where from?
3 modern countries
Etymology
The Normans (Norman: Normaunds; French: Normands; Latin: Normanni) were the people who, in the 10th and 11th centuries, gave their name to Normandy, a region in central-northern coastal France.
They were descended from Norse (“Norman” comes from “Norseman”) Vikings (Old English wicingas—”pirates”) from Denmark, Iceland and Norway who, under their leader Rollo, agreed to swear fealty to King Charles III of West Francia.
Through generations of mixing with the native Frankish and Gallo-Roman populations, their descendants gradually became assimilated into the Carolingian-based cultures of West Francia. The distinct cultural and ethnic identity of the Normans emerged initially in the first half of the 10th century, and it continued to evolve over the succeeding centuries.
SAXONS
Anglo-Saxons
Where originated
The Saxons (Latin: Saxones, Old English: Seaxe, Old Saxon: Sahson, Low German: Sassen) were a group of Germanic tribes first mentioned as living near the central North Sea coast of what is now Germany (Old Saxony), in the late Roman Empire.
They were soon mentioned as raiding and settling in many North Sea areas, as well as pushing south inland towards the Franks. Significant numbers settled in large parts of Great Britain in the early Middle Ages and formed part of the merged group of Anglo-Saxons who eventually organised the first united Kingdom of England.
Many Saxons however remained in Germania (Old Saxony c. 531–804), where they resisted the expanding Frankish Empire through the leadership of the semi-legendary Saxon hero, Widukind. Initially, Saxons of Britain and those of Old Saxony (Northern Germany) were both referred to as ‘Saxons’ in an indiscriminate manner. The term Anglo-Saxon, in turn, came into practice in the 8th century (probably by Paul the Deacon) to distinguish English Saxons from continental Saxons (Ealdseaxe, ‘old Saxons’).
GALILEO
Overview and known as…
Known for his work as astronomer, physicist, engineer, philosopher, and mathematician, Galileo has been called the “father of observational astronomy”, the “father of modern physics”
Galileo’s championing of heliocentrism and Copernicanism was controversial during his lifetime, when most subscribed to either geocentrism or the Tychonic system.[4] He met with opposition from astronomers, who doubted heliocentrism because of the absence of an observed stellar parallax.[4] The matter was investigated by the Roman Inquisition in 1615, which concluded that heliocentrism was “foolish and absurd in philosophy, and formally heretical since it explicitly contradicts in many places the sense of Holy Scripture.”[4][5][6] Galileo later defended his views in Dialogue Concerning the Two Chief World Systems, which appeared to attack Pope Urban VIII and thus alienated him and the Jesuits, who had both supported Galileo up until this point.[4] He was tried by the Inquisition, found “vehemently suspect of heresy”, and forced to recant. He spent the rest of his life under house arrest.[7][8] While under house arrest, he wrote one of his best-known works, Two New Sciences, in which he summarized work he had done some forty years earlier on the two sciences now called kinematics and strength of materials.[9][10]
GALILEO
Timeline of Life Events
Birth Studies and Professorship
Medici Patronage
Audience with Pope;
Lincean Academy
Pope gives permission for Copernican study
House Arrest
Death
1564 – BIRTH in Pisa, Italy’s
1581 – Enrols as medical student at University of Pisa
1582 – Attends MATHEMATICS LECTURE by Ostilio Ricci and decides to study math and science (age 18)
1585 – Leaves University of Pisa without degree and works as tutor
1592 – Appointed PROFESSOR (Age 28) of mathematics at University of Padua, remains 18 years
1610 – Lifetime appointment to mathematics position at University of Padua (as he leaves leaves) and becomes mathematician and philosopher for COSIMO I de MEDICI II, Grand Duke of Tuscany (age 46)
1611 – granted audience with POPE; made member of LINCEAN ACADEMY
1624 – Visits Pope who praises and honours him, leaving with assumed PERMISSION to publish work on the Copernican vs. Ptolemaic Systems (age 60)
1633 – sentenced by the Inquisition to imprisonment, commuted to HOUSE ARREST (age 69), for vehement suspicion of heresy
1642 – Death in Arcetri, Italy (age 78)
GALILEO
Timeline of Inventions and discoveries
Hydrostatic Balance
Thermometer
Improved ballistics compass
Telescopes
Phases of Venus
Jupiter’s moons
Compound Microscopes
1586 – Invents hydrostatic balance; wrote La Balancitta (The little balance) (age 22)
1593– Invents early thermometer (age 29)
1595 – Invents improved ballistics calculation geometric and military compass (age 31)
1609 – Independently invents and improves telescopes based on description of invention by Hans Lippershey (age 45)
1611 - Discovers phases of Venus, proving geocentric models impossible; granted audience with Pope; made member of Lincean Academy (age 47)
1612 – views our moon’s mountains and craters; tracks 4 of Jupiter’s moons, proving not all bodies orbit the earth. Proposes their use for Longitude (age 48)
1625 – Illustrations of insects made using one of Galileo’s compound microscopes published (age 61)
1638 – Publishes Dialogues Concerning Two New Sciences while under house arrest (age 72)
GALILEO
Timeline of Publications (x4)
~1590 – Partially completes De Motu (On Motion), which is never PUBLISHED (age 24)
1610 – PUBLISHES Sidereus Nuncius (Starry Messenger) (age 46)
1630 – Completes Dialogue Concerning the Two Chief World Systems and subsequently receives approval of Church censor
1632 – PUBLISHES Dialogue Concerning the Two Chief World Systems, sentenced to house arrest (age 68)
1638 – PUBLISHES Dialogues Concerning Two New Sciences while under house arrest (age 74)
GALILEO
Milky Way Observation
Galileo observed the Milky Way, previously believed to be nebulous, and found it to be a multitude of stars packed so densely that they appeared from Earth to be clouds.
GALILEO
Archimedes Invention that brought him to the attention of the Scientific community
Around the year 1586 Galileo Galilei invented a hydrostatic balance for weighing metals in air and water after apparently being inspired by the work of Archimedes.
GALILEO
Pendulum Discoveries
Galileo conducted several experiments with pendulums. It is popularly believed (thanks to the biography by Vincenzo Viviani) that these began by watching the swings of the bronze chandelier in the cathedral of Pisa, using his pulse as a timer.
Later experiments are described in his Two New Sciences. Galileo claimed that a simple pendulum is isochronous, i.e. that its swings always take the same amount of time, independently of the amplitude.
GALILEO
Relativity - what did he propose?
Galileo put forward the basic principle of relativity, that the laws of physics are the same in any system that is moving at a constant speed in a straight line, regardless of its particular speed or direction. Hence, there is no absolute motion or absolute rest. This principle provided the basic framework for Newton’s laws of motion and is central to Einstein’s special theory of relativity.
GALILEO
Inertia
Galileo stated: “Imagine any particle projected along a horizontal plane without friction; then we know, from what has been more fully explained in the preceding pages, that this particle will move along this same plane with a motion which is uniform and perpetual, provided the plane has no limits”
This was incorporated into Newton’s laws of motion (first law).
GALILEO
Mathematics?
While Galileo’s application of mathematics to experimental physics was innovative, his mathematical methods were the standard ones of the day.
GALILEO
Entry into the field of Mathematics - anecdote
Up to this point, Galileo had deliberately been kept away from mathematics, since a physician earned a higher income than a mathematician. However, after accidentally attending a lecture on geometry, he talked his reluctant father into letting him study mathematics and natural philosophy instead of medicine.
ARCHIMEDES
Dates
c. 287 – c. 212 BCE
Archimedes of Syracuse was a Greek mathematician, physicist, engineer, inventor, and astronomer.[3] Although few details of his life are known, he is regarded as one of the leading scientists in classical antiquity. Generally considered the greatest mathematician of antiquity and one of the greatest of all time,[4][5] Archimedes anticipated modern calculus and analysis by applying concepts of infinitesimals and the method of exhaustion to derive and rigorously prove a range of geometrical theorems, including the area of a circle, the surface area and volume of a sphere, and the area under a parabola.
ARCHIMEDES PRINCIPLE
Anecdote
The most widely known anecdote about Archimedes tells of how he invented a method for determining the volume of an object with an irregular shape. According to Vitruvius, a votive crown for a temple had been made for King Hiero II of Syracuse, who had supplied the pure gold to be used, and Archimedes was asked to determine whether some silver had been substituted by the dishonest goldsmith.[18] Archimedes had to solve the problem without damaging the crown, so he could not melt it down into a regularly shaped body in order to calculate its density. While taking a bath, he noticed that the level of the water in the tub rose as he got in, and realized that this effect could be used to determine the volume of the crown. For practical purposes water is incompressible,[19] so the submerged crown would displace an amount of water equal to its own volume. By dividing the mass of the crown by the volume of water displaced, the density of the crown could be obtained. This density would be lower than that of gold if cheaper and less dense metals had been added. Archimedes then took to the streets naked, so excited by his discovery that he had forgotten to dress, crying “Eureka!” (Greek: “εὕρηκα, heúrēka!”, meaning “I have found [it]!”).[18] The test was conducted successfully, proving that silver had indeed been mixed in.
ARCHIMEDES PRINCIPLE
Probable Solution
The story of the golden crown does not appear in the known works of Archimedes. Moreover, the practicality of the method it describes has been called into question, due to the extreme accuracy with which one would have to measure the water displacement.[21] Archimedes may have instead sought a solution that applied the principle known in hydrostatics as Archimedes’ principle, which he describes in his treatise On Floating Bodies. This principle states that a body immersed in a fluid experiences a buoyant force equal to the weight of the fluid it displaces.[22] Using this principle, it would have been possible to compare the density of the crown to that of pure gold by balancing the crown on a scale with a pure gold reference sample of the same weight, then immersing the apparatus in water. The difference in density between the two samples would cause the scale to tip accordingly. Galileo considered it “probable that this method is the same that Archimedes followed, since, besides being very accurate, it is based on demonstrations found by Archimedes himself.”[23] In a 12th-century text titled Mappae clavicula there are instructions on how to perform the weighings in the water in order to calculate the percentage of silver used, and thus solve the problem.[24][25] The Latin poem Carmen de ponderibus et mensuris of the 4th or 5th century describes the use of a hydrostatic balance to solve the problem of the crown, and attributes the method to Archimedes
ARCHIMEDES SCREW
Anecdotes
Possibly modelled on
1839 Ship
A large part of Archimedes’ work in engineering arose from fulfilling the needs of his home city of Syracuse. The Greek writer Athenaeus of Naucratis described how King Hiero II commissioned Archimedes to design a huge ship, the Syracusia, which could be used for luxury travel, carrying supplies, and as a naval warship. The Syracusia is said to have been the largest ship built in classical antiquity.[26]
According to Athenaeus, it was capable of carrying 600 people and included garden decorations, a gymnasium and a temple dedicated to the goddess Aphrodite among its facilities. Since a ship of this size would leak a considerable amount of water through the hull, the Archimedes’ screw was purportedly developed in order to remove the bilge water. Archimedes’ machine was a device with a revolving screw-shaped blade inside a cylinder. It was turned by hand, and could also be used to transfer water from a low-lying body of water into irrigation canals.
The Archimedes’ screw is still in use today for pumping liquids and granulated solids such as coal and grain. The Archimedes’ screw described in Roman times by Vitruvius may have been an improvement on a screw pump that was used to irrigate the Hanging Gardens of Babylon.[27][28][29] The world’s first seagoing steamship with a screw propeller was the SS Archimedes, which was launched in 1839 and named in honor of Archimedes and his work on the screw.
ARCHIMEDES
Lever Quote
Archimedes’ work on levers caused him to remark: “Give me a place to stand on, and I will move the Earth.” (Greek: δῶς μοι πᾶ στῶ καὶ τὰν γᾶν κινάσω)[43]
ARCHIMEDES SUN RAY
Archimedes may have used mirrors acting collectively as a parabolic reflector to burn ships attacking Syracuse. The 2nd century AD author Lucian wrote that during the Siege of Syracuse (c. 214–212 BC), Archimedes destroyed enemy ships with fire. Centuries later, Anthemius of Tralles mentions burning-glasses as Archimedes’ weapon.[33] The device, sometimes called the “Archimedes heat ray”, was used to focus sunlight onto approaching ships, causing them to catch fire.
ARCHIMEDES
Block and Tackle
Catapult
Plutarch describes how Archimedes designed block-and-tackle pulley systems, allowing sailors to use the principle of leverage to lift objects that would otherwise have been too heavy to move.[44] Archimedes has also been credited with improving the power and accuracy of the catapult.