597 résultats pour "same"
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Atom
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INTRODUCTION
Water Molecule
A water molecule consists of an oxygen atom and two hydrogen atoms, which are attached at an angle of 105°.
spontaneously break apart and change, or decay, into other atoms. Unlike electrons, which are fundamental particles, protons and neutrons are made up of other, smaller particles called quarks. Physicists know of six different quarks.Neutrons and protons are made up of up quarks and down quarks —two of the six different kinds of quarks. The fanciful names of quarks have nothing to do with their properties; the names are simply labels to distinguish one quark from another. Quarks are unique amo...
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Atom - chemistry.
Atoms have several properties that help distinguish one type of atom from another and determine how atoms change under certain conditions. A Atomic Number Each element has a unique number of protons in its atoms. This number is called the atomic number (abbreviated Z). Because atoms are normally electrically neutral,the atomic number also specifies how many electrons an atom will have. The number of electrons, in turn, determines many of the chemical and physical properties ofthe atom. The ligh...
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Television.
A charge-coupled device (CCD) can be much smaller than a camera tube and is much more durable. As a result, cameras with CCDs are more compact and portablethan those using a camera tube. The image they create is less vulnerable to distortion and is therefore clearer. In a CCD, the light from a scene strikes an array ofphotodiodes arranged on a silicon chip. Photodiodes are devices that conduct electricity when they are struck by light; they send this electricity to tiny capacitors. Thecapacitors...
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Intelligence.
education. Teachers had no way of knowing which of the “slow” students had true learning problems and which simply had behavioral problems or poor prior education.In 1904 the French Ministry of Public Instruction asked Binet and others to develop a method to objectively identify children who would have difficulty with formaleducation. Objectivity was important so that conclusions about a child’s potential for learning would not be influenced by any biases of the examiner. The governmenthoped tha...
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Venus (planet) - astronomy.
level winds circle the planet at 360 km/h (225 mph), making a complete rotation in only four days. These winds are said to super-rotate because they travel muchfaster than the rotation of the planet itself. These high-speed winds cover the planet completely, blowing toward the west at virtually every latitude from equator topole. The motions of descending probes, however, have shown that the bulk of Venus’s tremendously dense atmosphere, closer to the planet’s surface, is almoststagnant. From th...
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Radar.
gathers the weak returning radar signals and converts them into an electric current. Because a radar antenna may both transmit and receive signals, the duplexerdetermines whether the antenna is connected to the receiver or the transmitter. The receiver determines whether the signal should be reported and often does furtheranalysis before sending the results to the display. The display conveys the results to the human operator through a visual display or an audible signal. B1 The Antenna The rec...
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- Ah !
vous embrasser parprocuration. – Fi donc ! monsieur Weller ! – Pourquoi fi,ma chère ? – Pour parler comme ça. – Bah ! iln’y apas demal. C’est danslanature. Pasvrai, cuisinière ? – Taisez-vous, impertinent, » répliquacelle-ciavecunvisage dejubilation. Etlà-dessus la cuisinière etMary seprirent àrire encore, jusqu’àceque lerire etlabière etlaviande combinés eussentmislacharmante bonneendanger d’étouffer. Ellenetut tirée decette crise alarmante qu’aumoyen defortes tapessurledos etde plusieurs autre...
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Relativity
I
INTRODUCTION
Albert Einstein
In 1905 German-born American physicist Albert Einstein published his first paper outlining the theory of relativity.
in calculating very large distances or very large aggregations of matter. As the quantum theory applies to the very small, so the relativity theory applies to the verylarge. Until 1887 no flaw had appeared in the rapidly developing body of classical physics. In that year, the Michelson-Morley experiment, named after the American physicistAlbert Michelson and the American chemist Edward Williams Morley, was performed. It was an attempt to determine the rate of the motion of the earth through t...
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Supernova - astronomy.
The term hypernova has been proposed for an extremely massive core-collapse supernova—possibly more than 100 times the mass of the Sun. A hypernova is thought to form a black hole. Just before it explodes, a hypernova may release a huge burst of gamma rays in a jet from the rotating black hole at its center. These jets mayexplain the so-called long gamma-ray bursts detected by astronomers. According to some researchers, massive stars with over 40 solar masses may sometimescollapse directly int...
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Article de presse: Le nouveau départ de Kim Dae-jung
civile). Composés de lettres écrites à sa famille, ces Ecrits sont révélateurs de la pensée politique d'un homme lucide en dépit d'accents parfois messianiques pour commenter l'histoire de son pays et les grands événements mondiaux. La vie de Kim Dae-jung est étroitement liée à l'histoire moderne de la Corée. C'est sans doute ce qui lui confère une légitimitéhistorique dont ne bénéficie aucun autre politicien sud-coréen. Une partie de l'opinion se méfie de lui : elle considère qu'il estdang...
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Exercise.
broad, and most studies suggest a positive relationship between physical fitness and mental achievement. The relationship between regular aerobic exercise and cardiovascular health and longevity is well established. Regular exercise leads to a reduction in the risk ofcoronary heart disease, in which fatty deposits (plaque) form in blood vessels supplying the muscular wall of the heart, compromising oxygen delivery to the heartmuscle. In addition, with regular exercise the efficiency of the heart...
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CHAPITRE DEUX
L'OMBRE DU PASSÉ
Les commentaires ne s'éteignirent pas en neuf jours, ni même en quatre-vingt-dix-neuf.
Il yeut des rumeurs d’étranges chosesquisepassaient danslemonde extérieur ; etcomme Gandalf n’avait pas encore reparuetn’avait pasenvoyé demessages depuisplusieurs années,Frodonrécoltait toutesles nouvelles qu’ilpouvait avoir.Onvoyait maintenant desElfes, quisepromenaient rarementdanslaComté, traverser lesoir lesbois endirection del’ouest ; ilspassaient etne revenaient pas ;mais ilsquittaient laTerre du Milieu etils ne sesouciaient plusdeses problèmes. Ilyavait toutefois desNains surlaroute, enn...
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Physics
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INTRODUCTION
Physics, major science, dealing with the fundamental constituents of the universe, the forces they exert on one another, and the results produced by these forces.
Starting about 1665, at the age of 23, Newton enunciated the principles of mechanics, formulated the law of universal gravitation, separated white light into colors,proposed a theory for the propagation of light, and invented differential and integral calculus. Newton's contributions covered an enormous range of naturalphenomena: He was thus able to show that not only Kepler's laws of planetary motion but also Galileo's discoveries of falling bodies follow a combination of his ownsecond law of m...
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Comparative Anatomy.
In comparing two species, anatomists have to be careful to differentiate between homologous structures, which are ones that have evolved from a shared ancestor, andanalogous structures, which have developed from different origins. Homologous structures are built on the same underlying plan. A human arm, a bat’s wing, and awhale’s flipper look quite different from the outside, but the bones inside reveal that these limbs all have the same basic structure. Analogous structures, by contrast,often l...
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Human Sexuality.
About six weeks after conception, if a Y chromosome is present in the embryo's cells (as it is in normal males), a gene on the chromosome directs the undifferentiatedgonads to become testes. If the Y chromosome is not present (as in normal females), the undifferentiated gonads will become ovaries. If the gonads become testes, they begin to produce androgens (male hormones, primarily testosterone) by about eight weeks after conception. These androgens stimulate development of the one set of the...
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United States History - U.
and improved upon the designs of Arab sailing ships and learned to mount cannons on those ships. In the 15th century they began exploring the west coast ofAfrica—bypassing Arab merchants to trade directly for African gold and slaves. They also colonized the Madeira Islands, the Azores, and the Cape Verde Islands andturned them into the first European slave plantations. The European explorers were all looking for an ocean route to Asia. Christopher Columbus sailed for the monarchs of Spain in 149...
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United States History - U.
and improved upon the designs of Arab sailing ships and learned to mount cannons on those ships. In the 15th century they began exploring the west coast ofAfrica—bypassing Arab merchants to trade directly for African gold and slaves. They also colonized the Madeira Islands, the Azores, and the Cape Verde Islands andturned them into the first European slave plantations. The European explorers were all looking for an ocean route to Asia. Christopher Columbus sailed for the monarchs of Spain in 149...
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Industrial Revolution
I
INTRODUCTION
Industrial Revolution, widespread replacement of manual labor by machines that began in Britain in the 18th century and is still continuing in some parts of the world.
The most important advance in iron production occurred in 1784 when Englishman Henry Cort invented new techniques for rolling raw iron, a finishing process thatshapes iron into the desired size and form. These advances in metalworking were an important part of industrialization. They enabled iron, which was relativelyinexpensive and abundant, to be used in many new ways, such as building heavy machinery. Iron was well suited for heavy machinery because of its strength anddurability. Because of t...
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Industrial Revolution .
The most important advance in iron production occurred in 1784 when Englishman Henry Cort invented new techniques for rolling raw iron, a finishing process thatshapes iron into the desired size and form. These advances in metalworking were an important part of industrialization. They enabled iron, which was relativelyinexpensive and abundant, to be used in many new ways, such as building heavy machinery. Iron was well suited for heavy machinery because of its strength anddurability. Because of t...
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Telephone.
digits is dialed. The development of inexpensive and reliable amplification provided by the introduction of the transistor in the 1960s made practical the design of adialing system based on the transmission of relatively low power tones instead of the higher-power dial pulses. Today most telephones have push buttons instead of a rotary dial. Touch-Tone is an optional service, and telephone companies still maintain the ability to receive pulsedialing. Push-button telephones usually have a switch...
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Horse Racing.
interested parties claim the same horse at the same price, lots are drawn to determine the winning offer. Knowledgeable owners and trainers may use claiming races toobtain, at bargain prices, horses whose former owners underestimated the potential of their animals. Two other types of contests are match races and walkovers. A match race pits only two horses, almost always that season’s most successful racers, in a head-to-headduel. A walkover occurs when only one horse has not been scratched (w...
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Geographic Exploration.
The commercial reason for exploration has been a consistent driving force. In 1492 the great navigator Christopher Columbus sailed west across the Atlantic Oceanseeking a new, shorter, and cheaper route to reach the riches of East Asia, and Portuguese explorer Vasco da Gama circumnavigated Africa for much the same reason.Yet similar investigations of the profitable eastern trade had already been made by Arab sailors. Arab trading ships were sailing from the Arabian Sea to southeasternAsia probab...
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Geographic Exploration - explorer.
The commercial reason for exploration has been a consistent driving force. In 1492 the great navigator Christopher Columbus sailed west across the Atlantic Oceanseeking a new, shorter, and cheaper route to reach the riches of East Asia, and Portuguese explorer Vasco da Gama circumnavigated Africa for much the same reason.Yet similar investigations of the profitable eastern trade had already been made by Arab sailors. Arab trading ships were sailing from the Arabian Sea to southeasternAsia probab...
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Color
I
INTRODUCTION
Color
© Microsoft Corporation.
The colors that absorb light of the additive primary colors are called subtractive primary colors. They are magenta (purplish-pink), which absorbs green; yellow, whichabsorbs blue; and cyan (light greenish-blue), which absorbs red. Thus, if a green light is thrown on a magenta pigment, the eye will perceive black. These subtractiveprimary colors are also called the pigment primaries. They can be mixed together in varying amounts to match almost any hue. If all three are mixed in about equalamoun...
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Tiger - biology.
have a simple digestive system designed to process meat so that the nutrients can be readily absorbed into the bloodstream. With the exception of white tigers, which have blue eyes, all tigers have yellow eyes. Tigers mainly use vision to find prey. Although tigers see about as well as humansduring the day, their large eye openings gather more light than do human eyes, making tiger night vision far superior to that of humans. In addition, a special structurein the tiger’s eye, called the tapetu...
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Seattle - geography.
Mountains. The area includes the suburban cities of Bellevue, Kirkland, Redmond, Renton, and Issaquah. The Eastside has become home to dozens of high-technologyindustries including Microsoft Corporation, ATL Ultrasound, Nintendo of America, divisions of The Boeing Company, and many other firms. In the 1960s commutersheaded to Seattle jobs from homes on the Eastside. Today, the “reverse commute” from Seattle homes to jobs on the Eastside is just as heavy, and both streams oftraffic cross the same...
- Le personnage de WELLER Sam de Charles Dickens
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Automation.
Not all industries require the same degree of automation. Agriculture, sales, and some service industries are difficult to automate. The agriculture industry may becomemore mechanized, especially in the processing and packaging of foods; however, in many service industries such as supermarkets, for example, a checkout countermay be automated and the shelves or supply bins must still be stocked by hand. Similarly, doctors may consult a computer to assist in diagnosis, but they must makethe final...
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Miami (Florida) - geography.
VI EDUCATIONAL AND CULTURAL INSTITUTIONS Colleges and universities in the area include the University of Miami, Florida International University, Barry University, St. Thomas University, and Florida MemorialCollege. Miami-Dade Community College, one of the nation’s largest two-year colleges, has six campuses in the region. Leading museums include the Historical Museumof Southern Florida, the Miami Museum of Science, the Miami Art Museum, the Lowe Art Museum on the campus of the University of M...
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Electric Motors and Generators.
the armature. It is often desirable to generate as high a voltage as possible, and rotating armatures are not practical in such applications because of the possibility of sparkingbetween brushes and slip rings and the danger of mechanical failures that might cause short circuits. Alternators are therefore constructed with a stationary armaturewithin which revolves a rotor composed of a number of field magnets. The principle of operation is exactly the same as that of the AC generator described,...
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San Antonio (city, Texas) - geography.
The SBC Center is the home venue for the San Antonio Spurs of the National Basketball Association (NBA) and the San Antonio Silver Stars of the Women's NationalBasketball Association (WNBA). The dome also serves as the site for the Alamo Bowl, an annual post-season college football game. Large themed amusement parks inthe San Antonio area are Fiesta Texas and Sea World of Texas. San Antonio’s major annual event is the Fiesta, a ten-day celebration in late April with carnivals, ethnic feasts, art...
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Solar System - astronomy.
dwarf planets according to the IAU because they have rounded shapes from their own gravity but have not cleared their neighborhoods in space of other objects—bothorbit through the Kuiper Belt, a region beyond Neptune containing thousands of small icy bodies. Pluto and Eris are composed of layers of ice around a rocky core.Ceres qualifies as a dwarf planet because it is spherical but is found in the asteroid belt, a zone between the orbits of Mars and Jupiter that contains thousands of smallrocky...
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Detroit - geography.
of German and Irish immigrants. In the first half of the 20th century, the percentage of foreign-born residents declined, even though many immigrants arrived fromeastern Europe. During World War II (1939-1945), both whites and blacks were attracted from the South to work in the city’s defense industries. In 1950 foreign-bornand black residents each made up about 16 percent of the total population. In the five decades after 1950, the city lost almost half of its population, as many white resident...
- COUPS DE FEU DANS LA SIERRA de SAM PECKINPAH
- Nujoma Sam : Homme d'Etat namibien
- Sami Frey : l'accomplissement de « Nathan le Sage »
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Analyse American Beauty de Sam Mendez
avec recul et un regard critique. Ainsi il est "déjà mort". On dit qu'avant de renaître il faut mourir symboliquement. Le passage de personnage passif à personnage actif de Lester va s'amorçer après le choc d'un déclancheur émotionel incarné par Angela Haze (Mena Suvari), une jeune et jolie amie de sa fille pour qui il va développer une passion dévorante, et pour qui il voudra changer afin de la séduire. Mais même si Angela est le détonat...
- Analyse American Beauty de Sam Mendez
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absurde !
Deux des Shiriffes quittèrent immédiatement le groupe pour aller vers lui. « Chef ! dit Merry. Rappelez immédiatement vos hommes dans les rangs, si vous ne voulez pas qu’ils aient affaire à moi ! » Les deux hobbits, sur un ordre vif du chef, revinrent d’un air maussade. « Et maintenant, allez ! » dit Merry, après quoi, les voyageurs veillèrent à ce que le pas de leurs poneys fût assez rapide pour pousser en avant les Shiriffes aussi vite qu’ils pouvaient marcher. Le s oleil sorti...
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CHAPITRE QUATRE
UN RACCOURCI VERS LES CHAMPIGNONS
Au matin, Frodon se réveilla tout dispos.
changement quisemblait s’êtreemparé delui. Cela nesonnait pascomme lavoix del’ancien SamGamegie, assis là, hormis uneexpression inhabituellement pensive. — Vois-tu lanécessité dequitter laComté maintenant –maintenant quetondésir deles voir s’est déjà réalisé ? demanda-t-il. — Oui, monsieur. Jene sais comment l’exprimer, maisaprès cettenuit,jeme sens différent. Ilme semble voir devant moi,enquelque sorte.Jesais quenous allons suivre unetrès longue route,jusque dansl’obscurité ; mais jene peux pas...
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Sujet : Populations Sames en Norvège et en Finlande (KHÔLLE DE GÉO)
KHÔLLE DE GÉO Sujet : Populations Sames en Norvège et en Finlande Dans les régions froides et hostiles de l’Arctique, où le climat semble parfois être défavorable à la vie, certains peuples ont appris à vivre au gré du froid et des caprices de la nature. Ces peuples autochtones vivent dans ces régions enneigées depuis la nuit des temps, loin de la mondialisation et de la modernisation qui touchent les régions occidentales. Néanmoins, avec la prise d’intérêt des pays occidentaux concernant...
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helena
ŽIVOT I ŠKOLA br. 12(2/2004.) . 132 2. ISTRAŽIVANJE Nastavna je jedinica još uvijek bila bez naslova, a u čenici su sami objašnjavali prirodu jezi čnih znakova u u čionici. Slijedila je najava teme: promatranje odnosa izme u izraza i sadržaja jezi čnoga znaka i to na primjerima iz izmišljenoga pro čitanoga, polaznoga teksta, pod...
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RABIN Sam : L'Homme de coin
RABIN Sam L'Homme de coin Né à Manchester, 1908 Cet homme de coin, ce soigneur anxieux au regard intense ; ces cordes, qui entourent et délimitent le ring comme elles définissent le destin d'un homme ; cette tonalité sombre à travers laquelle s'égrènent les secondes : telle est la vérité du pugilisme, que transcrit avec force et retenue tout à la fois l'art de Sam Rabin. L'Homme de coin apparaît très signifi catif de l...
- SAM TRANG TRINH [Prophéties de Trang Trinh]
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Marriage.
In many traditional societies, marriage typically involved transfers of property from the parents to their marrying children or from one set of parents to the other. Thesecustoms persist in some places today and are part of the tradition of arranged marriages. For example, in some cultures the bride’s parents may give property (knownas a dowry) to the new couple. The practice of giving dowries has been common in countries such as Greece, Egypt, India, and China from ancient times until thepresen...
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Pippin s’en fut avec une demi-douzaine de gars sur des poneys.
voir. Le Patron et ce Sharcoux, dont ils ont parlé, ils pourraient faire quelque malheur là -bas avant le matin. » « Bon, Sam, dit Chaumine. Choisis un gars ou deux, et amène le chez moi. Tu n’auras pas besoin d’approcher du vieux village de H obbitebourg de l’autre côté de l’Eau. Mon Jolly, ici présent, te montrera. » Sam partit. Merry établit une surveillance autour du village et des gardes aux barrières pour la nuit. Après quoi, lui et Frodon s’en furent avec le Père Chaumine. Ils...
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Sound
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INTRODUCTION
Sound, physical phenomenon that stimulates the sense of hearing.
A fundamental law of harmony states that two notes an octave apart, when sounded together, produce a pleasant-sounding combination. Other combinations of notescan also be pleasing. Physically, an interval of a fifth consists of two notes, the frequencies of which bear the arithmetical ratio 3 to 2, and a major third, the ratio 5 to4. Fundamentally, the law of harmony states that two or more notes sound pleasant when played together if their frequencies bear small, whole number ratios; if thefreq...
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Excerpt from Barnaby Rudge - anthology.
Mr. Dennis rolled lazily over upon his breast, and resting his chin upon his hand in imitation of the attitude in which Hugh lay, said, as he too looked towards thedoor: “ Ay, ay, you knew him, brother, you knew him. But who'd suppose to look at that chap now, that he could be the man he is! Isn't it a thousand cruel pities, brother,that instead of taking his nat'ral rest and qualifying himself for further exertions in this here honourable cause, he should be playing at soldiers like a boy?...
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Quantum Theory
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INTRODUCTION
Quantum Theory, in physics, description of the particles that make up matter and how they interact with each other and with energy.
electron in the same way a particle with momentum would: It bumps the electron and changes the electron’s path. The light is also affected by the collision as though itwere a particle, in that its energy and momentum changes. Momentum is a quantity that can be defined for all particles. For light particles, or photons, momentum depends on the frequency, or color, of the photon, which in turndepends on the photon’s energy. The energy of a photon is equal to a constant number, called Planck’s cons...
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From The Sound and the Fury - anthology.
'You'd better slip on your pants and run,' he said. He went out. I got up and moved about, listening to him through the wall. He entered the sitting-room, toward the door. 'Aren't you ready yet?' 'Not yet. Run along. I'll make it.' He went out. The door closed. His feet went down the corridor. Then I could hear the watch again. I quit moving around and went to the window and drew thecurtains aside and watched them running for chapel, the same ones fighting the same heaving coat-s...