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Hand Held First Introduced
1,065 wordsEdwin Land and George Wheelwright III founded Polaroid Corporation in 1936. The interlocking rings of Polaroid filters have been the emblems of the Polaroid Corporation for over sixty years. Edwin H. Land first demonstrated one-step photography at a meeting of the Optical Society of America on February 21, 1947. Following that, the first one-step camera with color film was invented in 1963. Since then, the company has come a long way. In 1998, the Polaroid Corporation expanded distribution to ov...
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Nuclear Reaction Naked Eye
1,061 wordsSTARS A star is a large celestial body composed of gravitationally contained hot gases giving off electromagnetic radiation, especially light. The sun is actually a star. Unlike the sun the stars seem to be fixed, but in fact stars are in rapid motion, but their distances are so great no relative changes can be seen with the naked eye. The sun is a typically star, with a visible surface called a photosphere, which an atmosphere of hot gases, and above them an outlawing stream of particles called...
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Earthquake Loads Resistant Design Of Buildings
1,937 words1. 1 2. Summary 2 3. Earthquake Design - A Conceptual Review 2 4. Earthquake Resisting Performance Expectations 3 5. Key Material Parameters for Effective Earthquake Resistant Design 3 6. Earthquake Design Level Ground Motion 4 6. 1. Elastic Response Spectra 4 6. 2. Relative Seismicity 5 6. 3. Soil amplification 6 7. Derivation of Ductile Design Response Spectra 7 8. Analysis and Earthquake Resistant Design Principles 8 8. 1. The Basic Principles of Earthquake Resistant Design 8 8. 2. Controls o...
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Earthquake Loads Resistant Design Of Buildings
2,074 words... Spectra are developed by calculating the of response a single mass oscillator (usually with 5 % critical damping present) to the design level earthquake motion. Engineers traditionally have shown a preference for acceleration spectra, since the resulting coefficient, when multiplied by the seismic mass, results in the lateral base shear for the building. In Australia [ 7 ] and the Uniformed Building Code used in the western USA [ 9 ] these spectra are presented as a simple uniform coefficien...
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Organic Chemistry Boiling Point
990 wordsTOCyclohexanone OXIDATION OF CYCLOHEXANOL TO CYCLOHEXANONE The oxidation of cyclohexane to cyclohexane involves the removal of hydrogen from the OH group. After separation and purification, an Infrared Spectrum will be run to determine the composition of the recovered material. Infrared Spectroscopy is a very powerful technique used in the determination of molecular structure and the identification of unknown organic materials. The infrared spectrum yields direct information about the presence o...
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X 10 S 1
1,147 wordsFluorescence Study of the Kinetics of Energy Transfer Between Dyes 1. Introduction Coumarin 1 and Sodium fluorescein are two dyes which absorb and emit light in the visible region. By using a spectrophotometer we are recording an absorption spectrum and then determining the molar decade absorption coefficients, which will be used later to interpret and analyse the fluorescence spectra. For fluorescence spectra, there are two kinds, the excitation and the emission spectrum. The excitation spectru...
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Board Of Education Radio Stations
1,414 wordsThe old 45 MHz FM broadcast band In 1945 the FCC decided that FM would have to move from the established 42 49 megahertz pre-war band to a new band at 88 108 megahertz, to make way for television. Both in frequency spectra and consumer dollars. Therefore, all radios with an FM band of 88 to 108 MHz are post-war. Rca's David Sarnoff in particular wanted FM to go away so the public wouldnt be distracted from buying his latest up and coming product: televisions. Maybe if Armstrong said to Sarnoff i...
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Henry Draper Solar Spectrum Stars
422 wordsMEGAN JACKSON MS. KEYS SCIENCE DECEMBER 5, 2000 THE STARS AND GALAXIES Have you ever looked up at the sky and wondered what are those bright and shiny things up there. Stars: a natural luminous body visible in the sky especially at night. A self-luminous gaseous celestial body offbeat mass which produces energy by means of nuclear fusion reactions, whose shape is usually spheroidal, and whose size may be as small as the earth or larger than the earth? s orbit. Galaxies: Any of the very large gro...
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Back And Forth High Strength
1,791 wordsWHY DO SKATEBOARDERS SHOES WEAR OUT SO FAST? Through out skateboarding history a sand paper material known as grip tape has been glued to skateboard decks. This material made for gripping onto boards also destroys sneaker soles. Grip tape causes friction between sneakers and itself, while making a grip and facilitating control of the board. Pedaling wears out sneakers like walking, but at more accelerated rates; much higher than walking. Becoming more circumspect, there is the factor of increase...
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Force Of Gravity White Dwarf
2,676 wordsAlthough they are tiny in size, white dwarfs have played a great role in astronomy. These compact stars are very different from familiar objects like our sun. They also pose a seemingly endless series of puzzles, whose solutions provide new insights into many areas of physics and astronomy. To unravel a wide variety of phenomena such as cataclysmic variables (novae, dwarf novae), planetary nebulae, and some types of supernova, we have to understand white dwarfs. These stars may even hold clues t...
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