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Military Forces Safety Precautions
1,614 wordsPE 116 Movement Education Kevin Jun Date 4 - 21 - 99 The word gymnastics came from the Greeks. The Greeks used this word to describe any type of physical activity. Exercise was an important part of their education process, sort of like what is in place today. They used exercise in order to beautify the body, promote health, comfort, strength, and vigor. The Romans took the Greeks beliefs on exercise, and used them in training their military forces. After the Romans, exercising virtually dropped ...
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Solid State Lasers Back And Forth
2,014 wordsLaser is an acronym for light amplification by stimulated emission of radiation. In the last century many types of lasers have been used for many different applications from welding to surgery to military and even many uses in every day life by harnessing the principles of light and stimulated emission. To understand how lasers work we must first understand the physics behind light waves. Light is emitted from a source and travels in straight lines and when it strikes an object is either absorbe...
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Blast Furnace Reinforced Concrete
2,369 wordsConclusions & Recommendations - The intent of our effort here is to find out how useful it is for the modern world civilizations to use concrete with reinforcement as two of the fundamental building materials. This project contains reinforced concrete beam bending and strength analysis for 3 different concrete blocks and also gives background and research information about concrete. The comparison of concrete blocks includes different amounts of water / cement ratios and also different sizes of ...
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Frames Per Second World War Ii
4,824 words... goals are usually broadcast from a central source, a television station, to reception devices such as television sets in homes or relay stations such as those used by cable television service providers. Television is the most widespread form of communication in the world. Though most people will never meet the leader of a country, travel to the moon, or participate in a war, they can observe these experiences through the images on their television. Television has a variety of applications in...
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Electron Microscope Three Dimensional
871 wordsThe electron microscope has become one of the most widely utilized instruments for materials characterization. An electron microscope is a scientific instrument that allows us to "see" objects so small that they cannot be seen in any other way. (CITE) Electron microscopes have allowed scientists to see individual molecules and atoms for the first time. Most microscopes, including those in schools and laboratories today, are optical microscopes. They use glass lenses to enlarge, or magnify, an im...
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Solid State Lasers Beam Of Light
1,749 wordsL A S E R S Did you know that some laser beams are small enough and powerful enough to drill two hundred holes on a spot as tiny as the head of a pin? The first major advancement in laser development came in 1954. This was the year that Charles H. Townes, an American physicist, created a device that amplified microwaves. This device was actually called a maser at first, which was short for Microwave Amplification by Stimulated Emission of Radiation Masers. It produced microwaves of just one freq...
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Intellectual Property Rights X Rays
839 wordsPhysics Current Event Article Traditionally, for about 40 years now, cancer therapy has been using protons to treat tumors. This treatment has been in use since 1946, after Robert Wilson, a Berkeley physicist offered it as an option to less effective X-rays method. However, protons, as well as X-rays cause damage to DNA because they use radiation. According to Michael Holzscheiter, a spokesman for Geneva Cern's particle accelerator laboratory, there a new, revolutionary safer method for treating...
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Electric Light Bulb World War Ii
4,554 wordsThe Development of the Television Television, our link to the changing world around us. Once thought to be just a passing phase through a quickly advancing society, but now a common innovation in every household. Since the l 940 s television has become the window on the world for much of industrialized society. Anything the eye can see may be brought to the little screens in living rooms, bedrooms, and kitchens. What comes through the window, however, does not always please everyone. Television ...
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Directly Proportional 50 Cm
1,310 wordsPhysics Coursework: - Bridges. Plan. Aim: The aim of this experiment is to find out the amount of sag a bridge of different lengths can cause when under different kinds of tension and mass. Apparatus: To carry out this experiment we will need the following apparatus Weights (In different proportions) A measuring apparatus (Ruler) 1 metre of wood Two wooden blocks. Method: We will assemble the apparatus together and set the pieces up as shown in fig. 1. The two wooden blocks shall act as the supp...
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Electron Beam Large Number
914 wordsThe Television B G History , 1999 The Television The invention of television has been basically the quest for a sufficient device for scanning the image (Everson 12). The first such device was the so-called Nipkow disk, patented by the German inventor Paul Gottlieb Nipkow in 1884. This was a flat, circular disk that was perforated with a series of small holes arranged in a spiral radiating from the center to the rim. As the disk was revolved in front of the eye, the outermost hole scanned a stri...
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Three Dimensional Laser Light
1,264 wordsNearly everyone is fascinated by holograms. The often brightly colored three-dimensional images are constantly showing up in more and more places. From the security holograms on CDs and computer software, to hologram artwork, they are becoming ever more popular. But few people realize just how incredible holograms are. The Hungarian-born scientist Dr. Dennis Gabor first described the principles and technique of holography in 1947 (he received the 1971 Nobel Prize in Physics for this contribution...
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Light Waves Light Rays
1,064 wordsToss a pebble in a pond -see the ripples? Now drop two pebbles close together. Look at what happens when the two sets of waves combine -you get a new wave! When a crest and a trough meet, they cancel out and the water goes flat. When two crests meet, they produce one, bigger crest. When two troughs collide, they make a single, deeper trough. Believe it or not, youve just found a key to understanding how a hologram works. But what do waves in a pond have to do with those amazing three- dimensiona...
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Sound Waves Laser Light
2,160 wordsWhile working to Holography Holography While working to improve the resolution of an electron microscope, a brilliant man named Dennis Gabor had developed a theory on Holography. This dates back to the year of 1947. Dennis Gabor is a British/Hungarian scientist who created the word Holography from Greek terms. He used the word holo's, meaning whole, and gramma, meaning message. Gabor characterized his work as an experiment in serendipity that was begun too soon. The next decade brought about fru...
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Beam Of Light Laser Beam
497 wordsHow a CD works Compact disc (CD) players have increasingly replaced the phonograph and the cassette tape. They offer a clear, crisp sound, faint background noise, and have the additional advantage of longer life. In addition to their audio content, some compact discs contain digital graphics that can be displayed on a television screen. To understand how a CD works one must understand what a CD consists of. A CD is about 1. 2 millimeters thick. Most of the CD consists of an injection-molded piec...
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Solid State Lasers Beam Of Light
1,373 wordsA laser (LAY zum) is a device that produces a very narrow beam of light. This is called coherent light. It is formed from producing light at equal wavelengths in phase. The result is a beam of light that does not stray from it? s path. Conventional light bulbs produce incoherent light. This form of light diffuses immediately upon radiation from its source. The size of a laser beam varies greatly. Some lasers produce beams that are small enough to fit 200 beams in an area the size of a pinhead. T...
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