Carbon nanotube 1 Carbon nanotube Carbon nanotubes (CNTs) are allotropes of carbon with a cylindrical nanostructure. Nanotubes have been constructed with [1] length-to-diameter ratio of up to 132‚000‚000:1‚ significantly larger than for any other material. These cylindrical carbon molecules have unusual properties‚ which are valuable for nanotechnology‚ electronics‚ optics and other fields of materials science and technology. In particular‚ owing to their extraordinary thermal conductivity
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Recently a scientist by the name of Mark Post helped create a “test tube” beef burger. The burger was grown in a solution of nutrients and cost about 330‚000 dollars to make. The burger was created by taking muscle cells from a cow and growing them into tissue. The meat had to be dyed to make it look like real beef. The meat contains no fat and is disease free. The meat was made in the Netherlands at Maastricht University. It was served to two volunteers and was flavored with egg powder and bread
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GREAT DISCOVERIES CHANGE LIVES Do you like watching television? I love it. I do not know what would I do if televisions did not exist. It is interesting‚ in several years‚ they have become a huge part of our lives‚ our indispensables. J.J. Thomson was inspired by some scientists and he provided us the opportunity of having televisions in our lives. Also other scientists improved his thoughts and experiments which leaded to the invention of the television afterwards. It is not that simple of course
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Dispersion and the speed of light “So far as problems involving light are concerned‚ the electrons (in atoms) behave as though they were held by springs”.Feynman “In a microscopic but otherwise classical analysis‚ the electric field in electromagnetic radiation accelerates electrons held by springs in the atoms of a piece of glass‚ and these accelerated electrons re-radiate in all directions. The observed light is the superposition of the electric (and magnetic) fields of the incoming
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Chapter 3: The Sounds of English. Consonants and Vowels. An Articu-latory Classification and Description. Acoustic Correlates 3.1. Consonants and Vowels. Traditional distinctions. Chomsky and Halle’s SPE definition 3.2. Criteria for consonant classification. Vocal cord vibration. Sonority 3.3. Manner of articulation. Plosives. Fricatives. Affricates 3.4. Sonorants. The Approximants: glides and liquids 3.5. Oral and nasal articulation 3.6. Force of articulation 3.7. Place of articulation 3.8. The
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Sound A. What is the definition of Sound? Sound is everything that a person‚ animal or computer can hear. It can be created in a countless number of ways and occurs from anything as simple as tapping on a table. All sounds are a series of vibrations that travel through a medium in all possible directions. The cause of sound is the vibration of an object; once the item vibrates the sound waves then radiate outwards until they are either stopped or they die out. A sound wave has three characteristics:
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its potential benefits. Provide one argument for and one argument against increasing current funding for atomic-structure research. Use specific examples from this lesson in your answers to support each position. The use of the MRI (magnetic resonance imaging) machine is a topic of debate with arguments for and against its use of this machine for medical purposes. An argument that supports the use of the MRI is that research in this field of atomic structure has already led to numerous advances
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What is the biggest animal ever to exist on Earth? By considerable measure‚ the largest known animal on Earth is the blue whale. Mature bluewhales can measure anywhere from 75 feet (23 m) to 100 feet (30.5 m) from head to tail‚ and can weigh as much as 150 tons (136 metric tons). That’s as long as an 8- to 10-story building and as heavy as about 112 adult male giraffes! These days‚ most adult blue whales are only 75 to 80 feet long; whalers hunted down most of the super giants. Female blue whales
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A Sound of Thunder is a short story written by Ray Bradbury which belongs to the genre of science fiction. Set in a near future where time travel is possible‚ this is the story of a travel agency‚ Time Safari Inc.‚ that arranges hunting trips back in time to hunt dinosaurs. In this case‚ a nervous hunter‚ Eckels‚ steps off the trail‚ and steps on a butterfly. The historical repercussions of the death of a single butterfly‚ compounded by millions of years of effects‚ leaves the hunters to return to
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Lab Sheet 1. In the lab activity‚ you will examine sound waves as they are emitted from a moving source. Predict what will happen to the sound waves when the sound source is in motion. Record your prediction (hypothesis) as an “if then” statement. (For example: If you select the GO button‚ then the train will move) If the sound source is moving‚ as it get closer to the person it will get louder and the farther away it gets it starts to fade. 2. Select the boy icon. Select the lowest pitch by selecting
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