in response of mechanical stress. • The word is derived from the Greek piezein‚ which means to squeeze or press. • This effect is also reversible. • Deformation is only 0.1 % of the original dimension. • Piezoelectric material- quartz(SiO2)‚ barium titanate (BaTiO3) lead zirconate titanate and occasionally lithium niobate . Electromagnetic motors are notorious for consuming high amount of power and creating high ambient motor temperatures respect to USM The electromagnetic motors produce
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Robert Bunsen was born on March 31‚ 1811 in Gottingen‚ Germany. He was the youngest of four sons. Robert started schooling in the city of Holzminden‚ and then studied chemistry at Gottingen. Bunsen was awarded his doctorate in 1830 for a dissertation on different kinds of hygrometer. He was only 19 at this point in his life. Following being awarded his doctorate‚ he immediately set off on extensive travels that took him through Germany and Paris and eventually to Vienna from 1830 to 1833. All of
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and Spontaneity * exothermic reactions tend to be spontaneous * Endothermic reactions can be either * Electrolysis of water is non-spontaneous it will stop if you stop the supply of energy * DD reaction between ammonium nitrate and barium hydroxide is spontaneous‚ even through the Entropy * Measure of disorder or randomness * Can apply to system ‚ surrounding or universe as whole * S is greater when solute dissolves in a solvent * S is greater when a liquid evaporate
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Part One (Flame Test): 1. Create and complete a data table for Part One of the lab. It should include the name of the element (or unknown) examined and the color of the observed flame SOLUTION | NAME | COLOR | KNOWN 1 | BARIUM | GREEN | KNOWN 2 | CALCIUM | RED | KNOWN 3 | SODIUM | ORANGE | KNOWN 4 | RUBIDIUM | PURPLE | KNOWN 5 | POTASSIUM | BLUE | KNOWN 6 | LITHIUM | VIOLET | UNKNOWN 1 | SODIUM | ORANGE | UNKNOWN 2 | POTASSIUM | BLUE | 1. Identify each unknown
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Strontium- is named after Strontian a small town in Scotland Atomic number- 38 Symbol- Sr Mass- 87.62 Density- 2.63 g/cm3 Melting point- 7770C Boiling point- 13820C State at room temp- In room temperature strontium is an alkaline earth metal. Alkaline earth metals are silvery‚ shiny and relatively soft metals‚ they are fairly reactive and they all occur in nature‚ but are only found in Compounds and minerals‚ not in their elemental forms. Solid strength- in a room temperature environment strontium
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There are a lot of photon interactions throughout the radiologic field. These are produced when matter and excited electrons interact with each other at the same level. The photons are able to penetrate through matter without a big interaction due to the energy being absorbed in matter. The photons in this interaction are the x-ray and gamma photons. Their lives are ended when they give off their energy to an electron in need. This interaction along with the other interactions are very important
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The quiet hum of needles is a comforting sound to some people. They see it as a way to finally be able to show people who they are‚ and what they have been to‚ without having to tell them. The feeling of needles being stabbed into skin over and over and over again may hurt‚ but they see it as a small price to pay for a few hours or days in exchange for a beautiful piece of artwork that they can carry around with them for a lifetime. The view people have on tattoos today is divided‚ with some people
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Oryx is an herbivore due to eat green plants we are also called a plant-eater). Oryx eats mostly grasses‚ shrubs and also roots‚ spend most of its time grazing. Oryx is ruminants; Oryx swallows its food without chewing it. After a while‚ they repeat a partly-absorbed "cud" which Oryx chews and after that swallows for the end time. Oryx is a desert animal‚ Oryx can go for several weeks without drink water; it gets greatly of its water from the plants that Oryx
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men only bind him tighter. Once they have passed the Sirens’ island‚ Odysseus and his men must navigate the straits between Scylla and Charybdis. Scylla is a six-headed monster who‚ when ships pass‚ swallows one sailor for each head. Charybdis is an enormous whirlpool that threatens to swallow the entire ship. As instructed by Circe‚ Odysseus holds his course tight against the cliffs of Scylla’s lair. As he and his men stare at Charybdis on the other side of the strait‚ the heads of Scylla swoop
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“Saving Sourdi” by May-Lee Chai and “A Good man is Hard to Find” by Flannery O’Connor. In the short stories “Saving Sourdi” and “A Good Man is Hard to Find” symbolism is used to foreshadow and explain the characters’ views on life or death. In “A Good Man is Hard to Find” there are various uses of symbolism including the Misfit’s car‚ the town‚ Toomsboro‚ the family passes through on their journey‚ and the forest they crash in. The Misfit’s car is described as a “big black battered hearse-like automobile”
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