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# modelo circular informativa empresa

### Centrifugal pump - Saylor.org

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Centrifugal pump A centrifugal pump is a rotodynamic pump that uses a rotating impeller to increase the pressure of a fluid. Centrifugal pumps are commonly used to move liquids through a piping system. The fluid enters the pump impeller along or near to the rotating axis and is accelerated by the impeller, flowing radially outward into a diffuser or volute chamber (casing), from where it exits into the downstream piping system. Centrifugal pumps are used for large discharge through smaller heads. History Warman centrifugal pump in a Coal Handling and Preparation Plant (CHPP) application According to Reti, the Brazilian soldier and historian of science, the first machine that could be characterized as a centrifugal pump was a mud lifting machine which appeared as early as 1475 in a treatise by the Italian Renaissance engineer Francesco di Giorgio Martini.[1] True centrifugal pumps were not developed until the late 17th century, when Denis Papin made one with straight vanes. The curved vane was introduced by British inventor John Appold in 1851. How it works Like most pumps, a centrifugal pumps converts mechanical energy from a motor to energy of a moving fluid; some of the energy goes into kinetic energy of fluid motion, and some into potential energy, represented by a fluid pressure or by lifting the fluid against gravity to a higher level. The transfer of energy from the mechanical rotation of the impeller to the motion and pressure of the fluid is usually described in terms of centrifugal force, especially in older sources written before the modern concept of centrifugal force as a fictitious force in a rotating reference frame was well articulated. The concept of centrifugal force is not actually required to describe the action of the centrifugal pump. In the modern centrifugal pump, most of the energy conversion is due Cutaway view of centrifugal pump to the outward force that curved impeller blades impart on the fluid. Invariably, some of the energy also pushes the fluid into a circular motion, and this circular motion can also convey some energy and increase the pressure at the outlet. The relationship between these mechanisms was described, with the typical mixed conception of centrifugal force as known as that time, in an 1859 article on centrifugal pumps, thus:[2] Centrifugal pump To arrive by a simpler method than that just given at a general idea of the mode of action of the exterior whirlpool in improving the efficiency of the centrifugal pump, it is only necessary to consider that the mass of water revolving in the whirlpool chamber, round the circumference of the wheel, must necessarily exert a centrifugal force, and that this centrifugal force may readily be supposed to add itself to the outward force generated within the wheel; or, in other words, to go to increase the pumping power of the wheel. The outward force generated within the wheel is to be understood as being produced entirely by the medium of centrifugal force if the vanes of the wheel be straight and radial; but if they be curved, as is more commonly A centrifugal pump uses a spinning "impeller," the case, the outward force is partly produced through the which normally has backward-swept blades that medium of centrifugal force, and partly applied by the vanes to directly push water outward. the water as a radial component of the oblique pressure, which, in consequence of their obliquity to the radius, they apply to the water as it moves outwards along them. On this subject it is well to observe that while the quantity of water...

### Aspire Serie 5715Z/5315 - ftp

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### Trail of Tears Tennessee - National Park Service

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The Tennessee Trail of Tears story is one of removal camps and detachment routes. Cherokee driven from their homes in Georgia and North Carolina arrived in Tennessee, where they waited to be organized into “detachments” to take them to Indian Territory (present-day Oklahoma), a home they never wanted. Even so, Tennessee’s legacy today remains rich in Cherokee culture. At the time the Treaty of New Echota was signed, southeast Tennessee was not only the location of the seat of the Cherokee government in Red Clay, but also the home of about 2,500 Cherokee. Prominent leaders Hair Principal Chief John Ross Conrad, James Brown, 1828-1866 Jesse Bushyhead, Lewis Ross, and Principal Chief John Ross all had homes in Tennessee. They lived in communities scattered across the hills and valleys and along the rivers and creeks. Most Cherokee farmed the fertile soils. Some owned prosperous plantations, stores, taverns, and ferries. Throughout the years, several mission schools, such as Brainerd, near Chattanooga, provided a place for Cherokee children to learn to read and write in English and to attend Christian church services. In many respects, Cherokee Tennessee Trail of Tears The “Sun Circle” at Ross’s Landing, Chattanooga Artwork by Harry Fenn The circular Cherokee design to the left symbolizes the holy sun in the form of sacred fire sent by the Creator. The central cross depicts the four logs that keep the sacred fire alive. It is said that the Cherokee will survive as long as the sacred fire burns. Ferry at Chattanooga In 1816, brothers John and Lewis Ross established the settlement of Ross’s Landing. It consisted of a ferry, warehouse, and ferry landing site We are now about to take our final leave and kind farewell to our native land the country that the Great Spirit gave our Fathers, we are on the eve of leaving that Country that gave us birth. It is the land of our fathers…our sons, and it is (with sorrow) that we are forced by the authority of the white man to quit the scenes of our childhood, but stern necessity says we must go, and we bid a final farewell to it and all we hold dear East of the Father of Waters, the Majestic Mississippi -Letter by George Hicks Dated November 4, 1838 to John Ross Traveling through Tennessee The detachment of the people are very loth [sic] to go on, and unusually slow in preparing for starting each morning. I am not surprised at this because they are moving not from choice to an unknown region not desired by them. Fort Cass 1838 historic map of the Fort Cass area Highlighted in blue are the removal camps that were spread across the valley. communities did not differ much from those of their American neighbors. In 1838, though, Cherokee life was about to change. Beginning in late May 1838, thousands of Cherokee, enslaved African Americans, and Creek were taken from their homes by troops and held at removal camps near one of three emigrating depots. Two of these camps were located in the vicinity of Cherokee communities in Tennessee: Ross’s Landing, now known as Chattanooga, and Fort Cass in presentday Charleston. During removal, Fort Cass served as the center for the largest emigrating depot. Removal camps in this area were spread out over a 12- by 4-mile area, extending from Charleston southward. Approximately 7,000 Cherokees were held at these camps prior to their departure to Indian Territory, but poor conditions at the camps led to rapid outbreaks of disease, and many perished before the journey began. How many more families would lose their loved ones before reaching their new homes? -Detachment Conductor Elijah Hicks, October 24, 1838 The Cherokee used many different routes to reach their new home in the West—most started in Tennessee. In June, three groups of Cherokee left Ross’s landing to begin their journey to Indian Territory. Dire conditions, disease, and deaths plagued the last two groups. As a result, Principal Chief John Ross and other Cherokee leaders petitioned the US government to allow the Cherokee to control the remainder of their removal. Permission was granted and the remaining Cherokee were organized into detachments of about 1,000 each.

### SAFETY SHEET # 11 GRINDING MACHINERY Consult the Ontario ...

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Consult the Ontario Occupational Health and Safety Act and its Regulations, more specifically the Industrial Establishments – Reg 851, as well as the relevant CSA Standard (B173.5) for detailed information on grinding machinery. A grinding wheel is defined as an expendable wheel that carries an abrasive compound on its border; generally made from a matrix of coarse particles pressed and bonded together to form a solid, circular shape A ring test (also referred to as an acoustic test) is a method to check if the wheel is in proper working order. To conduct the test, hold the grindstone by its centre and lightly tap the grindstone in four opposite corners with a non-metallic object (wooden mallet, plastichandled screwdriver) and listen at every tap; a clear (metallic “ring”) sound indicates a solid grindstone while a muffled (dead) sound indicates the grindstone is cracked; see “How to conduct a ring test” (http://www.ccohs.ca/oshanswers/safety_haz/abrasive_wheels/wheels.html); any wheel that is cracked should be discarded. A competent person is defined by the Ontario Occupational Health & Safety Act as a person who (i) is qualified because of knowledge, training and experience to organize the work and its performance; (ii) is familiar with this Act and the regulations that apply to the work and (iii) has knowledge of any potential or actual danger to health & safety in the workplace. Hazard Classes: Consult the Self-Assessment Form (http://www.iapa.ca/pdf2/irsst_Grinder.pdf) for more information • Mechanical – abrasions, contusions and fractures can occur if you are using a damaged grinder wheel; • Heat – burns – ensure that fire extinguishers are adequately placed and no flammable products in the area; • Chemical / Biological – irritation, dermatitis, intoxication, infection – change the cooling fluid when necessary; check that there are no hazardous substances; • Physical – high noise levels can slowly hinder hearing capabilities; ear muffs/plugs are recommended; • Ergonomic – muscular-skeletal disorders (http://www.ccohs.ca/oshanswers/diseases/rmirsi.html) and back aches caused by orientation / setup of drill press among other factors; • Electrical – unplug the equipment when performing maintenance; ensure that the equipment is properly grounded Prior to Starting the Grinder: • Competent person shall be assigned to the mounting, care, and inspection of abrasive wheels and grinding machines. • All workers operating a grinding machine shall wear the appropriate personal protective equipment relevant to the particular hazards (safety glasses, face shield, respirator, hearing protection etc.) • Inspection shall be conducted and documented; then regular inspections shall be conducted and records made available. • Manuals and operating instructions for the grinding machine shall be made available to all workers. • Check the manufacturing date on the grindstone label; dispose of expired ones. • A grinding machine shall be inspected for defects prior to mounting (by conducting a ring test), and shall be mounted in accordance with the manufacturer’s specifications (wheel properly mounted between flanges; guard(s) securely in place etc.) • All rotating motor components are enclosed with adequate guarding materials • A grinding machine shall be provided with protective hoods that enclose the wheel (as close to the wheel as the work will...

### Algebra and Functions Geometry and Trigonometry Statistics and ...

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Contents Unit 1 Reasoning and Proof Unit 2 nequalities and Linear I Programming Unit 3 Similarity and Congruence Unit 4 Samples and Variation Unit 5  olynomial and Rational P Functions Unit 6  ircles and Circular C Functions Unit 7 Recursion and Iteration Unit 8 nverse Functions I Visit us at www.glencoe.com ISBN: 978-0-07-877261-0 MHID: 0-07-877261-3 www.glencoe.com   Algebra and Functions   Geometry and Trigonometry   Statistics and Probability   Discrete Mathematics 2nd Edition James T. Fey • Christian R. Hirsch • Eric W. Hart Harold L. Schoen • Ann E. Watkins with Beth E. Ritsema • Rebecca K. Walker • Sabrina Keller Robin Marcus • Arthur F. Coxford • Gail Burrill i_TP_FM_877261.indd This material is based upon work supported, in part, by the National Science Foundation under grant no. ESI 0137718. Opinions expressed are those of the authors and not necessarily those of the Foundation. Copyright © 2009 by the McGraw-Hill Companies, Inc. All rights reserved. Except as permitted under the United States Copyright Act, no part of this publication may be reproduced or distributed in any form or by any means, or stored in a database or retrieval system, without prior permission of the publisher. Send all inquiries to: Glencoe/McGraw-Hill 8787 Orion Place Columbus, OH 43240-4027 ISBN: 978-0-07-877261-0 (Student Edition) MHID: 0-07-877261-3 (Student Edition) Core-Plus Mathematics Contemporary Mathematics in Context Course 3 Student Edition Printed in the United States of America. 5 6 7 8 9 10 WDQ 17 16 15 14 13 12 11 Core-Plus Mathematics 2 Development Team Senior Curriculum Developers James T. Fey Advisory Board Diane Briars Collaborating Teachers Mary Jo Messenger University of Maryland Pittsburgh Public Schools Christian R. Hirsch (Director) Jeremy Kilpatrick Howard County Public Schools, Maryland Western Michigan University University of Georgia Eric W. Hart Robert E. Megginson Maharishi University of Management University of Michigan Harold L. Schoen University of Cambridge Jacqueline Stewart Okemos, Michigan Graduate Assistants Allison BrckaLorenz Christopher Hlas Kenneth Ruthven University of Iowa David A. Smith Ann E. Watkins University of Iowa Duke University California State University, Northridge Contributing Curriculum Developers Beth E. Ritsema Western Michigan University Mathematical Consultants Deborah Hughes-Hallett University of Arizona / Harvard University Stephen B. Maurer University of Maryland Swarthmore College Rebecca K. Walker William McCallum Grand Valley State University University of Arizona Sabrina Keller Doris Schattschneider Michigan State University Moravian College Robin Marcus Richard Scheaffer University of Maryland Gail Burrill Michigan State University (First edition only) Principal Evaluator Steven W. Ziebarth Dana Cox Dana Grosser Anna Kruizenga Nicole Lanie Diane Moore Western Michigan University University of Florida Arthur F. Coxford (deceased) University of Michigan Madeline Ahearn Geoffrey Birky Kyle Cochran Michael Conklin Brandon Cunningham Tim Fukawa-Connelly Evaluation Consultant Norman L. Webb University of Wisconsin-Madison Technical Coordinator James Laser Undergraduate Assistants Cassie Durgin University of Maryland Rachael Kaluzny Jessica Tucker Western Michigan University Western Michigan University Western Michigan University

### Recruiters' Scorecard - Wall Street Journal

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This ranking is based on how recruiters rated each school on 21 attributes, their future plans to recruit at the school, and the number of survey respondents who said they had recruited recently at the school. These schools enjoy a national reputation and tend to draw recruiters from many of the same companies, usually large national and multinational firms that pay high starting salaries. 2006 RANK 2005 RANK This ranking, a mix of European, North American and Central American schools, is based on how recruiters rated each school on 21 attributes, their future plans to recruit there, and the number of companies hiring a high percentage of the school’s graduates for jobs outside the U.S. Because of a methodology change, this year’s ranking cannot be compared with last year’s results. 2006 RANK UNIVERSITY (BUSINESS SCHOOL) University of Michigan (Ross) Dartmouth College (Tuck) Carnegie Mellon University (Tepper) Columbia University University of California, Berkeley (Haas) Northwestern University (Kellogg) University of Pennsylvania (Wharton) University of North Carolina, Chapel Hill (Kenan-Flagler) Yale University Massachusetts Institute of Technology (Sloan) University of Chicago Duke University (Fuqua) University of Virginia (Darden) Harvard University University of Southern California Cornell University (Johnson) New York University (Stern) Stanford University University of California, Los Angeles (Anderson) UNIVERSITY (BUSINESS SCHOOL) ESADE IMD IPADE London Business School Thunderbird (Garvin) Columbia University Tecnológico de Monterrey (EGADE) Massachusetts Institute of Technology (Sloan) University of Western Ontario (Ivey) INCAE University of California, Berkeley (Haas) Instituto de Empresa York University (Schulich) University of Chicago IESE HEC Paris University of Pennsylvania (Wharton) Insead Erasmus University (Rotterdam) Harvard University Bocconi University University of Toronto (Rotman) New York University (Stern) Stanford University

### SOLICITUD DE EMPLEO ... - Primer Empleo

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### Solicitud de Empleo

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### Solicitud de pago único - Servicio Público de Empleo Estatal

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Solicitud de pago único Abono en un único pago del valor actual del importe de la prestación contributiva Subvención de las cuotas de cotización a la Seguridad Social Abono del importe de la prestación contributiva y Subvención del importe de las cuotas de cotización a la Seguridad Social (Si sólo solicita alguna de las dos primeras modalidades de abono, renuncia a una posterior solicitud de la otra modalidad). Antes de rellenar cada apartado, lea atentamente las “Instrucciones para cumplimentar la solicitud” de la carpeta informativa. Forma de constitución para el desarrollo de la actividad Socio trabajador de sociedad laboral Trabajador autónomo Socio trabajador de cooperativa Trabajador autónomo con discapacidad Tipo de prestación En el caso de ser socio trabajador Nueva creación Socio trabajador de sociedad mercantil Tipo de colectivo Incorporación Fecha de grabación del derecho (A cumplimentar por el SEPE)

### SOLICITUD DE EMPLEO FOTO - Ministerio de Educación - Guatemala

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