absolute zero (-459 degrees Fahrenheit‚ 0 degrees Kelvin‚ -273 degrees Celsius) to liquid nitrogen temperatures (-321 F‚ 77 K‚ -196 C)‚ they have no electrical resistance. The temperature at which electrical resistance is zero is called the critical temperature (Tc) and varies with the individual material. For practical purposes‚ critical temperatures are achieved by cooling materials with either liquid helium or liquid nitrogen. The following table shows the critical temperatures of various superconductors:
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IS3230 Lab 5 Chris Wiginton ITT Technical Institute‚ Tampa FL Instructor: David Marquez 17 April‚ 2014 1. What are the three major categories used to provide authentication of an individual? a) something you know (e.g.‚ a password) b) something you have (e.g.‚ a certificate with associated private key or smart card) c) something you are (a biometric) 2. What is Authorization and how is this concept aligned with Identification and Authentication? a) Authorization is the process of determining
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SOLID WASTE SEGREGATION AND RECYCLING IN METRO MANILA: HOUSEHOLD ATTITUDES AND BEHAVIOR Ma. Eugenia C. Bennagen‚ Georgina Nepomuceno and Ramil Covar June‚ 2002 ACKNOWLEDGEMENTS This study was made possible through a research grant from the IDRC/EEPSEA to the Resources‚ Environment and Economics Center for Studies‚ Inc. (REECS). The authors acknowledge with great appreciation
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Electricity can be produced by burning "municipal solid waste" (MSW) as a fuel. MSW power plants‚ also called waste to energy (WTE) plants‚ are designed to dispose of MSW and to produce electricity as a byproduct of the incinerator operation. The term MSW describes the stream of solid waste ("trash" or "garbage") generated by households and apartments‚ commercial establishments‚ industries and institutions. MSW consists of everyday items such as product packaging‚ grass clippings‚ furniture‚ clothing
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Devices Other Equipment Procedure Synthesis of Aspirin Crystalizing the Aspirin Recrystallizing the Crude Aspirin Finding the Melting Point Range Safety Precautions Acetic Anhydride Sulphuric and Salicylic Acid Heating Observations Mass of Aspirin Synthesized Melting Point Calculations Percentage Yield Maximum Yield Crude Product Final Product Melting Range Percentage Error Crude Product Final Product Conclusion and Analysis Discussion Suggested Modifications to Procedure
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crystals. In selecting a solvent consider that like likes like. Polar compounds dissolve polar compounds and non-polar compounds dissolve non-polar compounds. Solvent will dissolve a large amount of the impure compound at temperatures near the boiling point of the solvent the compound would be completely insoluble in that solvent at room temperature or at zero oC 2. Impure benzoic acid was dissolved in hot water. The container of solution was placed in an ice-water bath instead of being allowed cooling
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Extraction and Evaporation & Identifying a Constituent of “Panacetin” Recrystallization& Melting-Point Measurement Organic Chemistry Lab Introduction: Panacetin purportedly includes sucrose‚ aspirin‚ and acetaminophen. However‚ the accuracy of Panacetin’s contents has been called into question by the Association for Safe Pharmaceuticals. Therefore‚ the lab must discover the accuracy of the ingredients listed on Panacetin’s label. The unknown
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Visualising solid shapes Solid shapes A solid shape is a 3-dimensional shape‚ one that has depth‚ width and breadth. Examples: pyramids‚ cubes and spheres .(such as a ball) One - Dimensional Shapes A figure that has only length is called One– Dimensional Figure. For example line‚ line segments‚ ray‚ etc. One-dimensional figure does not have any width or thickness. Two – Dimensional Shapes The shape of an object located in some space is a geometrical description of the part of that space occupied
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DISTILLATION ABSTRACT Distillation‚ one of the most significant method for separating a liquid mixture and its components‚ is a process that relies on differences by the ease of vaporization of the components. The purpose of this process is either the separation of a mixture of volatile components from nonvolatile materials is carried out by a simple distillation in which the material is placed to distill and heated‚ the vapor from the substance is removed and condensed. In this activity
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Bette Nesmith Graham As electric typewriters came into widespread use after World War II‚ Bette Nesmith Graham and countless other secretaries let out a collective groan. The new machines did make typing easier‚ but their carbon-film ribbons made it impossible to correct mistakes neatly with a pencil eraser. As a result of this predicament‚ Graham ended up inventing one of the most widely used office products of the 20th century. Born in 1924 in Dallas‚ Texas‚ Bette Graham dropped out of high
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