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    Polymer Chemistry

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    together by relatively weak intermolecular forces so that the material softens when exposed to heat and then returns to its original condition when cooled. Thermoplastic polymers can be repeatedly softened by heating and then solidified by cooling - a process similar to the repeated melting and cooling of metals. Most linear and slightly branched polymers are thermoplastic. All the major thermoplastics are produced by chain polymerization. Thermoplastics have a wide range of applications because they

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    Supernova and Tc

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    PRL 106‚ 081101 (2011) Selected for a Viewpoint in Physics PHYSICAL REVIEW LETTERS week ending 25 FEBRUARY 2011 Rapid Cooling of the Neutron Star in Cassiopeia A Triggered by Neutron Superfluidity in Dense Matter Dany Page‚1 Madappa Prakash‚2 James M. Lattimer‚3 and Andrew W. Steiner4 ´ ´ ´ Instituto de Astronomıa‚ Universidad Nacional Autonoma de Mexico‚ Mexico D.F. 04510‚ Mexico 2 Department of Physics and Astronomy‚ Ohio University‚ Athens‚ Ohio 45701-2979‚ USA 3 Department of Physics and Astronomy

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    by heat. For example‚ if a sample of copper sulfate pentahydrate is heated‚ the bright blue crystals of the hydrate are converted to the white‚ powdery‚ anhydrous salt. CuSO4.5H2O(s) CuSO4(s) + 5H2O(g) Blue white During the heating of copper

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    Environmental Science

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    atmosphere Convection Currents – (vertical movement of air due to atmospheric heating and cooling) bring us day-to-day changes in our weather as they move in a general pattern from west to east. Jet Streams – veritable rivers of air‚ generated by earth’s rotation and air-pressure gradients Fronts – regions of rapid weather change Monsoons – The seasonal airflow created by major differences in cooling and heating between oceans and continents‚ usually bringing extensive rain. Proxies – measureable

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    easy to be green

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    Construction Manager Greenfield Community College 123 Greenfield Lane Greenfield‚ IL 85236 Dear Mr. Hill: As a valued customer of our company‚ we are delighted that you have accepted our business proposal to design and install energy-efficient heatingcooling‚ and insulation systems in your school. At EBG our customer is the most important thing and we work hard to fulfill each and every client’s needs. We understand you want to change the location of a venting apparatus for the overall campus design

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    Engineering Materials

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    features between human begins and other mammals has been the ability to use and develop materials to satisfy our human requirements. Nowadays we use many types of materials‚ fashioned in many different ways‚ to satisfy our requirements for housing‚ heating‚ furniture‚ clothes‚ transportation‚ entertainment‚ medical care‚ defense and all the other trappings of a modern‚ civilised society. Most materials doesn’t exist in its pure shape ‚ it is always exist as a ores . During the present century the scope

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    The Mahogany Tree

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    Beverly D. Panes January 24‚ 2013 Prof. Hazel G. Carreon 12 :30 – 3:30pm Summary Thermal Analysis The branch of material science known as thermal analysis is the study of the change of temperature within the properties of materials. A number of different properties are studied using this method including

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    and the Department of Energy to help consumers save money and energy through the use of energy-efficient products. (See References 3) Heating and Cooling The average U.S. household spends $1‚900 each year on utilities‚ with roughly half of this amount going toward heating and air conditioning costs (see References 5‚ page 2). You can improve the efficiency of heating and air conditioning units by frequently cleaning or replacing air filters and by having your furnace cleaned every year. In addition

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    benzoin and touch the capillary tube to the plate on the first two dots to spot the plate. After 30 min at reflux‚ remove the heating mantle from the RB flask so that the reaction stops boiling. Disconnect the condenser and draw up some of the reaction mixture in a fresh capillary. Reattach the condenser and spot the second and third dots on the plate. Resume heating at reflux and carefully place the plate into the TLC chamber. Place a watch glass on top to prevent evaporation of the methylene

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    Solar Energy Outline

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    Key words: Solar energy; Solar panels; Solar technology; Solar power; Solar energy policy. Background Knowledge of Solar Energy 1. Status of Solar Energy Technology 1.1 Potential of Solar Energy 1.2 Photovoltaics 1.3 Solar Thermal heating and cooling 2. Development of Solar Energy Technologies 2.1 History of Solar Energy Technologies 2.2 Barriers in Solar Energy Utilization 3. Life Cycle Analysis of Solar and Non-Solar Energy 3.1 Comparison for Centralized Power Generation Technologies

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