39. The Viscosity of Liquids After studying the present lecture‚ you will be able to Define viscosity and viscosity coefficient Outline the method to measure viscosity using Ostwald viscometer Determine the average molecular weight of a polymer Determine the surface concentration of 1-butanol in aqueous solution Measure the distribution coefficient of a solute betweenn two solvents 39.1 Introduction Viscosity‚ one of the transport properties‚ arises because of intermolecular attractive and
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dimensions on the nanoscale have properties different than those observed for the bulk material. For example‚ quantum dots can exhibit single-electron tunneling carbon nanotubes can have high electrical conductivity and mechanical strength and thin polymer films can have glass-transition temperatures higher or lower than thick films. There is an expectation that new technologies will emerge from the fabrication of nanostructures and nanostructured materials and also that nanofabrication will have new
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Chapter I INTRODUCTION Plastics found everywhere. Bottles‚ utensils‚ food packagings are some examples of plastics that we use and see in our daily lifestyle. We can easily have plastics for our convience because it was sold in our market directly thus spending a little of our money. Behind these things our typical perception about plastic is just a bit of what plastics really are. For those people who are concious about our environment ‚ they say that plastics cause a wide environmental problem
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7 properties of Bio 1. Order 2. Reproduction 3. Growth and Development 4. Energy Processing 5. Response to the enverionment 6. Regulation 7. Evolutionary adaptation Biosphree; all of the elements that support lifewater land lower atmosphere madagascar Ecosystem; all organisms living in a particular area. Forrest in Madagascar Community- array of organisms. Birds snakes trees. All organisms in the forest Population- Group of ringtaiiled monkeys ‚ all individuals in a single area
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air‚ forming a thread. Before synthetic fibers were developed‚ artificially manufactured fibers were made from cellulose‚ which comes from plants. These fibers are called cellulose fibers. Raw materials: Synthetic fibers are made from synthesized polymers or small molecules. The compounds that are used to make these fibers come from raw materials such as petroleum based chemicals or petrochemicals. These materials are polymerized into a long‚ linear chemical that bond two adjacent carbon atoms. Differing
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JOSEPHINE F. KHONGHUN SPECIAL EDUCATION CENTER WAWANDUE‚ SUBIC‚ ZAMBALES 4TH Prelim Test in ADVANCED CHEMISTRY NAME: SCORE: YEAR AND SECTION: DATE: I. MATCHING TYPE. Match column A with column B. Write the letter in Column B that matches the item in Column A on the space provided. ( 1 pt each) A. B. ______1. Deposits of organic materials A. petroleum ______2. Complex mixture of hydrocarbons principally alkanes
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For the scientist’s experiment the scientist will be experimenting with additives and gel. We will be adding different substances such as table salt‚ citric acid‚ and sugar. The scientist’s problem statement is “What kind of substances make gel the strongest?” The independent variable will be the different additives (Table salt‚ citric acid‚ and sugar) which will be added using tablespoons. The dependent variable is the strength of the gel which will be measured using a scale of 10. The constant
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Various types of Fuel Cells and their working By : Divykant Vishwakarma 03996404910 EEE 2nd shift S.No. 14 Fuel Cell A fuel cell is a device that converts the chemical energy from a fuel into electricity through a chemical reaction with oxygen or another oxidizing agent. Hydrogen is the most common fuel‚ but hydrocarbons such as natural gas and alcohols like methanol are sometimes used. Fuel cells are different from batteries in that they require a constant source of fuel and oxygen/air
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early atmosphere - earth roughly 4 billion yrs old - created by volcanoes erupting + releasing gases - contained mostly co2 + water vapour - earth cooled + water vapour condensed to form oceans - co2 dissolved into oceans + used to form marine organism shells which were compacted to form sedimentary rock - plants evolved to photosynthesise‚ takingin co2 + releasing oxygen - scientists don’t kno where all nitrogen came from bc they weren’t there to record evidence but most theories suggest
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maltose = α-glucose + α-glucose sucrose = glucose + fructose lactose = glucose + galactose germinating seeds phloem tissue‚ fruit milk β-glucose fructose O maltose starch glycogen cellulose chitin = = = = polymer of glucose polymer of α-glucose polymer of β-glucose polymer of glucosamine (glucose with an amino acid attached) chloroplast stroma muscle cells plant cell wall exoskelteton of arthropods O O O O cellulose Monosaccharides and Disaccharides Monosaccharides and disaccharides
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