Prehistoric Times - Beginning of the Christian Era (Black Magic) * 1700 BC King Hammurabi’s reign over Babylon In ancient Babylon King Hammmurabbi began to classify metals such as gold ‚ iron‚ and copper. He also gave certain materials higher value than others‚ depending on the potential of the material. Known metals were recorded and listed in conjunction with heavenly bodies. 430 BC Democritus of ancient Greece Democritus and the atom: c.420 BC In the late 5th century BC Democritus
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Chemistry of cosmetics Few people would whip out a chemistry set‚ uncork the vials‚ and slap the compounds on their face. Yet‚ millions of women and girls essentially do that every day when they unzip their makeup bags and apply lipstick‚ mascara‚ and other makeup. Like the compounds in a chemistry set‚ makeup consists of chemicals. Although the chemicals in cosmetic products are intended to improve the appearance of skin‚ lips‚ and lashes‚ some can cause adverse effects. Emulsions The majority
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Syllabus Syllabus details HL and SL core Topic 1: Business organization and environment Content HL/SL core 1.1 HL extension Learning outcomes HL/SL core HL additional Nature of business activity Identify inputs‚ outputs and processes of a business. Describe how business activity combines human‚ physical and financial resources to create goods and services. Explain the role of the different business departments in overall business activity. What is a business? Business functions ·
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The Inorganic Chemistry of Carbon Inorganic Carbon For more than 200 years‚ chemists have divided compounds into two categories. Those that were isolated from plants or animals were called organic‚ while those extracted from ores and minerals were inorganic. Organic chemistry is often defined as the chemistry of carbon. But this definition would include calcium carbonate (CaCO3) and graphite‚ which more closely resemble inorganic compounds. We will therefore define organic chemistry as the study
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Low Voltage Analog Circuit Design Techniques: A Tutorial IEEE Dallas CAS Workshop 2000 Edgar Sánchez-Sinencio March 27‚ 2000 http://amsc.tamu.edu/ Texas A&M University Analog and Mixed-Signal Center Low Voltage Analog Circuit Design Techniques: Roadmap Low voltage (LV) power supply circuit design techniques are addressed in this tutorial. In particular: (i) Introduction; (ii) Transistor models capable to provide performance and power consumption tradeoffs; (iii) Low voltage
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and focal point are principles of art that draw attention to specific locations in a work. Emphasis is the principle by which an artist draws attention to particular content. A focal point is a specific place of visual emphasis in a work of art or design. Most works of art have at least one area of emphasis and multiple focal points. Those few artworks that do not have areas of emphasis or focal points usually have little or no variation. An artist can emphasize focal points through the use of line
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BIO 120 General Biology I Note-taking/Study Guide Chemistry What is chemistry? Define energy Define potential energy and give an example Define kinetic energy and give an example Define matter Describe the three states of matter? Define elements Define atoms What are the three subatomic particles? What are their charges? Where are they found in the atoms? Define atomic number. Use the periodic table to determine the atomic number of various elements. Define mass number. Use the periodic table
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Economics IA Commentary Coversheet Economics Commentary Number: | HL Number 1 | Title of Extract: | UK Unemployment | Source of Extract: | HRM – Human Resource Management | Date of Extract: | 11th of November 2009 | Word Count: | 661 | Date Commentary was written: | 28/11/2009 | Section of Syllabus that the Commentary relates to: | Section 3.5 - Unemployment | Candidate Name: | Yuriy Boldyrev | Candidate Number: | 001124003 | *Note: Commentaries should be read in chronological
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Chemistry and Society Teresa Miller University of Phoenix CHM 110 September 9‚ 2014 William De Vorick Chemistry is defined as the branch of science that deals with identification of the substances of which matter is composed; the investigation of their properties and the ways in which they interact‚ combine‚ and change; and the use of these processes to form new substances. Chemistry is important to my everyday life and society because everything exists because of chemistry
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Polymer Chemistry Classification of Polymers – Notes prepared by The most common way of classifying polymers is to separate them into three groups - thermoplastics‚ thermosets‚ and elastomers5. The thermoplastics can be divided into two types - those that are crystalline and those that are amorphous. You may click on the words in the diagram below to learn more about these classifications. Thermoplastics Molecules in a thermoplastic are held together by relatively weak intermolecular
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