pineapples) and flowers. In most cases‚ such natural products get their properties from a mixture of organic compounds. In this experiment you will prepare two esters of o-hydroxybenzoic acid‚ more commonly known as salicylic acid. One of the esters‚ acetylsalicylic acid‚ is aspirin‚ the common analgesic. We will synthesize aspirin by mixing salicylic acid with acetic anhydride. The second ester product is oil of wintergreen‚ or methyl salicylate‚ which we prepare by allowing salicylic acid to react with methyl
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build of overlapping discoveries‚ something very similar to calculus itself. The question over the creation of the branch of mathematics has become one of the fiercest rivalries in modern history - that between Isaac Newton and Gottfried Leibniz. In 1666 (and perhaps earlier)‚ when Newton was 23 - he had begun work on what he called “the method of fluxions and fluents‚” effectively what we know as calculus. Newton’s discovery of calculus was mainly a result of practical use - he needed a method to solve
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The Tuskegee Experiment In 1932‚ in the area surrounding Tuskegee‚ Macon County‚ Alabama‚ the United States Public Health Service (PHS) and the Rosenwald Foundation began a survey and small treatment program for African-Americans with syphilis. Within a few months‚ the deepening depression‚ the lack of funds from the foundation‚ and the large number of untreated cases provied the government’s reseachers with what seemed to be an unprecedented opportunity to study a seemingly almost
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Elton Mayo: The Hawthorne Experiment George Elton Mayo: The Hawthorne Experiment Purpose The purpose of this paper is to explore the management theory of George Elton Mayo and how it applies to the current status of management in business today. This will include the examination of the behavioral aspect of management by studying Elton Mayo ’s Hawthorne Experiment and its conclusions. Introduction George Elton Mayo was born the second child of an Adelaide‚ South
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GILBERT NEWTON LEWIS passed away on March 23‚ 1946 in Berkeley‚ California in his laboratory at the University of California when he was working on an experiment with liquid hydrogen cyanide‚ and deadly fumes from a broken line had leaked into the laboratory causing him to have a heart attack‚ at the age of 70. Lewis was born on October 23‚ 1875 in Weymouth‚ Massachusetts. He was educated at home by his parents. He learned how to read at a very young age and was well educated until age thirteen when
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unanimous majority even when this majority seems to be wrong. For this study Asch showed groups of people two cards‚ one of them had a line‚ called standard line‚ and the other card had 3 more lines then the participants had to select which line of the second card was the same height of the line in the first card. The majority of members of each group were confederates and had to answer wrong to see how the minority would answer. Asch found out that about 30% of the minority conformed to the majority
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Title Experiment with a spiral spring (Oscillation) Objective 1. To show how the time of vertical oscillation depends on the load 2. To determine the spring constant 3. To determine the effective mass of the spring Introduction In this experiment‚ it is to show how the time of vertical oscillation depends on the load‚ to determine the spring constant and to determine the effective mass of the spring. An ideal spring is remarkable in the sense that
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level. The objective of this experiment is to study the characteristic of four different types of membrane. The membranes used in this experiment are polyamide film ( AFC 99 ) as membrane one ‚ polyamide film ( AFC 40 ) as membrane two ‚ cellulose acetate (CA 202 ) as the third membrane and PVDF (FP 100 ) that act as the fourth membrane. In order to identify the characteristic of all four membranes‚ experimental procedures should be done. The variable for this experiment is the membrane maximum inlet
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Part I - Illumination Experiments (1924-27) These experiments were performed to find out the effect of different levels of illumination (lighting) on productivity of labour. The brightness of the light was increased and decreased to find out the effect on the productivity of the test group. Surprisingly‚ the productivity increased even when the level of illumination was decreased. It was concluded that factors other than light were also important. Part II - Relay Assembly Test Room Study (1927-1929)
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the okay to do the experiment‚ I grabbed the girls and went to work. The experiment I picked was the conservation concept‚ where the idea that merely changing the appearance of objects does not necessarily change other key properties. In other words‚ just because I put the same amount of water in a bigger case‚ doesn’t change how much water there is. I predict that both the girls would fail at conservation concept‚ and always
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