Separation of a Mixture of Solids Essays

Separation of a Mixture of Solids Essays Separation of a Mixture of Solids Essay Separation of a Mixture of Solids Essay The mixed solution contained benzene acid, iron, table salt, and sand. When separated using water, fuel, or a magnet, their characteristics and properties changed. The mass of the entire mixed solids was 6. 6 grams. When the magnet was used, the iron was immediately picked up. The mass for that was 1. 7 grams. The table salt was 1. 2 grams. Benzene acid mass was 0. 8 grams and the sand was 1. 4 grams after being separated. Introduction The objective of this lab was to separate and examine different solutions within a elution. In order to separate each element different methods and techniques were used. Separating the Iron filings wasnt difficult or lengthy; however It did require patience and a steady hand. Separating the benzene acid and the table salt took the longest because it needed to air dry causing the water to evaporate. Methods While the water was boiling with the table salt, sand, and benzene acid, the water got thick. It was difficult to separate the solids because they would get stuck to the bottom of the Styrofoam cup. In order to separate the iron flings a magnet was used. The solution first needed to be spread out on a piece of paper. As the magnet was ran over the solution, the iron filings were picked up. It took several tries to get all of the iron picked up. To separate the sand, the burner and distilled water was used. As it boiled, it had to be stirred to make sure it was completely dissolved. Having done this twice ensures that the salt and the benzene acid are completely removed from the sand. An Ice bed was necessary to observe the benzene acid crystallizing. The Ice deed allowed the burning benzene acid to cool down and change appearance and texture. The sand had to be over low heat to be completely dry. No sand splattered which made it effective for the data. To separate the benzene acid, filtration was used. The mass of the filter paper was 1. 1 grams. The ice bath was used again to chill the distilled water in the cylinder. The table salt and benzene crystals were poured into the funnel filter paper. This had to be left to air dry overnight. To separate the sand, the Styrofoam cup had to also be left aside overnight for It to be completely dry. Results After each solid was separated, they were able to be weighted. The solids weighted were iron filings, sand, table salt, and benzene acid. Data Table: Experiment Data Grams Percent of mixture Iron flings 33. 3% Sand 1. 4 27% Table salt 1. 2 23. 5% Benzene acid 0. 8 15. 7% Total 5. 1 99. 5% Discussion This lab concluded that properties are contributory when it comes to separating solids. Using the magnet to gather all the iron filings was very effective, though it did take several tries. Solubility played a huge part in this lab. Each solid took a different amount of time and a different method to become separated due to solubility. This lab did bring up a few questions. For example, would the mass of the table salt or the benzene acid be different if it was boiled rather than air dried? What would happen if the sand was actually air dried rather than boiled? I wonder if their properties would have changed as well. The disadvantage with my data table is the totals. It does not equal 100, though it is very close. Solubility was definitely key in this lab.

The Holocaust Essay Example | Topics and Well Written Essays - 750 words - 1

The Holocaust - Essay Example The horrific actions of the Third Reich are well documented. The end result of the Nazi’s evil ideologies included the occupation of most European nations and the ‘final solution,’ the annihilation of over six million Jews (Dawidowicz, 1986: 3). Throughout history, many nations have conquered others for various reasons while oppressing its people but why were a particular race of people systematically killed? How could such a fervent hatred of Jews infect an entire national conscience causing such unconscionable acts to be perpetrated? In spite of popular opinion, it didn’t happen because the people of Germany fell into a hypnotic trance and all of a sudden felt compelled to murder innocents simply from hearing Hitler’s speeches.Many citizens of Germany were unaware of the Concentration Camps, including the residents of the towns where the camps were located. The executions were carried out by the German army with SS troops in charge of the operation s. The unknowing German people and the most fervent of Nazi’s did have a nationalistic idealism in common, however, which was the underlying reason for the extermination of the Jewish race. This common idealism was developed from the culmination of centuries of German cultural bonding through the ideas of Volkism, with roots that had begun the century before.

System Analysis and Design Essay Example | Topics and Well Written Essays - 2000 words

System Analysis and Design - Essay Example Failure to display them could result to a loss of customers to her immediate competitors thus resulting to the loss of a chance to increase her sales or it may also make the customers unable to deduce whether she may be selling the product that they need. In order to solve this issue within a minimal space that her store has she makes use of a limited storage space within the back of her store to stock a few extra product quantities so as to dodge running out of stock. This may be said to call for her employees’ help in restocking shelves often when need arises. Carol may also be said to have suppliers who make deliveries within a particular time scheduled by her and them; they may be said to be her store’s only opportunities to obtain supplies; thus there might be a need for a timely order of products. All these, in our view, could be extremely tedious and costly since she might often be forced to employ workers to help in the arrangement of goods within the display sh elves. The key objective of this project may be to implement an effective DBMS, which would enable Carol: To keep an accurate product inventory, whether on display or within the store room; To alert Caro or her employees in case there might be need for a restock of the display shelves with goods from the store room, then later updating the inventory with the restocked amount; To making a preparatory timely placement order from every supplier; Business benefits and recommendation The primary business benefit that needs to be enjoyed from the use of the new system is for Carol’s store to maintain its level of competitiveness within the market at low costs. Other intermediate benefits may include: Improved record keeping Cut down on the errors brought about by the manual order processing Reduce the levels of staffing within phone-order and mail-order processing Cause increment of turnover through the tracking of popular items’ sales as well as slow movers. Efficient movem ent of products from the store to the display shelves thus resulting to more sales due to the consumer awareness created. Timely delivery of goods from suppliers, which would in turn result to an efficient flow of goods to consumers thus cutting down on deficits The creation of new channels of marketing as a result of efficient display and timely supply; After the review of the planning process, it could be recommended that the system be implemented. This could be because the cost incurred in its development may not exceed the advantages enjoyed by the store together with the community at large immediately the employee training process and the installation process are complete. This may be because it can be considered cost effective yet advantageous. System capabilities An extremely new and fresh Database Management System would be implemented, installed and further maintained. In order to ensure that the business benefits are obtained: This database would be sure to make a provisio n that may track as well as update information on inventory when products ought to be delivered, moved to the display shelves from the store room, sold or even entirely removed from the inventory. The database would also be able to make a provision of information about the products stocked within the store every time new supplies are made. This may, therefore, provide Carol with a perfect opportunity to make timely orders, effective displays as well as

John Deere Time line Essay Example for Free

John Deere Time line Essay Deere married his first wife, Demarius Lamb, in January 1827. The newlyweds perceived to have 5 children, Francis Albert, Jeanette, Ellen, Francis Alma and Charles. Demariuss past away and Deere married Lucinda Lamb, in June 1867. They had four children together Emma, Hiram, Alice and Mary. John Deere was an Illinois blacksmith from the Midwest and inventor. John Deere realized the wood and cast iron plow invention currently being used was weak and not working to its full ability. 1837- John Deere invents the first steel plow in his shop located in grand detour, IL. This let the pioneer farmers cut cleaner and faster furrows through the Midwest’s sticky prairie soils. 1838- John Deere evolved into John Deere, manufacturer co. 1842- John Deere business added retailing, taking orders for the patent Cary Plow. 1843- Deere and Leonard Andrus become co-partners in the art and trade of blacksmithing, plow-making and all things thereto†¦ 1848- The growing plow business moves to Moline, Illinois, 75 miles southwest of Grand Detour. Moline offers water power and transportation advantages. Deere chooses a new partner, Robert N. Tate, who moves to Moline and raises the rafters on their three-story blacksmith shop by July 28. 1849 A work force of about 16 builds 2,136 plows. 1852 Deere buys out his partners. For the next 16 years, the company is known variously as John Deere, John Deere Company, Deere Company, and Moline Plow Manufactory. 1853 Sixteen-year old Charles, Deeres only living son, joins the firm as a bookkeeper following graduation from a Chicago commercial college. 1858 The business totters during a nationwide financial panic. Maneuverings to avoid bankruptcy shuffle ownership and managerial arrangements. John Deere remains president, but power passes to 21-year-old Charles Deere. He will run the company for the next 49 years. 1863 The company makes the Hawkeye Riding Cultivator, the first Deere implement adapted for riding. 1864 John Deere obtains the companys first actual patent for moulds used in casting steel plows. Another follows in a few months and a third the next year. 1867 Charles Deere sues Candee, Swan Co., a competitor, for trademark infringement. The case has precedent-setting implications for trademark law. Could Deere preempt the word Moline which it has been using in its advertising, so that no similar product could incorporate it? The ultimate answer is no. The Walking Cultivator is patented in August 1867. Although farmers might prefer riding, the lower cost of this unit makes it sell even though the man has to walk in soft ground while straddling a row of corn. 1868 After 31 years as a partnership or single proprietorship, the concern is incorporated under the name Deere Company. There are four shareholders at first, six within a year. Charles and John Deere control 65 percent of the stock. 1869 Charles Deere and Alvah Mansur establish the first branch house, Deere, Mansur Co., in Kansas City. A semi-independent distributor of Deere products within a certain geographic area, it is the forerunner of the companys current farm and industrial-equipment sales branches and sales regions.

Cognitivism Essay -- Psychology Essays

Cognitivism Cognitivism is considered the dominant approach in psychology today. The dramatic shift from behaviorism to cognitivism occurred in the early part of this century. After years of almost exclusively behaviorist research, psychologists and educators became discontent with the limitations of behaviorism. Although behaviorism encouraged observable and measurable research in the field of psychology, it did not incorporate mental events. This paper will present a general overview of the origin of cognitivism and a discussion of three widely accepted cognitive theories—the Atkinson-Shriffin stage model, Craik and Lockhart’s levels of processing theory, and the parallel distributed processing approach. Finally, this paper will briefly summarize some ways that cognitivism has influenced instructional design theories. Origin of Cognitivism The origin of cognitivism can be traced back to the early part of this century when the Gestalt psychologists of Germany, Edward Chase Tolman of the United States, and Jean Piaget (1896-1980) of Switzerland had a tremendous influence on psychology and the shift from behaviorist theories. Behaviorists argued that mental events were impossible to observe and measure and could not therefore be studied objectively. Consequently behaviorists could not explain the ways learners attempt to make sense of what they learn. Cognitivists proposed that through empirical research and observation inferences could, indeed, be drawn about the internal, cognitive processes that produce responses. According to Matlin, Cognitive psychologists generally agree that the birth of cognitive psychology should be listed as 1956†¦During this prolific year, a large number of researchers published influ... .... (1990). The child’s conception of the world. New York: Littlefield Adams. Piaget, J., Gruber, H. (Ed.), & Voneche, J.J. (Ed.). The essential Piaget (100th Annicersay Ed.). New York: Jason Aronson. Renner and others. (1976). Schumaker, R. (1996). Anniversary: Jean Piaget—A foundational thinker. UNESCO Courier, n11, 48-49. Scott, B. D. (1997). Constructivism: Teaching for understanding of the Internet. Communications of the ACM, v 40n10, 112-117. Striebel, M. (1995). Instructional plans and situationed learning. In G.J. Anglin (Ed.), Instructional technology: Past, present, future (2nd ed). (ppl. 145-166). Englewood, CO: Libraries Unlimited, Inc. Vygotsky, L. & Vygotsky, S. (1980). Mind in society: The development of higher psychological processes. Cambridge: Harvard University Press. Vygotsky, L. (1986). Thought and language. Boston: MIT Press.

Iiillegal Logging

According to Filipino officials, rampant illegal logging and mining were likely a part of the cause for the high casualty count from Category 5 Typhoon Bopha (Pablo), especially in the Compostela Valley where government officials had warned people to stop the illegal activities. So far, 370 people have been found dead on the island of Mindanao with another 400 missing. Waters rose so high even emergency shelters were inundated. â€Å"If you abuse nature, nature will get back at us,† Benito Ramos, executive director of National Disaster Risk Reduction and Management Council (NDRRMC), said. This is due to decades of mining and logging. Our forests are already deluded and there are tunnels left by small-time miners. † Illegal logging and mining has stripped many hillsides bare in Mindanao, which has forest cover of only 10 percent. Deforestation means flash floods flow unimpeded, leading to cataclysmic land and mud slides that can bury whole towns. â€Å"The water was as h igh as a coconut tree,† a local farmer, Joseph Requinto, told the Associated Press. â€Å"All the bamboo trees, even the big ones, were all mowed down. † Unfortunately these tragic environmental disasters are becoming a recurring theme in the Philippines, less than a year Typhoon Sendong killed over 1,200 people on the same island. The extensive destruction wrought by this storm—which impacted over 300,000 people—was also blamed at least partly on illegal logging. Logging has banned throughout the Philippines since February of 2011 in order to avert disasters such as this, but illegal logging remains a rampant problem. Yet, while illegal logging and mining certainly worsened the death toll of Typhoon Bopha, there may another component to the storm's wrath: climate change. Warmer world may equal worse typhoons, hurricanes â€Å"Climate change is now a clear and present danger and a national security concern for our country,† Filipino Senator, Loren Legarda, said last year after the devastating Typhoon Sendong. Scientists continue to debate the connection between climate change and hurricanes and typhoons (both names for tropical cyclones). However a general consensus is emerging that while climate change may not increase the total number of hurricanes, it is likely increasing the extremely intense ones, much like Hurricane Sandy that struck the U. S. East Coast a little over a month ago. Climate change is intensifying tropical cyclones in a number of ways: rising sea levels create worsening storm surges, while a warmer atmosphere draws in more water from the oceans leading to increased precipitation, worsening the chance for flash floods such as those spawned by Bopha. In addition, unseasonably warms seas may be extending both the tropical cyclone season and its geographical reach: Typhoon Bopha hit a region of Mindano that has never been hit by such extreme cyclones. It also hit late in the season. We have never had a typhoon like Bopha, which has wreaked havoc in a part of the country that has never seen a storm like this in half a century. And heartbreaking tragedies like this is not unique to the Philippines, because the whole world, especially developing countries struggling to address poverty and achieve social and human development, confront these same realities,† Naderev Sano, climate negotiator for the Philippin es, said today in an impassioned speech at the 18th UN Climate Summit in Doha, Qatar, which has been crawling along the last two week. Sano pointed to the disaster as more evidence to move aggressively on climate change at a conference where observers say little progress is being made. â€Å"I appeal to the whole world,† Sano continued. â€Å"I appeal to leaders from all over the world, to open our eyes to the stark reality that we face. I appeal to ministers. The outcome of our work is not about what our political masters want. It is about what is demanded of us by 7 billion people. I appeal to all, please, no more delays, no more excuses. Please, let Doha be remembered as the place where we found the political will to turn things around. † Anti-poverty and environmental NGOs are largely pointing the finger at wealthy countries—especially the U. S. , Canada, and New Zealand—for failing to raise their pledges on emissions cuts and providing little information on where climate financing will come from. The host nation, Qatar, has also come under heavy criticism for bringing little to the table, even though it is the world's largest greenhouse gas emitter per capita.

Enron An American Organization - 2262 Words

Enron Corp. was an American organization based in Houston which had its interest in Natural Gas, Electricity, Communications, Pulp and Paper. It was formed after the federal deregulation of natural gas pipelines, by merging Houston Natural Gas company and InterNorth by Kenneth Lay in 1985. This company grew at a very fast pace, from a pipe line company in the 1980’s to become the world’s largest energy trader. Enron was named ‘America’s Most Innovative Company’ by Fortune for six consecutive years. Before it filed for bankruptcy on Dec 2, 2001, Enron was considered a very big player in the market, which claimed revenues of $111 billion during 2000. Definition of Key Terms SPE:- Special Purpose Entities SEC:- U.S. Securities and Exchange Commision Rise and Fall of Enron The Beginning Enron was formed in 1985 after the deregulation of natural gas pipelines. it was formed from the merger of Houston natural gas and InterNorth. 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