Christopher Columbus :: Christopher Columbus Essays

  Ã‚  Ã‚  Ã‚  Ã‚  Christopher Columbus was an Italian navigator who sailed west across the Atlantic Ocean in search for the all-water route to Asia, but instead achieved fame for making landfall in the Caribbean Sea. Columbus' plan was based in part on two major miscalculations. First, he underestimated the circumference of the world by about 25 per cent. Columbus also mistakenly believed that most of the world consisted of land rather than water. This mistake led him to conclude that Asia extended much farther east than it actually did. In 1492, Columbus embarked on his first voyage. Queen Isabella of Spain ordered that the port of Palos supply him with three ships the Pinta, the Nina, and the Santa Maria. A total of about 90 crew members sailed aboard the three ships. In addition to the officers and sailors, the expedition included a translator, three physicians, a servant for each captain, a secretary, and an accountant. On October 12, 1492, at 2:00 in the morning he spouted a small island, which he called San Salvador. In January, the Santa Maria was wrecked off the coast of Espanola. The Nina, with Columbus in command, along with the Pinta began the homeward voyage in January 1493. The storms drove the ships first to the Azores and then to Lisbon, Columbus arrived in Palos, Spain, in March. He was enthusiastically received by the Spanish Monarchs. Columbus planned immediately for a second expedition, with about 1500 men, which left Spain in September 1493. They landed on the island of Dominica, Gaudeloupe. His stop at Puerto Rico is the closest he came to setting foot on land that would later form part of the United States, the main foundation for the claim that Columbus â€Å"discovered America.†   Ã‚  Ã‚  Ã‚  Ã‚  When Columbus returned to Queen Isabella on September 29, he found that serious conflicts had developed among the colonists, a number of whom were already on the route to Spain to press their grievances. One of the major problems confronting Columbus was the hostility of the natives, whose initial friendliness had been alienated by the cruelty of the Europeans. Columbus defeated the natives in battle in March 1495 and shipped a large number of them to Spain to sell as slaves. Queen Isabella objected, however, and the survivors were returned. A royal investigating commission arrived at Isabella in October 1495. Because this group was consistently critical of his policies, Columbus established a new capital named Santo Domingo.

Making a buffer

Name Date experiment performed   CRN of lab section: Grade: Days late: Instructor Initials: General Grading Items 25 Points Attendance at Pre-lab MeetingCopies of lab pages attached; labeled with name and date, complete information, readable, data recorded matches results given in report| /5| Waste was properly disposed of and lab area was cleanedEvaluation of student performance overall (student was on time, followed safety rules, performed the lab correctly and within the time allowed, etc) Total for General Grading Items Data Analysis and Interpretation Part | 75 Points| Titration Curves| /25|Question 1Question 2Question 3Total for Data Analysis and InterpretationData Table Buffer A| Buffer B| Mass of NaC2H3O2 used to prepare buffer (grams)Volume of buffer prepared (mL) 100. 0| 100. 0Molar concentration of HC2H3O2 in buffer (M) Initial pH of bufferVolume of 0. 5 M NaOH to raise pH by 2 units (mL)Volume of 0. 5 M HCl to lower pH by 2 units (mL)Volume of 0. 5 M NaOH at equivalence point (mL)Data AnalysisWrite reaction equations to explain how your acetic acid-acetate buffer reacts with an acid and reacts with a base.Buffer capacity has a rather loose definition, yet it is an important property of buffers. A commonly seen definition of buffer capacity is: â€Å"The amount of H+ or OH– that can be neutralized before the pH changes to a significant degree. † Use your data to determine the buffer capacity of Buffer A and Buffer B. (Graphically, we can identify buffer capacity by the sudden change to a very steep slope. )Say, for example, that you had prepared a Buffer C, in which you mixed 8. 203 g of sodium acetate, NaC2H3O2, with 100. 0 mL of 1. 0 M acetic acid. a. What would be the initial pH of Buffer C? b. If you add 5. 0 mL of 0. 5 M NaOH solution to 20. 0 mL each of Buffer B and Buffer C, which buffer’s pH would change less? Explain.

Was President Richard Nixons Vietnamization Policy a...

Was President Richard Nixon’s Vietnamization policy a success or a failure, and to what extent? A. Plan of Investigation The investigation assesses the level of success President Richard Nixon’s Vietnamization policy attained during the Vietnam War to end U.S. involvement in the war. In the strive to evaluate the level of success this policy demonstrated, the investigation evaluates the ability of the policy to equip, expand, and train Southern Vietnamese forces and allocate them to a substantial combat position, all while simultaneously reducing the quantity of U.S. combat troops in a steady manner. The Vietnamization policy is investigated and analyzed by both its causes and effects. The motivation that led to Nixon’s creation of this†¦show more content†¦This meant that all of Vietnam was united and communist. The question here is: was President Nixon’s Vietnamization policy a success or a failure? This topic is debated amongst historians to this day, yet the most popular answer is that the Vietnamization policy was a failure. On the contrary, the policy did encompass several advantages despite its failure. Firstly, the primary purpose of the Vietnamization policy was to substitute the U.S. combat troops with Southern Vietnamese troops, especially given that it was their country, and the fact that U.S. involvement was portraying a division among American Mohan 3 Candidate #: 001503-0062 society. It may be inferred that that part of the Vietnamization policy was a success, as it worked. The part that failed and brought about an unsuccessful end to the Vietnamization policy was getting the Southern Vietnamese forces to have the moral dedication and ambition to defend their own country and keep Communism away. Furthermore, it must be stated that the reason for the failure of the Vietnamization policy was not just due to the failure of the Southern Vietnamese military, as the people themselves as a whole were not seeking victory for their nation. The Southern Vietnamese population simply wanted to avoid defeat in and of itself. Additionally, the U.S. leaders were unaware of the grim results of their struggles to