How surface area of vanes effect Essay Example for Free

How surface area of vanes effect Essay Hypothesis I predict that by increasing the surface area of the vanes on the wind vane, I will increase the air resistance therefore slowing the rate at which the weight will drop. Primary Work If a piece of paper and a marble are in free fall, they will fall at the same speed, so they should hit the ground at the same time. If you test this by just dropping a marble and a piece of paper you will find it is not true. This is because the objects are not in free fall. To be in free fall, gravity has to be the only force acting on the objects. When you just drop something, there is also air resistance. Air resistance is a type of fluid friction. Because friction acts in the opposite direction of the objects motion, air resistance of an object falling downward is an upward force. This is because a falling object is coming down, so the opposite direction is up. If air resistance were equal for every object, objects would still fall at the same rate. Since we know they do not fall at the same rate, we know air resistance is different for different objects. The amount of air resistance acting on an object depends on the objects surface area. If an object has a small surface area, it will have little air resistance. Because the piece of paper has a larger surface area than the marble, the marble will have less air resistance than the piece of paper and the paper will fall slower. This is what I expect to happen with a wind vane. As the wind vane turns, air resistance will act on each of the separate vanes. By increasing the surface area of the vanes, I will increase the air resistance therefore making the rate at which the weight drops slower, because there is more opposing force. Theory Newtons law of gravity and Galileos freefall theory state that objects of any mass will fall to the ground at the same time if in a complete vacuum i. e. space, if not in a complete vacuum i. e. earth, they will fall at different times because of air resistance (and weight). The air resistance depends on the surface area of the object, the larger the surface area, the more amount of air resistance. In the case of a wind vane, the objects dropping are the separate vanes. Plan Of Experiment I will drop a 15g weight from a piece of string; this string will be attached to an axel which is further attached to a wind vane. Firstly the string will be coiled around the axel then when let go, the weight will drop and the wind vane will turn to create opposing force. I will time the rate at which it falls. My dependant factor will be the time the weight takes to hit the table. My independent factor will be the surface area of the vanes. To ensure a fair test, my controls will be the distance from the table and the weight of the falling object. Apparatus   Stand Clamp 20g Weight 55cm of String   Axel   Cork With Equal Slits For Vanes   Card For Vanes   Stopwatch Method 1. I will set up the equipment as shown below. 2. I will cut out 6 vanes with a certain surface area and put them into their corresponding slits in the cork. 3. I will coil the string attached to the weight around the axel and then drop it. I will time the time it takes for the weight to hit the table and record my results. 4. I will repeat the experiment for accuracy of results Results Surface Area (cm) 1st Try (secs) 2nd Try (secs) Average (2. d. p) 3 1. 8 1. 6 1. 7 4 2. 4 2. 3 2. 35 5 3. 2 3. 4 3. 3 6 3. 9 3. 7 3. 8 7 4. 4 4. 3 4. 35 8 4. 7 4. 5 4. 6 9 5. 4 5. 7 5. 55 10 6. 3 6. 5 6. 4 Graph Of Averages = Line Of Best Fit Conclusion I have found that I was right in my hypothesis in thinking that the larger the surface area of the vanes on a wind vane, the more time it takes for a weight attached to it by means of an axel to fall. This was because, as stated in my theory and primary work, the surface area increased the amount of air resistance and this force opposed gravity which was pulling the weight down, therefore making it travel slower. This is shown in my graph as a positive correlation. Evaluation I had no major anomalous results, this was down to accurate measuring and because I kept my experiment fair. After doing this experiment I would like to be able to calculate the actual amount of air resistance created by a wind vane and see if there is any relationship between surface area and amount of air resistance.

Politics and Political Sciences :: Political Governmental Essays

Politics and Political Sciences What is political science? It is the study of the mechanism that people employ for their protection, better known as a government. When looking up the word government in the dictionary the word authority is used repeatedly. To many people the type and extent of authority over them is very important. So, which is the best kind of government? Is it the monarch or the republic? It is important to look at the difference between monarchs and republics and how they came about. Monarchies are usually run by a king or queen. These rulers are heads of the government because of birth. Of course, not all monarchs are the same, some are more powerful than others. There are three kinds of monarchs limited, constitutional, and an absolute. The least powerful of the group is the limited monarch. They usually have no political power and are just a historical figure. The country is run by the prime minister. A good example of this is England. Queen Elizabeth makes public appearances and ceremonies. The truth is she has no decisions in political decisions. She can not make laws of or deal with any similar issue, but is still a very important part of England's tradition. There can be different titles in different countries. For example in Japan the Emperor is like the king or queen of England. The constitutional monarch has more powers than the limited monarch, but they are restricted. The countries constitution puts the king, queen, prime minister, and parliament below the law. They can make laws and policies or veto, however, parliament must give their consent. Some countries that are constitutional monarchs are Norway, Sweden, and Denmark. The final and most powerful monarchs are absolute monarchs. In these countries The king or queen have absolute control over the country. At one time all monarchs used to be absolute. The king or queen is the law, the Parliament can suggest ideas but he or she has the final say. Absolute powers today include Saudi Arabia and Kuwait, however, in these countries the head authority is called the Amir. The other form of government is a republic. In the dictionary it is that said that a republic is a form of government where the power is in the citizens who are allowed to elect their representation. However, it is better said, a country without a king or queen and is not a monarch because not all republics are the same.

Engineers Need to Know About Economics

Title of presentation Engineering students should learn economics. I chose this topic because it related directly to my audience whom are mostly engineering students. Audience Knowledge level of audience My audience and I will graduated in a few years and the topic that I will deliver closely linked to my audience. Every student should aware about their challenges that they will face in the future. I hope the speech that I will convey could give some basic preparation in the future especially in managing their wealth and for preparation to start a business.How I plan to gain the audience’s attention I would like to start the presentation by sharing the statistic of bankruptcy in Malaysia due to poor managing the wealth. Mostly, the fresh graduates encounter this problem because they want to have luxury car and home at young age. Presentation 1) Introduction Purpose and importance of this topic To persuade my audience especially engineering students that they should prepare the mselves with economic skills because they need both to become good engineer. Great ideas of engineering but do not have money to implement is a failure.How the topic relevant to the audience In the modern world of today filled with the latest technology one can ever dream of, competing with others to have a good qualification in education is not an unusual phenomena. Having just engineering based knowledge is not enough to become a good engineer. It is because money is one of important factor in completing a project. Furthermore, fresh graduates also need to manage their wealth well since a lot of graduates facing problem because lack of information about the loans that they have made. Thesis statement:Engineers students should prepared themselves with economic empowerment so that they could manage their wealth, help them in starting their own business or during managerial period. Main points: * Economics is important in helping fresh graduates to manage their money well. * To prepa re engineers before they get promotion as a manager. * Engineering graduates need good economics skills to start their own business. Establish credibility In this semester, I am taking Engineering Economics & Entrepreneurship course. This course were related to this topic.I also have read and researched that engineers need more than engineering based knowledge to a job in today’s world. Apart from that, many of my seniors, acquaintances have shared their experience that having a good managing money for ourselves or for company is important for working in comfort. 2) Body Organisational pattern I will use problem-cause- solution order as my organizational pattern for this presentation. Many graduates faced financial problems such as loans from bank and after that I will shared the solution to the audience.Supporting ideas for each main point. * Economics is important in helping fresh graduates manage their money well. * Of more than 1. 7 Million bankrupts in Malaysia,  there are more than 90,000 civil servants of the Malaysian government that are made bankrupt  just because they failed to pay on their car loans or being a guarantor to one. * Fresh graduates should be equipped with economics so that they know where to invest their money and helping them in making decision during making loans to buy a car or house. To prepare engineers before they get promotion as a manager. * Manage cash flow well is one of the important duty of a manager. * To become a good manager of company, engineering graduates need both engineering and business skills to avoid them from be tricked. * Engineering graduates need good economics and business skills to start their own company. * Engineering graduates need both engineering specialties and good managing the money to have a competent business. * The number of unemployed persons in this country rose to around 402,300 in July from 388,500 in June.If engineering graduates were thought how to make money from the engineering skills that they already learnt, they will have confident to start their own company and directly will decrease the number of unemployment. Transition from one point to next point I will ensure that there is coherent transition from one main point to the next main point by mentioning the order of the main points at the beginning of the presentation. In addition, to enhance the understanding about the topic, I will use linkers in my presentation such as â€Å"furthermore†, â€Å"in addition†, and â€Å"on top of that†.Summaries each point I will repeat the problem that fresh graduate will face in the future and the solutions that could help them. By doing that, audience could remember the main issue in each point. The audience should remember that managing wealth is important to live happily in future. 3) Conclusion Summaries of entire presentation I will summaries the entire presentation by recalled my audience with all the main points that I already presented. Every problem and solutions will be repeated so that my audience will remember what my speech is all about until the end of the speech.I will show great some entrepreneurs that have both specialties in engineering and business. Describe on reiterate the purpose and importance of the whole presentation to relate to your audience. I will reiterate this presentation to my audience by explaining to them that there is very important for us to start changing the myths that the knowledge that were thought in university right know are enough. It is because everyone including engineering student should well prepared themselves with basic economic skills. Q&A sessionQuestions that I anticipate from the audience * What type of knowledge that student should prepared? * What type of challenges that students will face in the future? Practice session How did I practice my speech? * I practice my speech mostly in my room roughly about 10 times. Sometimes I also practice in front my friends. Area o f my speech needed improvement * I need improvement in delivery especially in pronunciation. Time limit Without consider the environmental effect that I will have during the presentation, from the practices, I managed to stay within the time limit.

The Cask of Amontillado by Edgar Allan Poe Essay - 1693 Words

The Cask of Amontillado by Edgar Allan Poe In The Cask of Amontillado, Edgar Allan Poe uses several different artistic choices in the construction of the story. He manipulates the story to be the way he wants it to be by using the point of view of the narrator, the setting, and a common monotonous sentiment throughout. Poe is successful in maintaining a spirit of perverseness that is prevalent in most of his works. The point of view plays a very important role in influencing the readers perception of the story. The first line of the story is a good example of how the narrator attempts to bring the reader to his side right from the start. The thousand injuries of Fortunato I had borne as I best could, but when he ventured upon†¦show more content†¦Even his most prized skill, wine tasting, is described as a weak point. This puts Fortunato at a major disadvantage in the fight for the readers liking, and ultimately the fight for his life. As in most Poe stories, the narrator tries to steer the reader away from seeing the perverseness of his actions. In The Cask of Amontillado, Montresor tries to convince the reader that walling up Fortunato is his way making himself felt as such to him who has done the wrong (O’Neill 669). In reality, Poe tells the story from Montresors point of view in order to increase the astonishment and perverseness that the reader feels when reading the story. Edgar Allan Poe uses the setting in many different ways in his various works. There are two primary settings in The Cask of Amontillado, the carnival and the catacombs. There are several reasons that make the carnival the ideal setting for Poe to lure Fortunato away. It was about dusk, one evening during the supreme madness of the carnival season, that I encountered my friend (O’Neill 666). This sentence contains two important details as to why the carnival is a perfect setting for Montresors undertakings. The first is that it is dusk, which makes it harder for people at the carnival to notice what is happening, andShow MoreRelatedThe Cask of Amontillado by Edgar Allan Poe888 Words   |  4 PagesThe Cask of Amontillado by Edgar Allan Poe In ?The Cask of Amontillado?, Edgar Allan Poe takes us on a trip into the mind of a mad man. Poe uses certain elements to convey an emotional impact. He utilizes irony, descriptive detail of setting, and dark character traits to create the search of sinful deceit. Poe also uses first person, where the narrator is the protagonist who is deeply involved. The purpose is to get the reader to no longer be the observer. He wants them to see with MontressorRead MoreThe Cask of Amontillado by Edgar Allan Poe836 Words   |  3 Pagesqualities in the story. In the story many things are used as symbols such as the actual cask of amontillado, the trowel, the jester costume and the setting in which there is two in the story. Another literary technique used significantly in the story is irony. Irony is the expression of ones meaning by using language that normally signifies the opposite. In the short story â€Å"The Cask of Amontillado,† Montresor a very troubled man who plans to seek revenge on another man named FortunatoRead MoreEdgar Allan Poe And The Cask Of Amontillado1384 Words   |  6 PagesWhat makes Edgar Allan Poe work unique? Other than being a strange individual, Poe has become a remarkable literature writer. The Raven, Annabel Lee, and The Cask of Amontillado are just a few of Poe’s work that staples the theme of gothic literature. This essay will allow you to see the gothic elements Edgar Allan Poe uses through his most common poems. Gothic literature has many elements which play into its definition. The actual definition is a style of writing that is characterized by elementsRead MoreThe Cask Of Amontillado By Edgar Allan Poe906 Words   |  4 Pages â€Å"The Cask of Amontillado† â€Å"The Cask of Amontillado† was written in 1846, by Edgar Allan Poe. Born in 1809, Poe never knew any of his parents. At the age of three, his mother died of tuberculosis, and his father deserted the family before he was born. Taking care of him was his foster parents in Richmond, Virginia. They loved Poe, but were not supportive of his decisions and kept Poe poor. Having debt and not being able to provide food and clothes for himself caused Poe to quit school. Later, heRead MoreThe Cask Of Amontillado By Edgar Allan Poe920 Words   |  4 Pageswhen that trust no longer exists? In â€Å"The Cask of Amontillado† written by Edgar Allan Poe, Fortunato is about to find the answer to this question. On the surface, Montresor seems friendly with Fortunato, but deep down he feels nothing but hate for him. Could this hatred have an irrationality that only Montresor understands? In different ways, both of these men are proud and affluent, yet both have downfalls that will l ead to a tragic ending. Edgar Allan Poe’s use of language contributes to the understandingRead MoreThe Cask Of Amontillado By Edgar Allan Poe1555 Words   |  7 PagesIn his writing, Edgar Allan Poe has multiple uses of direct and indirect characterization. In The Cask of Amontillado, Montresor had rules such as â€Å"I must not only punish but punish with impunity. A wrong is unredressed when retribution overtakes its redresser. It is equally unredressed when the avenger fails to make himself felt as such to him who has done the wrong† (Poe, 2). Poe used indirect characterization to show the reader that Montresor is an unreliable narrator because he justified hisRead MoreThe Cask Of Amontillado By Edgar Allan Poe1303 Words   |  6 PagesIn Edgar Allan Poe’s â€Å"The Cask of Amontillado,† the narrator recalls an extremely significant time in his life, and takes the reader along with him. Throughout the story, one experiences a perfectly planned murder which took place over fifty years ago, and still no one has discovered what truly happened to poor Fortunato as he was chained to a wall in a room that was then closed off, and torched to death due to all the nitre in the walls. As the story goes on, the reader can see some of Poe’s unfortunateRead MoreThe Cask Of Amontillado By Edgar Allan Poe1076 Words   |  5 PagesThe short story, The Cask of Amontillado, written by Edgar Allan Poe is a story of terror and betrayal. Like many of Poe’s literary works, the story has a dark undertone with a theme of terror and depression. More than half a century ago, Marshall McLuhan argued that though Poe was fascinated by evil, the evil that he had in mind was not that of Calvinism, but that of the split man and the split civilization. In general, McLuhan was right, but in this instance Calvinism, and its God, provided a darkRead MoreThe Cask Of Amontillado By Edgar Allan Poe707 Words   |  3 PagesIn the short story of The Ca sk of Amontillado, Edgar Allan Poe writes in first person point of view from the perspective of Montresor who seeks revenge against Fortunato. Montresor began to develop the perfect plan for revenge. During the carnival season, Montresor meets with Fortunato and decides to implement his plan carefully through irony. Poe s story describes the murderer s mind which has lived as a memory of Fortunato s death for fifty years. Poe uses different types of irony and symbolismRead MoreThe Cask Of Amontillado By Edgar Allan Poe985 Words   |  4 PagesEdgar Allen Poe is a well known author of short stories and poetry from the 19th century. He is known especially for his stories of horror and suspense. The Cask of Amontillado is one of his more famous pieces. The story follows the narrator, Montresor, as he exacts revenge on Fortunato. Montressor draws Fortunato into the wine cellar where eventually he chains Fortunato to the wall and encloses him inside it. Throughout the story the narrator continually proves that he is not the most reliable source