Friday, February 7, 2020

Convection, Conduction and Radiation Essay Example | Topics and Well Written Essays - 1500 words

Convection, Conduction and Radiation - Essay Example The energy transferred from one system to another is called the internal energy. Internal energy is, although not in all cases, is proportional to temperature. Essentially, the transfer of energy or heat starts from the system with the higher temperature to the system with the lower temperature. The higher the internal energy of the system, the higher is the temperature of the system. However, there are cases when there are no changes on the temperature of the system even though there was an increment on the internal energy of that system. Such case will be explained later as part of the examples of conduction. There are several ways on how to transfer energy or heat: thermal convection, thermal conduction and thermal radiation or simply called convection, conduction and radiation. These three modes of transfer of energy have different operations going on. This particular study aims to explain heat transfer via the three methods aforementioned. Keywords: conduction, convection, radia tion, internal energy, heat, system HEAT TRANSFERS: CONVECTION, CONDUCTION, AND RADIATION 3 Thermal Convection Thermal convection, also known as convection, is a transfer of heat from one object to another wherein the heat travels in motion through liquids. In Physics, fluids include liquid substances, gases, and some plastic solids. When the temperature of a liquid rises, the liquid becomes lighter or less dense; nevertheless, if the temperature of the liquid decreases, it becomes denser and it relatively falls down. In thermal convection, what happens is that when there is a massive motion by the liquids like gases or liquid substances, it tends to create a circular motion since a solid body, when heated, transfers the energy to the liquid. Convection takes place when the liquid that was heated becomes lighter and therefore rises. When it reaches the top of the circulation, the temperature of the liquid decreases, hence, making it denser which causes it to fall down. The cycle cre ates convection current. Further, free convection takes place when the movements of the fluids are caused to move by the buoyant forces as a result of varying densities brought about by the rapid changed in the temperature. Forced convection, on the other hand, takes place when the fluid gets in contact with the surface of the solid system using outside or external means. There are several examples that will help us clearly understand the principles behind thermal convection. If you happen to observe when you boil pasta or beans, the moment the water (liquid) reaches its boiling point, the beans or the pasta moves up and down and from side to side or it triggers the pasta or the beans to move in random directions. The explanation of this HEAT TRANSFERS: CONVECTION, CONDUCTION, AND RADIATION 4 particular scenario as what have been explained earlier is that, the moment the temperature of the liquid increases, it becomes less dense or lighter causing it to rise above the surface and wh en it reaches the top and it cools down, which means there is a relative decrease on the temperature, it becomes denser and therefore falls down which creates a cycle. The changes on the temperature and the density of the liquid are principal factors causing the rising and falling movement of the pasta and the beans. The portion where

Wednesday, January 29, 2020

The Way in Which Wordsworth Presents Emotion in Strange Fits of Passion Essay Example for Free

The Way in Which Wordsworth Presents Emotion in Strange Fits of Passion Essay Emotion is a central theme in ‘Strange fits of passion’; even in the title we have â€Å"Passion†, shown in the Poet’s feelings for Lucy and in the sudden (seemingly unfounded) idea that â€Å"Lucy should be dead† Overseeing the whole scene we also have the moon, used by Wordsworth to counterpoint the Poet’s Journey to â€Å"Lucy’s cot†. As he draws closer to the cottage the moon descends until suddenly â€Å"the planet dropped† which in turn causes the Poet to have a startling thought exclaiming â€Å"O mercy! † â€Å"If Lucy should be dead! † moving the Poet from a dazed half-sleep to startled alertness, as the feeling of dread overwhelms him. Given the rather jaunty ballad rhyming structure and rather tongue-in-cheek opening stanza, we could assume that the Poet is indulging in slight self-mockery at this notion, seen as ridiculous in hindsight. Or given some of the other imagery used, such as the moon’s slow decline—which given its romantic connotations could symbolize the decline and end of the Poet’s relationship with Lucy—and the analogy to a â€Å"rose in June†, we could assume that the Poet is reflecting on this incident with sadness regarding his memories of Lucy. This idea is further supported by the themes of the other â€Å"Lucy Poems†, namely loss. Poems such as â€Å"Three Years She Grew in Sun and Shower† and She dwelt among the untrodden ways showcase the Joy of the Poet in Lucy’s company and feelings of great sorrow at her demise. While it is unlikely that the women featured in the â€Å"Lucy Poems† are one and the same, it makes no difference to the common feelings expressed throughout the poems. As stated above, the poem is written in the style of a ballad (as indeed all the â€Å"Lucy Poems† are, though none as obviously as â€Å"Strange fits of passion†), using the Common language of the people, as Wordsworth was often wont to do. This enables the reader to have an immediate reaction to the work, generally one of amusement at the â€Å"fond and wayward thoughts† of the Poet which is then gradually turned to a feeling of sorrow at the eventual death as implied in the â€Å"Strange fits of passion† and made plain in the other â€Å"Lucy Poems† and in the omitted last stanza from â€Å"Strange fits of passion† I told her this; her laughter light Is ringing in my ears: And when I think upon that night My eyes are dim with tears This reaction, in a way, shadows the Poet’s emotional response. In fact, it could be argued that there is a similar reaction from the reader to the Poet’s emotional state throughout, at first we are warned that this tale is for â€Å"lover’s ear alone† setting us up for a romantic, if slightly farcical, story. As the Poet sets out to Lucy’s cottage with rapt anticipation, we too anticipate the characteristic â€Å"reveal† of Wordsworth poetry. We at first part in our reactions when the poet draws near the cottage, as the Poet has his sudden revelation; while he is struck by despair and fear we are temped to laugh at his seemingly ludicrous thought. This position is then taken by the Poet himself once he is safely in Lucy’s company but his â€Å"wayward thought† is proven all to shrewd, as reader and Poet both weep at Lucy’s demise.

Tuesday, January 21, 2020

population :: essays research papers

The Immigration Debate   Ã‚  Ã‚  Ã‚  Ã‚  Migration is a natural condition of humankind. People have traditionally moved voluntarily hope of freedom and economical, cultural and educational opportunities. As of recent there has been a conflict of interest in terms of immigration. Mr. John Isbister shows both sides in his book, The Immigration Debate. Although Mr. Isbister shows both sides on immigration, he is clearly proimmigration. He says, â€Å"immigrantscontribute positively to the quality of American life and that immigration is consistent with the moral values that Americans hold closest†isbister 4). He says immigratswill continue to add to America’s melting pot theory.   Ã‚  Ã‚  Ã‚  Ã‚  He starts his book talking abouhistory ofnited States policy. The Alien and Sedition Acts of 1798 wereenacted as part to deny asylum toEuropean supporters of Democracy. The Immigration Act of 1924 was the first permanet limitation on immigration, established the â€Å" national origins quota system†(). This act set a quota of immigrants to the United States at two percent of the number of persons of a given nationality residing in the United States. Since quotas were based on the proportions of the U.S. population, the system greatly favored northern Europeans and discriminate against Asians. The quota system was finally abolished in The Migration Refugee Assistance Act of 1962. The act opened opportunities for families to reunify. Many refugees came from Cuba and Latin America. This actr surprisingly increased the number of non white immigrants. Now crowds of Hispanic and Asains can be found throughout the entire nation. Mr. Isbister says that the new infl ux of Hispanics and Asains is cyclical and that the population will control itself. The first cycle happened from 1820 to 1967, nearly 90 percent of all immigrants were from Canada or Europe. From the Migration Refugee Assistane Act of 1962, Mexico and other Central American countries were the maority of immigrants. Only thirteen percent of immigrants were from Europe.   Ã‚  Ã‚  Ã‚  Ã‚  Now there happens to be a huge influx of illegal immigrants. To control the illegal aliens Congress passed the Immigration Reform and Control Act in 1986. This act punished employers who hired undocumented immigrants. It also granted citizenship to illegal aliens who had been residing in the United States for several years. No one really knows how many illegal immigrants there are living in the United States, but estimates say there are about four to five million illegals leaving here, almost all of them are non-white.

Monday, January 13, 2020

Paper cut

Dynasty, paper cuts have a close relationship with the custom activities and the drama (#5). People are likely to watch drama so that there are lots of dramas in that period of time. For instance, â€Å"The Romance of The West Chamber† Rid) is one of the drama in Yuan dynasty. People usually cut red paper into different characters with background according to the drama for different uses, they may sell them or use as decoration. During Mining and King Dynasty, paper cuts become common among ordinary people, paper cuts are common to see in different festivals such as autumn festivals and drama.On the other hand, paper cuts are widely used in decorating the indoor part of the palace. The paper cuts designs include Dragon, Phoenix, and Bat, and these designs are used to decorate the ceilings of the hall and the walls of the corridors . Up to now, paper cuts is losing its status in the society, people are unwilling to participate in the inheritance of paper cuts. People therefore have fewer opportunities to reach this kind of folk art but they still can find paper cuts at old laces and some traditional buildings.Traditionally, women and girls in the countryside have to take in charge of making embroidery, let alone, the paper cuts. This is used to be a craft that every women must know how to do in their life. It even uses this craft to distinguish whether the bride is good or bad. Every year, they usually take part in the making embroidery after the harvest period, while they have spare time, they will start doing paper cuttings in order to do preparation for the coming year. These paper cuts are used to decorate the windows

Sunday, January 5, 2020

Freud s Theory Of Psychosexual Stages Of Development And...

Abstract Freud’s theory of psychosexual stages of development and Costa and McCrae’s Five Factor model were compared to assess the personality of a woman named Judy, experiencing difficulty in her primary relationships and day to day functioning. The main purposes of the study is to explain how each theorist would assess Judy’s behavior and identify the strengths and weaknesses of each approach and further the differences and any similarities found. The key strength of Costa and McCrae’s model was providing a detailed and structured analysis of personality that is scientifically based however was limited in explaining the origin of Judy’s personality. Freud’s observational method using the Rorschach has little scientific evidence however his theory did provide explanations for how Jane’s personality developed. While there were many differences some similarities were also found with the most interesting that final assessments were similar, with a possible same diagnosis which indicated that even across two every different theories and theorists there is agreement in how personality is ultimately assessed. Compared Personality Assessment using Freud’s Psychosexual Stages theory and Costa and McCrae’s Five Factor Model In assessment of this case study about Judy, Costa and McCrae’s trait theory and Freud’s psychoanalytic theory will be considered and compared. Personality assessment’s purpose is to identify, define and measure important characteristics usingShow MoreRelatedPersonality Theories5586 Words   |  23 PagesPersonality Theories Almost everyday we describe and assess the personalities of the people around us. Whether we realize it or not, these daily musings on how and why people behave as they do are similar to what personality psychologists do. Personality psychology looks at the patterns of thoughts, feelings, and behavior that make a person unique. Some of the best known theories in psychology are devoted to the subject of personality. Almost everyday we describe and assess the personalities ofRead MorePsychology Workbook Essay22836 Words   |  92 PagesI. INTRODUCTION Objective I.1 Define psychology: the science of behavior and mental processes. |Margin Learning Question(s) (if applicable) |Page(s) | |None | | Key Terms Psychology: the science of behavior and mental processes. Exercises 1. Put a check mark

Friday, December 27, 2019

William Shakespeare s Much Ado About Nothing - 3544 Words

When examining the plays written by Shakespeare there are many instances where the common theme of marriage is shows. In the times of the 1600’s the ceremony of marriage was very common and done in a very orderly and strict fashion. In those time there was no aspects of a genuine love and heart felt marriage but instead they were seen as an agreement between the two parties. In many of the works of Shakespeare many characters deal with the issue of marriage and you begin to see the toll if had on many women involved in these types of marriages. In many different reviews, Journals and other scholarly works shows that there is proof of how the idea of women played a major role in the lives of women and how they were to be treated.†¦show more content†¦The first question he ask Don Pedro is Claudio says â€Å"Hath Leonato any son, my Lord† (1.1.240). To add to this point the next line which Don Pedro responds by saying â€Å"No child but Hero. She’s his on ly heir. Dost thou affect her, Claudio† (1.1.241). This here proves that Claudio has a motive to be part in this contractual marriage with hero because of the fact that since she is the only heir and will be her Husband he then knows that he will than get all the amenities of Leonato. Since Claudio asked the question if Leonato had any sons strongly showed the simple fact that he wanted to be involved for the simple fact it was going to benefit him. In the end of it all it truly shows how he uses it to benefit him whether or not the love was genuine or just to further himself. The point here is that Claudio’s loyalty to the marriage† can be understood by his reaction to what Don John tells him about Hero. In the initial conversation Don John about accuses Hero of being disloyal to Claudio. Claudio states â€Å"if there be any impediment , I pray you discover it†(3.277). The language Claudio uses is straight from the couple that â€Å"if either of you know any impediment, why ye may not be lawfully joined together in Matrimony, ye do now confess† (The Form of Solemnization of Matrimony† in The Book of Common Prayer). Claudio wants there to be reason for an impediment. As the conversation between the two men continues Don John becomes very direct about why he’s accusing Hero. Don John

Thursday, December 19, 2019

Hree Most Pressing Issues in Organizational Behavior

Three most pressing issues in Organizational Behavior and the practices that might be implemented Organization behavior is the study of behaviors and attitudes of people in an organization. After all human behaviors and attitudes determine effectiveness of any organization. The approach used in studying OB is the system approach. In other words, this approach interprets people-organization relationships in terms of the whole person, whole group, whole organization, and whole social system. Its purpose is to build better relationships by achieving human objectives, organizational objectives, and social objectives. In this paper we propose to study leadership, motivation and organizational conflict, as among the most pressing issues in†¦show more content†¦Lauded are psychologically oriented attempts to make work place participation more attractive†(Schachter, p.12). Taylor set forth his theory in two books (1903 and 1911) and a large number of articles. Many of his applications, according to John B. Miner (2001) have not met the test of time. One that has survived involves breaking down of movements into their component parts and prescribing methods for their execution. It has prospered today in the form of what is known as ‘Industrial Engineering’. â€Å"Although time and motion study can be traced to well before Taylor, he and those who worked with him perfected the approach and sold it to the world (Reeves, Duncan and Ginter 2001)† (Miner 127). Taylor’s thoughts were rooted in an industrial era characterized by mass production that relied on an assembly-line approach to manufacturing. In such a system of mass production, efficiency was gained through specialization where each worker focused on a single task (Chance and Chance, p.5) Mc Gregor’s model is quite relevant in business approach today. However, it is doubtful if the model can be successfully used to tap creativity among the work force. â€Å"†¦corporate leaders emerging from today’s business schools have been encouraged to value McGregor’s theory Y management approach – employees want and need to excel and in the right organizational climate will do so. But despite theory Y, hierarchical, paternalistic attitudes still permeate many businesses of every sizeShow MoreRelatedThe Five Dysfunctions of a Team a Leadership Fable46009 Words   |  185 PagesReaders should be aware that Internet Web sites offered as citations and/or sources for further information may have changed or disappeared between the time this was written and when it is read. Jossey-Bass books and products are available through most bookstores. To contact Jossey-Bass directly call our Customer Care Department within the U.S. at 800-956-7739, outside the U.S. at 317-572-3986, or fax 317-572-4002. Jossey-Bass also publishes its books in a variety of electronic formats. Some content