Mahatma Gandhi Research Paper Example

Mahatma Gandhi Paper Essay on Mohandas Karamchand Gandhi Mohandas Karamchand Gandhi commonly known as Mahatma Gandhi or Bapu (Father of Nation), was the preeminent leader of Indian nationalism in British-ruled India. Employing non-violent civil disobedience, Gandhi led India to independence and inspired movements for non-violence, civil rights, and freedom across the The son of a senior government official, Gandhi was born and raised in a Bania[4] community In coastal Gujarat, and trained In law In London. Gandhi became famous by fighting for the clvll rights of Muslim and Hindu Indians In South Africa, using new techniques of non-violent clvll disobedience that he developed. Returning to India In 191 5, he set about organlslng peasants to protest excessive land-taxes. A lifelong opponent of â€Å"communalism† (I. e. basing polltlcs on rellglon) he reached out widely to all rellglous groups. He became a leader of Muslims protesting the declining status of the Caliphate. Assuming leadership of the Indian National Congress in 1921, Gandhi led nationwide campaigns for easing poverty, expanding women’s rights, building religious and ethnic amity, ndinguntouchability, increasing economic self-reliance, and above all for achieving Swaraj †the independence of India from British domination. Gandhi led Indians in protesting the national salt tax with the 400 km (250 mi) Dandi Salt March in 1 930, and later in demanding the British to immediately Quit India in 1942, during World War II. We will write a custom essay sample on Mahatma Gandhi specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Mahatma Gandhi specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Mahatma Gandhi specifically for you FOR ONLY $16.38 $13.9/page Hire Writer He was imprisoned for that and for numerous other political offences over the years. Gandhi sought to practice non-violence and truth in all situations, and advocated that others do the same. He saw the villages as the core of the true India and promoted self-sufficiency; he did not support the industrialisation programs of his discipleJawaharlal Nehru. He lived modestly in a self-sufficient residential community and wore the traditional Indian dhoti and shawl, woven with yarn he had hand spun on a charkha. His chief political enemy in Britain was Winston who ridiculed him as a â€Å"half-naked fakir†. 6] He was a dedicated vegetarian, and undertook long fasts as means of both self-purification and political mobilisation. In his last year, unhappy at the partition of India, Gandhi worked to stop the carnage between Muslims, Hindus and Sikhs that raged in the border area between India and Pakistan. He was assassinated on 30 January 1948 by Nathuram Godse who thought Gandhi was too sympathetic to India’s Muslims. 30 January Is observed as Martyrs’ Day in India. The honorific Mahatma (â€Å"Great Soul†) was applied to him by 1914. [7] In India he was also called Bapu (â€Å"Father†). He Is known In India as the Father of the his birthday, 2 October, Is commemorated there s Gandhi Jayantl, a national holiday, and world-wide as the International Day of Non- Violence. Gandhi’s philosophy was not theoretical but one of pragmatism, that Is, practlslng his principles In the moment. Asked to give a message to the people, he would respond, â€Å"My life is my message BY vjshalRaJ1 freedom across the world. The son of a senior government official, Gandhi was born and raised in a Bania[4] community in coastal Gujarat, and trained in law in London. Gandhi became famous by fghting for the civil rights of Muslim and Hindu Indians in South Africa, using new techniques of non-violent civil disobedience that he developed. Returning to India in 1915, he set about organising peasants to protest excessive land-taxes. A lifelong opponent of â€Å"communalism† (i. e. basing politics on religion) he reached out widely to all religious groups. He became a leader of achieving SwaraJ †the independence of India from British domination. Gandhi led March in 1930, and later in demanding the British to immediately Quit India in 1942, Churchill,[5] who ridiculed him as a â€Å"half-naked fakir†. ] He was a dedicated Godse who thought Gandhi was too sympathetic to India’s Muslims. 30 January is to him by 1914. [7] In India he was also called Bapu (â€Å"Father†). He is known in India as the Father of the Nation;[8] his birthday, 2 October, is commemorated there as Gandhi Jayanti, a national holiday, and world-wide as the International Day of Non- Violence.

Boeing 717 Airplane †Double Narrative Creative Writing Story

Boeing 717 Airplane – Double Narrative Creative Writing Story Free Online Research Papers Boeing 717 Airplane Double Narrative Creative Writing Story An airplane (Boeing 717) that loosing every single connection with the ground control, avoided from being crashed into another plane (Boeing 777) in a half of a second. 717s account: Come in Boeing 717, come i†¦.. that was the last words that Eric Kingston, the pilot of this new Boeing 717 heard from the ground control center, before he realized that the communication line is dead, and also his radar. This, and the fact that it was a very cloudy, and dark night, made him completely unaware of his environment- he was totally blind. What happened? asked a panicked voice. It was Cris- his secondary pilot. I don’t know, it seems like we lost the connection to the ground control, and our radar is dead too. He paused but I don’t think we are in problem, the guys down there are good, Im sure they will fix it in no-time he said to calm Cris down, but it did not seem to effect. We are going to die, arent we? asked Cris quietly. No we are not! Relax; everything is going to be okay. After all, Kingston is 55 years old and he is a pilot for nearly 35 years. But Cris was only 21 years old and it was his first flight. He remembered how he didnt want to take Cris with him he is too young Bill! Im not taking him! What am I, a babysitter? he said only two hours ago to Bill Collins- his superior. Relax Eric, he wont do anything to you, but he needs the practice. Kingston knew that he cant argue with him- only because they were friends Collins informed it to him, otherwise, he wouldnt even tell him this until the flight itself. Okay, Ill take him- but if I wont like something that he may do, Im throwing him off. I knew you will agree, I think you will like the kid said Collins with a smile. Like I had a choice, Kingston thought sadly. A sudden roar brought him back from his thoughts. What happened? yelped Cris. Probably one of the passengers got sick, relax. He said. But he himself couldnt. Something happened, he thought. He tried to contact with the ground. Nothing. He tried some more buttons. Still nothing. Then he saw it- a huge silver metal object was approaching toward him very fast, very very fast. He saw it like in a dream, everything suddenly become very slow and clear. A flash of light- he saw his wife and daughter in front of him, another flash- he saw his first flight, another- his wedding, another- his last birthday- he saw all of his life flashes before his eyes. Then, like a warm up of an engine, there was a huge explosion, he heard someone scream, he felt his head knocking into something hard and then it all went dark. What happened? these were the first two words that came out of Kingstons mouth when he woke up 15 seconds afterwards. He felt like he was run over by a car, and was shivering in his seat. It cant be death- he thought. Then he understood. Apparently, Cris grabbed the wheels in the last second and save his, Kingstons and another 100 passengers lives. But the plane was still out of control, and was flipping in the air like a peace of paper in a tornado. Kingston was able to return the plane to his normal position, and all he was able to hear before he said thank you to his secondary pilot and passed out again, was a great applause behind the door. 777s account: Come in Boeing 717, come in†¦. No answer. Come in Boeing 717, come in†¦. Still no answer You are approaching in our course too fast Boeing 717, change course. I repeat- change course Silent. What in the name of god are they doing? asked in astonishment Arthur Present- the main pilot of Boeing 777. I don’t know sir, it looks like they are not going to change their course soon replied his assistant. It was true- the 717 was flying straight toward them. Maybe it’s a problem with our radar sir. Maybe Should I change our course? he asked. No, I have direct orders about the course, stay on it. Yes sir It was indeed very cloudy and dark night, and neither the pilot, nor his assistant suspected that the 717 is completely blind, and it is not going to change its course soon enough. The last few seconds were vital- it was only then when they realized that the 717 was not going to change course at time. They saw the plane in front of them too late to react. The crash was unstoppable. Then the 717 turned sharply, but not sharply enough to avoid some scratches. Or more- before anyone of them was able to understand how lucky they were that the 717s pilot has good instincts, Present began to loose control. We have a fuel leak! shouted the assistant Hold tight! This is going to be very nasty! shouted Arthur through the roars of the back engines. They flipped in the air, as they were starting to dive into the sea- an infinite body of black, scary and unknown water. To imagine the sound of metal that has 500 passengers, weights about 300,000 kg, has 170,000 liters of fuel and 60 meters of wing span, hitting the ocean from 35,000 feet in a speed of 970 k/ph + the gravity force, you need to be there- but almost nobody that was there survived. Neither did them. Research Papers on Boeing 717 Airplane - Double Narrative Creative Writing StoryNever Been Kicked Out of a Place This NiceThe Hockey GameMind TravelThe Spring and AutumnHarry Potter and the Deathly Hallows EssayThe Masque of the Red Death Room meaningsHonest Iagos Truth through DeceptionBringing Democracy to AfricaPersonal Experience with Teen PregnancyHip-Hop is Art

The 5 Canons of Classical Rhetoric

The 5 Canons of Classical Rhetoric The classical Canons of Rhetoric specify the components of the communication act: inventing and arranging ideas, choosing and delivering clusters of words, and maintaining in memory a storehouse of ideas and repertoire of behaviors. . .  This breakdown is not as facile as it looks. The Canons have stood the test of time. They represent a legitimate taxonomy of processes. Instructors [in our own time] can situate their pedagogical strategies in each of the Canons.(Gerald M. Phillips et al., Communication Incompetencies: A Theory of Training Oral Performance Behavior. Southern Illinois University Press, 1991) As defined by the Roman philosopher Cicero and the unknown author of Rhetorica ad Herennium, the canons of rhetoric are these five overlapping divisions of the rhetorical process: Invention  (Latin, inventio; Greek, heuresis)Invention is the art of finding the appropriate arguments in any rhetorical situation. In his early treatise De Inventione (c. 84 B.C.), Cicero defined invention as the discovery of valid or seemingly valid arguments to render ones cause probable. In contemporary rhetoric, invention generally refers to a wide variety of research methods and discovery strategies. But to be effective, as Aristotle demonstrated 2,500 years ago, invention must also take into consideration the needs, interests, and background of the audience.Arrangement  (Latin, dispositio; Greek, taxis)Arrangement refers to the parts of a speech or, more broadly, the structure of a text. In classical rhetoric, students were taught the distinctive parts of an oration. Although scholars didnt always agree on the number of parts, Cicero and Quintilian identified these six: the exordium (or introduction), the narrative, the partition (or division), the confirmation, the refuta tion, and the peroration (or conclusion). In current-traditional rhetoric, arrangement has often been reduced to the three-part structure (introduction, body, conclusion) embodied by the five-paragraph theme. Style  (Latin, elocutio; Greek, lexis)Style is the way in which something is spoken, written, or performed. Narrowly interpreted, style refers to word choice, sentence structures, and figures of speech. More broadly, style is considered a manifestation of the person speaking or writing. Quintilian identified three levels of style, each suited to one of the three primary functions of rhetoric: the plain style for instructing an audience, the middle style for moving an audience, and the grand style for pleasing an audience.Memory  (Latin, memoria; Greek, mneme)This canon includes all the methods and devices (including figures of speech) that can be used to aid and improve the memory. Roman rhetoricians made a distinction between natural memory (an innate ability) and artificial memory (particular techniques that enhanced natural abilities). Though often disregarded by composition specialists today, memory was a crucial aspect of classical systems of rhetoric. As Frances A. Yates po ints out in The Art of Memory (1966), Memory is not a section of [Platos] treatise, as one part of the art of rhetoric; memory in the platonic sense is the groundwork of the whole. Delivery  (Latin, pronuntiato and actio; Greek, hypocrisis)Delivery refers to the management of voice and gestures in oral discourse. Delivery, Cicero said in De Oratore, has the sole and supreme power in oratory; without it, a speaker of the highest mental capacity can be held in no esteem; while one of moderate abilities, with this qualification, may surpass even those of the highest talent. In written discourse today, says Robert J. Connors, delivery means only one thing: the format and conventions of the final written product as it reaches the hands of the reader (Actio: A Rhetoric of Written Delivery in Rhetorical Memory and Delivery, 1993).   Keep in mind that the five traditional canons are interrelated activities, not rigid formulas, rules, or categories. Though originally intended as aids to the composition and delivery of formal speeches, the canons are adaptable to many communicative situations, both in speech and in writing.

HDev 360 Essay Example | Topics and Well Written Essays - 750 words

HDev 360 - Essay Example This is a futile hope. Every fact of the processes of association will not enlighten us of the reason any specific association is constructed by a certain person, will not elucidate the roots of exogamy, the creation of bow and arrow, or of any other cultural attribute with the exception of concepts that are mutually relevant to all (Kroeber et al. 1952). The purported culture of a population, as it is commonly viewed by social scientists, is fundamentally an organized register of all the culturally inherited behavioral patterns which could be manifested in the real behavior of most or all of the members of the group (Naylor 1996). Nevertheless, the actual locus of these mechanisms which, when transformed into an entirety, represent culture is not in a conceptual group of people referred to as ‘society’, because the concept ‘society’ is also a cultural creation which is used by people who exist in important relations to each other so as to aid them in the understanding of particular features of their behavior (Naylor 1996). The actual strength of culture is in the relationships and interactions of certain people and, on the individual level, in the dimension of meanings which each of these people could instinctively adopt for him/herself from his involvement in these relationships and interactions. Immigrant women in Toronto, like Susan, are supposed to improve the lives of their families in Ghana. There is little or no problem when Susan was not yet married and migrated on her own. The difficulty arises with marriage and the harmonizing that emerges between the traditions and needs of her marital family and those of the broader extended families (Walters & Avotri 1999). This phenomenon is referred to as ‘cultural tension’. Researchers, such as Sara Berry, have introduced the persistent importance of kin associations in Africa, explaining how what has usually been thought as useless

Economics Assignment Example | Topics and Well Written Essays - 1250 words

Economics - Assignment Example When firms spend less money on expansion, they are infusing fewer funds into the economy which leads to slow economic growth. Stock market crash causes job losses and this highly impacts the economy. During recession firms tend to cut operation costs by firing workers. With less money to spend consumers will not afford durable and luxury items. Hence, unemployment in the long run negatively impact the consumer durable and real estate sectors of economy since it lead to fall in prices in commercial and real estate sectors. Additionally, when investor’s money is lost as result of stock market crash, they tend to spend less. This in essence leads to low consumer spending which negatively affects the economy. Immediately following the attack on the US on 11 Sept 2001, the stock markets plunged and many observers expected a recession in the US (and possibly elsewhere). Using the AD-AS model, explain their prediction. There are reasons that led many observers to predict a recession in the US when the stock markets plunged. Stocks are pieces of ownership in a firm and thus the stock markets are indicator of shareholders’ confidence in the future earnings of these firms. Corporate earnings depend on the stability of country’s economic standing and therefore stock markets reflect how a country is economically stable. Their crash reflects a loss of confidence in the economy and if not restored it leads to recession. This due to the fact that the stock markets crash lead to a fall in aggregate demand (AD) (demand side shock) as a result of less wealth for consumers. In addition, it implies less financing for new projects, since trading of stocks is one way that firms raise funds required to expand. They also predicted a recession in US economy because declining stock markets can kick-start a rise in oil prices which would increase the cost of manufacturing and this in

Classroom Management Essay Example for Free

Classroom Management Essay You are the teacher of a 5th grade class. Two students finished their assignment early, one student arrived late, and one student is not attempting the assignment. Being able to have the skills to handle situations like this takes practice and experience. The skills that are required are the ones that complete Jacob Kounin’s Classroom Management Model, â€Å"Lesson Movement. † Kounin’s theory on classroom management was the first to integrate instructional and disciplinary aspects of the classroom. The basis of the model is for teachers to be organized, prepared, and use proactive behavioral management combined with high student involvement with the goal of leading to a more effective classroom while minimizing disruptive behavior. Kounin coins his theory as Lesson Movement, comprised of techniques called: withitness, overlapping, momentum, smoothness, and group focus (â€Å"Classroom Management Theorist and Theories/Jacob Kounin,† 2009). Withitness is the ability of a teacher to know everything that is going on in his/her classroom at all times to prevent discipline problems before they occurred. However, as important as it is for teachers to achieve this skill, it is just as important for students to believe they their teacher is â€Å"withit. † Students will still act disruptively if they feel the teacher does not notice them. Some ways that teachers can display this technique are: consistently suppress misbehaviors of exactly those students who began the problem; dealing with the more serious of two discipline problems occurring simultaneously; and decisively handling off-task behavior before it gets out of hand or imitated by other students(â€Å"Whom are We Talking About: Jacob Kounin,† 2008). Similar to withitness, overlapping involves the ability to attend to multiple classroom events at one time, and avoiding fixating on one event at the expense of all other classroom activities. For example, if a teacher is conducting small group assignments, and a pair is off task, a teacher may address them from a distance while still conducting the activity. (â€Å"The Kounin Model,† 2008). Momentum is keeping the lesson moving briskly, requiring the teacher to plan effectively to avoid slow downs. Kounin believes that teachers should not lecture for a long period of time to allow students to gain knowledge by moving around and maximizing their allotted time. By minimizing delays and interruptions, causes students will not lose interest and misbehave. (Charles, 1989). In conjunction with momentum is smoothness. While lecturing, a teacher must maintain direction and not drift off on tangents, be diverted with irrelevant questions and information or fall victim to â€Å"flip flops,† â€Å"dangles,† or â€Å"truncation. †Otherwise, students will be confused and act out from loss of interest. (â€Å"Classroom Management Theorist and Theories/Jacob Kounin,† 2009) Lastly, Kounin refers to group focus as the ability to engage the whole class. Some techniques he offers are: building suspense or ask community questions Though community questions may appear random, it draws the group’s attention and intrigue. The teacher must incorporate procedures to handle multiple situations at once to maintain group focus. For example, if a student completes an assignment early, he/she must have a back up plan such as providing another assignment or enrichment activity while he/she helps other students that are struggling (â€Å"Classroom Management Theorist and Theories/Jacob Kounin,† 2009). Kounin’s Model of Classroom Management is an important topic for teacher’s today, because it is one of the most difficult skills to acquire. Student-centered classrooms and discovery lessons are becoming much more popular in our classrooms, leading to a more active learning environment. Being able to handle multiple situations at once, keeping students engaged, maintaining momentum and smoothness in your lessons and transitions takes experience. These are the most difficult techniques for a first year teacher to learn; therefore, making them a habit during that year will allow for mastery of these skills to occur. I believe that Kounin’s Model is important to develop an effective classroom environment; however, discipline problems will occur, no matter the amount of preventive planning a teacher makes. Kounin does not address his procedures for disciplining, if he would or would not discipline children differently, nor does he address misbehaving as a response to some factor that is outside of the teacher’s control. As a teacher, I would incorporate Kounin’s theory in my teaching planning and practices, though remembering that each student may require different accommodations. References Charles, C. M. (1989) Building Classroom discipline: from models to practice. New York City, New York: Longmans Inc.. Teacher Matters, (2008). The Kounin Model. Retrieved May 31, 2009 Teacher Matters http://www. teachermatters. com/index. php? option=com_contentview=articleid=9:kounin-modelcatid=4:models-of-disciplineItemid=4 WikiBooks, Wikimedia Foundation, Inc. (2009). Overview/History of Jacob Kounin’s Work. Retrieved May 28, 2009, from http://en. wikibooks. org/wiki/Classroom_Management_Theorist_and_Theories/Jacob_Kounin WikiEd. (2008). Whom are we talking about: Jacob Kounin. Retrieved June 8, 2009 from http://wik. ed. uiuc. edu/index. php/Kounin,_Jacob.

Freud’s Psychoanalytic Theory Essay -- Sigmund Freud

Freud’s Psychoanalytic Theory I.  Ã‚  Ã‚  Ã‚  Ã‚  Overview of Freud’s Psychoanalytic Theory   Ã‚  Ã‚  Ã‚  Ã‚  Freud’s psychoanalysis is the best known of all personality theories because it (1) postulated the primacy of sex and aggression—two universally popular themes; (2) attracted a group of followers who were dedicated to spreading psychoanalytic doctrine; and (3) advanced the notion of unconscious motives, which permit varying explanations for the same observations. II.  Ã‚  Ã‚  Ã‚  Ã‚  Biography of Sigmund Freud   Ã‚  Ã‚  Ã‚  Ã‚  Although he was born in the Czech Republic in 1856 and died in London in 1939, Sigmund Freud spent nearly 80 years of his life in Vienna. A physician who never intended to practice general medicine, Freud was intensely curious about human nature, and in his practice of psychiatry he was perhaps more interested in learning about the unconscious motives of his patients than in curing neuroses. Early in his professional career, Freud believed that hysteria was a result of being seduced during childhood by a sexually mature person, often a parent or other relative. However, in 1897, he abandoned his seduction theory and replaced it with his notion of the Oedipus complex. Some recent scholars have contended that Freud’s decision to abandon the seduction theory in favor of the Oedipus complex was a major error and influenced a generation of psychotherapists to interpret patients’ reports of early sexual abuse as merely childhood fantasies. III.  Ã‚  Ã‚  Ã‚  Ã‚  Levels of Mental Life   Ã‚  Ã‚  Ã‚  Ã‚  Freud saw mental functioning as operating on three levels: the unconscious, the preconscious, and the conscious.   Ã‚  Ã‚  Ã‚  Ã‚  A.   Ã‚  Ã‚  Ã‚  Ã‚  Unconscious   Ã‚  Ã‚  Ã‚  Ã‚  The unconscious consists of drives and instincts that are beyond awareness but that motivate many of our behaviors. Unconscious drives can become conscious only in disguised or distorted form, such as dream images, slips of the tongue, or neurotic symptoms. Unconscious processes originate from two sources: (1) repression, or the blocking out of anxiety-filled experiences and (2) phylogenetic endowment, or inherited experiences that lie beyond an individual’s personal experience.   Ã‚  Ã‚  Ã‚  Ã‚  B.   Ã‚  Ã‚  Ã‚  Ã‚  Preconscious   Ã‚  Ã‚  Ã‚  Ã‚  The preconscious contains images that are not in awareness but that can become conscious either quite easily or with some level of difficulty.   Ã‚  Ã‚  Ã‚  Ã‚  C.   Ã‚  Ã‚  Ã‚  Ã‚  Conscious   Ã‚  Ã‚  Ã‚  Ã‚  Consciousness is the only level of mental life directly available to us... ...pecially in women. Other research found that people who are orally fixated tend to see their parents more negatively than do people who are less orally fixated. X.  Ã‚  Ã‚  Ã‚  Ã‚  Critique of Freud   Ã‚  Ã‚  Ã‚  Ã‚  Freud regarded himself as a scientist, but many present-day critics consider his methods to be outdated, unscientific, and permeated with sexual bias. On the six criteria of a useful theory, we rated psychoanalysis high on its ability to generate research, very low on its falsifiability, and average on organizing knowledge, guiding action, and being parsimonious. Because it lacks operational definitions, we rated psychoanalysis low on internal consistency. XI.  Ã‚  Ã‚  Ã‚  Ã‚  Concept of Humanity   Ã‚  Ã‚  Ã‚  Ã‚  Freud’s view of humanity was deterministic and pessimistic. He also emphasized causality over teleology, unconscious determinants over conscious processes, and biology over culture, but he took a middle position on the dimension of uniqueness versus similarities among people. BIBLIOGRAPHY PsychCrawler (American Psychological Association)Online. Psychological Online Documents (Psychologisches Institut der Univ. Bonn)Online. PSYCline Links to Psychological Journals (Armin Gà ¼nther)Online.

Introduction to Management Science Essay

We are very excited to publish the revised thirteenth edition of a text that has been a leader in the ï ¬ eld for over 20 years. The purpose of this revised thirteenth edition, as with previous editions, is to provide undergraduate and graduate students with a sound conceptual understanding of the role that  management science plays in the decision-making process. The text describes many of the applications where management science is used successfully. Former users of this text have told us that the applications we describe have led them to ï ¬ nd new ways to use management science in their organizations. An Introduction to Management Science is applications oriented and continues to use the problem-scenario approach that is a hallmark of every edition of the text. Using the problem-scenario approach, we describe a problem in conjunction with the management science model being introduced. The model is then solved to generate a solution and recommendation to management. We have found that this approach helps to motivate the student by not only demonstrating how the procedure works, but also how it contributes to the decision-making process. From the very ï ¬ rst edition we have been committed to the challenge of writing a textbook that would help make the mathematical and technical concepts of management science understandable and useful to students of business and economics. Judging from the responses from our teaching colleagues and thousands of students, we have successfully met the challenge. Indeed, it is the helpful comments and suggestions of many loyal users that have been a major reason why the text is so successful. Throughout the text we have utilized generally accepted notation for the topic being covered so those students who pursue study beyond the level of this text should be comfortable reading more advanced material. To assist in further study, a references and bibliography section is included at the back of the book. CHANGES IN THE REVISED THIRTEENTH EDITION The thirteenth edition of Management Science is a major revision. We are very excited about it and want to tell you about some of the changes we have made and why. In addition to the major revisions described in the remainder of this section, this revised edition of the thirteenth edition has been updated to incorporate Microsoft ® Ofï ¬ ce Excel ® 2010. This involves some changes in the user interface of Excel and major changes in the interface and functionality of Excel Solver. The Solver in Excel 2010 is more reliable than in previous editions and offers new alternatives such as a multistart option for difï ¬ cult nonlinear problems. New Member of the ASWM Team Prior to getting into the content changes, we want to announce that we are adding a new member to the ASWM author team. His name is Jeffrey Camm. Jeff received his Ph.D. from Clemson University. He has been at the University of Cincinnati since 1984, and has been a visiting scholar at Stanford University and a visiting professor of business administration at the Tuck School of Business at Dartmouth College. Jeff has published over 30 papers in the general area of optimization applied to problems in operations management. At the University of Cincinnati, he was named the Dornoff Fellow of Teaching Excellence and xxvi Preface he was the 2006 recipient of the INFORMS Prize for the Teaching of Operations Research Practice. He currently serves as editor-in-chief of Interfaces, and is on the editorial board of INFORMS Transactions on Education. We welcome Jeff to the new ASWCM team and expect the new ideas from Jeff will make the text even better in the years to come. In preparing this thirteenth edition, we have been careful to maintain the overall format and approach of the previous edition. However, based on our classroom experiences and suggestions from users of previous editions, a number of changes have been made to enhance the text. Made the Book Less Reliant on Speciï ¬ c Software The ï ¬ rst eight chapters on optimization no longer use output from The Management Scientist software. All ï ¬ gures illustrating computer output are generic and are totally independent of software selection. This provides ï ¬â€šexibility for the instructor. In addition, we provide appendices that describe how to use Excel Solver and LINGO. For every model illustrated in the text we have both Excel and LINGO ï ¬ les available at the website. Prior users of The Management Scientist wishing to upgrade to similar software should consider using LINGO. This will be an easy transition and LINGO is far more ï ¬â€šexible than The Management Scientist. The documented LINGO models  (not available in MS 12e), available at the website, will aide in the transition. Excel Solver and LINGO have an advantage over The Management Scientist in that they do not require the user to move all variables to the left-hand side of the constraint. This eliminates the need to algebraically manipulate the model and allows the student to enter the model in the computer in its more natural form. For users wishing to use The Management Scientist, it will continue to be available on the website for the text. New Appendix A: Building Spreadsheet Models This appendix will prove useful to professors and students wishing to solve optimization models with Excel Solver. The appendix also contains a section on the principles of good spreadsheet modeling and a section on auditing tips. Exercises are also provided. Chapter 15 Thoroughly Revised Chapter 15, Times Series Analysis and Forecasting, has been thoroughly revised. The revised chapter is more focused on time series data and methods. A new section on forecast accuracy has been added and there is more emphasis on curve ï ¬ tting. A new section on nonlinear trend has been added. In order to better integrate this chapter with the text, we show how ï ¬ nding the best parameter values in forecasting models is an application of optimization, and illustrate with Excel Solver and LINGO. New Project Management Software In Chapter 9, Project Scheduling: PERT/CPM, we added an appendix on Microsoft Ofï ¬ ce Project. This popular software is a valuable aid for project management and is software that the student may well encounter on the job. This software is available on the CD that is packaged with every new copy of the text. Chapter 3 Signiï ¬ cantly Revised We signiï ¬ cantly revised Chapter 3, Linear Programming: Sensitivity Analysis and Interpretation of Solution. The material is now presented in a more up-to-date fashion and emphasizes the ease of using software to analyze optimization models. Preface xxvii New Management Science in Action, Cases, and Problems Management Science in Action is the name of the short summaries that describe how the material covered in a chapter has been used in practice. In this edition you will ï ¬ nd numerous Management Science in Action vignettes, cases, and homework problems. Other Content Changes A variety of other changes, too numerous to mention individually, have been made throughout the text in responses to suggestions of users and our students. COMPUTER SOFTWARE INTEGRATION We have been careful to write the text so that it is not dependent on any particular software package. But, we have included materials that facilitate using our text with several of the more popular software packages. The following software and ï ¬ les are available on the website for the text: †¢ †¢ †¢ †¢ LINGO trial version, LINGO and Excel Solver models for every optimization model presented in the text, Microsoft ® Excel worksheets for most of the examples used throughout the text, TreePlanTM Excel add-in for decision analysis and manual. Microsoft Project is provided on the CD that is packaged with every new copy of the text. FEATURES AND PEDAGOGY We have continued many of the features that appeared in previous editions. Some of the important ones are noted here. Annotations Annotations that highlight key points and provide additional insights for the student are a continuing feature of this edition. These annotations, which appear in the margins, are designed to provide emphasis and enhance understanding of the terms and concepts being presented in the text. Notes and Comments At the end of many sections, we provide Notes and Comments designed to give the student additional insights about the statistical methodology and its application. Notes and Comments include warnings about or limitations of the methodology, recommendations for application, brief descriptions of additional technical considerations, and other matters. Self-Test Exercises Certain exercises are identiï ¬ ed as self-test exercises. Completely worked-out solutions for those exercises are provided in an appendix at the end of the text. Students can attempt the self-test exercises and immediately check the solution to evaluate their understanding of the concepts presented in the chapter. xxviii Preface ACKNOWLEDGMENTS We owe a debt to many of our academic colleagues and friends for their helpful comments and suggestions during the development of this and previous editions. Our associates from organizations who supplied several of the Management Science in Action vignettes make a major contribution to the text. These individuals are cited in a credit line associated with each vignette. We are also indebted to our senior acquisitions editor, Charles McCormick, Jr.; our marketing communications manager, Libby Shipp; our developmental editor, Maggie Kubale; our content project manager, Jacquelyn K Featherly; our media editor, Chris Valentine; and others at Cengage Business and Economics for their counsel and support during the preparation of this text. We also wish to thank Lynn Lustberg, Project Manager at MPS Content Services for her help in manuscript preparation. David R. Anderson Dennis J. Sweeney Thomas A. Williams Jeffrey D. Camm Kipp Martin About the Authors David R. Anderson. David R. Anderson is Professor Emeritus of Quantitative Analysis in the College of Business Administration at the University of Cincinnati. Born in Grand Forks, North Dakota, he earned his B.S., M.S., and Ph.D. degrees from Purdue University. Professor Anderson has served as Head of the Department of Quantitative Analysis and Operations Management and as Associate Dean of the College of Business Administration. In addition, he was the coordinator of the College’s ï ¬ rst Executive Program. At the University of Cincinnati, Professor Anderson has taught introductory statistics for business students as well as graduate-level courses in regression analysis, multivariate analysis, and management science. He has also taught statistical courses at the Department of Labor in Washington, D.C. He has been honored with nominations and awards for excellence in teaching and excellence in service to student organizations. Professor Anderson has coauthored ten textbooks in the areas of statistics, management science, linear programming, and production and operations management. He is an active consultant in the ï ¬ eld of sampling and statistical methods. Dennis J. Sweeney. Dennis J. Sweeney is Professor Emeritus of Quantitative Analysis and Founder of the Center for Productivity Improvement at the University of Cincinnati. Born in Des Moines, Iowa, he earned a B.S.B.A. degree from Drake University and his M.B.A. and D.B.A. degrees from Indiana University, where he was an NDEA Fellow. During 1978–79, Professor Sweeney worked in the management science group at Procter & Gamble; during 1981–82, he was a visiting professor at Duke University. Professor Sweeney served as Head of the Department of Quantitative Analysis and as Associate Dean of the College of Business Administration at the University of Cincinnati. Professor Sweeney has published more than thirty articles and monographs in the area of management science and statistics. The National Science Foundation, IBM, Procter & Gamble, Federated Department Stores, Kroger, and Cincinnati Gas & Electric have funded his research, which has been published in Management Science, Operations Resea rch, Mathematical Programming, Decision Sciences, and other journals. Professor Sweeney has coauthored ten textbooks in the  areas of statistics, management science, linear programming, and production and operations management. Thomas A. Williams. Thomas A. Williams is Professor Emeritus of Management Science in the College of Business at Rochester Institute of Technology. Born in Elmira, New York, he earned his B.S. degree at Clarkson University. He did his graduate work at Rensselaer Polytechnic Institute, where he received his M.S. and Ph.D. degrees. Before joining the College of Business at RIT, Professor Williams served for seven years as a faculty member in the College of Business Administration at the University of Cincinnati, where he developed the undergraduate program in information systems and then served as its coordinator. At RIT he was the ï ¬ rst chairman of the Decision Sciences Department. He teaches courses in management science and statistics, as well as graduate courses in regression and decision analysis. xxx About the Authors Professor Williams is the coauthor of eleven textbooks in the areas of management science, statistics, production and operations management, and mathematics. He has been a consultant for numerous Fortune 500 companies and has worked on projects ranging from the use of data analysis to the development of large-scale regression models. Jeffrey D. Camm. Jeffrey D. Camm is Professor of Quantitative Analysis and Head of the Department of Quantitative Analysis and Operations Management at the University of Cincinnati. Dr. Camm earned a Ph.D. in management science from Clemson University and a B.S. in mathematics from Xavier University. He has been at the University of Cincinnati since 1984, has been a visiting scholar at Stanford University, and a visiting professor of business administration at the Tuck School of Business at Dartmouth College. Dr. Camm has published over 30 papers in the general area of optimization applied to problems in operations management and his research has been fu nded by the Air Force Ofï ¬ ce of Scientiï ¬ c Research, the Ofï ¬ ce of Naval Research, and the U.S. Department of Energy. He was named the Dornoff Fellow of Teaching Excellence by the University of Cincinnati College of Business and he was the 2006  recipient of the INFORMS Prize for the Teaching of Operations Research Practice. He currently serves as editor-in-chief of Interfaces, and is on the editorial board of INFORMS Transactions on Education. Kipp Martin. Kipp Martin is Professor of Operations Research and Computing Technology at the Booth School of Business, University of Chicago. Born in St. Bernard, Ohio, he earned a B.A. in mathematics, an MBA, and a Ph.D. in management science from the University of Cincinnati. While at the University of Chicago, Professor Martin has taught courses in management science, operations management, business mathematics, and information systems. Research interests include incorporating Web technologies such as XML, XSLT, XQuery, and Web Services into the mathematical modeling process; the theory of how to construct good mixed integer linear programming models; sy mbolic optimization; polyhedral combinatorics; methods for large scale optimization; bundle pricing models; computing technology; and database theory. Professor Martin has published in INFORMS Journal of Computing, Management Science, Mathematical Programming, Operations Research, The Journal of Accounting Research, and other professional journals. He is also the author of The Essential Guide to Internet Business Technology (with Gail Honda) and Large Scale Linear and Integer Optimization. CHAPTER Introduction CONTENTS 1.1 1.2 1.3 PROBLEM SOLVING AND DECISION MAKING QUANTITATIVE ANALYSIS AND DECISION MAKING QUANTITATIVE ANALYSIS Model Development Data Preparation Model Solution Report Generation A Note Regarding Implementation 1.5 1.4 MODELS OF COST, REVENUE, AND PROFIT Cost and Volume Models Revenue and Volume Models Proï ¬ t and Volume Models Breakeven Analysis MANAGEMENT SCIENCE TECHNIQUES Methods Used Most Frequently 1

Liquid Chromatography

9. 1 Orbitals and Theories of Chemical Bonding 1. Which one of the statements concerning valence bond (VB) and molecular orbital (MO) bond theories is correct? a) MO theory predicts that electrons are localized between pairs of atoms. b) In VB theory, bonding electrons are delocalized over the molecule. c) MO theory accurately describes bonding in O2 and NO, VB theory does not. d) VB theory can describe molecular bonding in excited states. e) MO theory is used to accurately predict the colors of compounds. Answer: c 9. 2 Valence Bond Theory 2. Which of the following statements is/are CORRECT? . The overlap between an s orbital and a p orbital is called a pi-bond. 2. The overlap of two s orbitals in H2 is called a sigma bond. 3. HF is formed from the overlap of a hydrogen 1s orbital with a fluorine 2s orbital. a) 1 onlyb) 2 onlyc) 3 onlyd) 2 and 3e) 1, 2, and 3 Answer: b 3. Which of the following statements concerning hybrid orbitals is/are CORRECT? 1. The number of hybrid orbitals eq uals the number of atomic orbitals that are used to create the hybrids. 2. When atomic orbitals are hybridized, the s orbital and at least one p orbital are always hybridized. 3. To create octahedral structures, two d orbitals must be hybridized along with the s and all three p orbitals. a) 1 onlyb) 2 onlyc) 3 onlyd) 2 and 3e) 1, 2, and 3 Answer: e 4. How many sigma (? ) bonds and pi (? ) bonds are in ethene, C2H4? a) four ? , one ? b) four ? , two ? c) five ? , one ? d) five ? , two ? e) six ? , zero ? Answer: c 5. How many sigma (? ) bonds and pi (? ) bonds are in carbon monoxide? a) three ? , zero ? b) two ? , one ? c) two ? , two ? d) one ? , two ? e) zero ? , three ? Answer: d 6. How many sigma (? ) bonds and pi (? ) bonds are in the following molecule? a) seven ? nd three ? b) seven ? and two ? c) five ? and five ? d) five ? and three ? e) five ? and two ? Answer: a 7. To form a molecule with a trigonal bipyramidal electron geometry, what set of pure atomic orbitals must be mixed? a) one s and three p b) one s, three p, and one d c) one s, three p, and two d d) two s, six p, and two d e) two s, six p, and four d Answer: b 8. What is the maximum number o f hybridized orbitals formed by a fluorine atom? a) 1b) 2c) 3d) 4e) 6 Answer: d 9. What is the hybridization of either carbon atom in acetylene, C2H2? a) spb) sp2c) sp3d) sp3de) sp3d2 Answer: a 10. What is the hybridization of the nitrogen atom in NCl3? a) spb) sp2c) sp3d) sp3de) sp3d2 Answer: c 11. What is the hybridization of the xenon atom in XeF2? a) spb) sp2c) sp3d) sp3de) sp3d2 Answer: d 12. What is the hybridization of the central nitrogen atom in nitrite ion, NO2-? a) spb) sp2c) sp3d) sp3de) sp3d2 Answer: b 13. What is the hybridization of the chlorine atom in chlorite ion, ClO2-? a) spb) sp2c) sp3d) sp3de) sp3d2 Answer: c 14. What is the hybridization of the central atom in a molecule with a square-planar molecular geometry? a) spb) sp2c) sp3d) sp3de) sp3d2 Answer: e 15. What is the hybridization of each carbon atom in benzene, C6H6? Benzene contains a six-member carbon ring. a) spb) sp2c) sp3d) sp3de) sp3d2 Answer: b 16. For which of the following molecules does the central carbon atom have sp2 hybridization? a) Cl2COb) CHCl3c) CS2d) CH2Cl2e) HCN Answer: a 17. For which of the following molecules and ions does the central nitrogen atom have sp3 hybridization? a) NO2-b) HNO3c) NOBrd) NBr3e) HNO2 Answer: d 18. For which of the following molecules and ions does the central atom have sp hybridization: NO2+, O3, and I3-? a) NO2+ onlyb) O3 onlyc) I3- onlyd) O3 and I3-e) I3- and NO2+ Answer: a 9. What is the molecular geometry around a central atom that is sp3 hybridized and has two lone pairs of electrons? a) bent b) linear c) trigonal-planar d) trigonal-pyramidal e) trigonal-bipyramidal Answer: a 20. What is the molecular geometry around a central atom that is sp3d2 hybridized and has one lone pair of electrons? a) tetrahedral b) trigonal-bipyramidal c) square-planar d) square-pyramidal e) see-saw Answer: d 21. What is the molecular geometry around a central atom that is sp2 hybridized, has three sigma bonds, and one pi bond? a) trigonal-planar b) trigonal-pyramidal c) bent d) T-shaped e) tetrahedral Answer: a 2. What is the molecular geometry around a central atom that is sp3d hybridized and has one lone pair of eletrons? a) trigonal bipyramidal b) trigonal-pyramidal c) see-saw d) tetrahedral e) square-planar Answer: c 23. What is the hybridization of a central atom that has four sigma bonds and has no lone pairs of electrons? a) spb) sp2c) sp3d) sp3de) sp3d2 Answer: c 24. Upon heating, CaCO3 decomposes to CaO and CO2. What change in the hybridization of carbon occurs in this reaction? a) sp to sp2b) sp2 to sp3c) sp3 to spd) sp2 to spe) no change Answer: d 25. One product of the combustion of ethane, C2H6, is carbon dioxide. What change in hybridization of the carbon occurs in this reaction? a) sp3 to sp2b) sp3 to spc) sp2 to sp3d) sp2 to sp3d2e) sp2 to sp Answer: b 26. Nitric acid, HNO3, dissociates in water to form nitrate ions and hydronium ions. What change in hybridization of the nitrogen atom occurs in this dissociation? a) sp2 to sp3b) sp2 to spc) sp3 to spd) sp to sp3e) no change Answer: e 27. Which of the following hybridized atoms is not possible? a) an sp hybridized carbon atom b) an sp2 hybridized sulfur atom c) an sp3 hybridized phosphorus atom d) an sp3d hybridized oxygen atom e) an sp3d2 hybridized xenon atom Answer: d 8. Which of the following characteristics apply to SO2? 1. polar bonds 2. nonpolar molecule 3. linear molecular shape 4. sp hybridized a) 1 onlyb) 1 and 2c) 3 and 4d) 1, 2, and 3e) 1, 2, 3, and 4 Answer: a 29. Dichloromethane, CH2Cl2, is a common organic solvent. Which of the following statements concerning dichloromethane is/are CORRECT? 1. CH2Cl2 has two isomers. For one i somer of CH2Cl2, the chlorine atoms are adjacent to each other and the molecule is polar. 2. CH2Cl2 has two isomers. For one isomer of CH2Cl2, the chlorine atoms are on opposites sides of the carbon atom and the molecule is nonpolar. 3. The hybridization of the central carbon atom is sp3. a) 1 onlyb) 2 onlyc) 3 onlyd) 1 and 2e) 1, 2, and 3 Answer: c 30. For which of the following compounds is it possible for cis and trans isomers to exist? a) 1 onlyb) 2 onlyc) 3 only d) 1 and 2e) 1, 2, and 3 Answer: b 31. Which of the underlined atoms (C1, C2, N, and O) are sp2 hybridized? a) C1 and C2 b) C1, N, and O c) N and O d) O and C2 e) O only Answer: a 9. 3 Molecular Orbital Theory 32. All of the following statements concerning molecular orbital (MO) theory are correct EXCEPT a) the Pauli exclusion principle is obeyed. b) Hund’s rule is obeyed. ) electrons are assigned to orbitals of successively higher energy. d) a bonding molecular orbital is lower in energy than its parent atomic orbitals. e) the combination of two atomic orbitals creates only one molecular orbital. Answer: e 33. Atomic orbitals combine most effectively to form molecular orbitals when a) electrons in the orbitals have no spins. b) electrons in the orbitals have the same spin. c) the atomic orbitals are hybridized. d) the atomic orbitals have similar energies. e) p-orbitals are half-filled. Answer: d 34. A molecular orbital that decreases the electron density between two nuclei is said to be ________. ) hybridizedb) bondingc) antibondingd) pi-bondinge) nonpolar Answer: c The following molecular orbital diagram may be used for problems 35-48. For oxygen and fluorine, the ? 2p orbital should be lower in energy than the ? 2p. However, the diagram will still yield correct bond order and magnetic behavior for these molecules. |Energy | |________ |? *2p | | | | | | |________ | |________ |? 2p | | | | | | | |________ |? 2p | | | | | | |________ | |________ |? 2p | | | | | | | |________ |? 2s | | | | | | | |________ |? 2s | | | | | | | |________ |? *1s | | | | | | | |________ |? s | 35. According to molecular orbital theory, which of the following species is the most likely to exist? a) H22-b) He2c) Li22-d) Be2e) Be22- Answer: e 36. A ccording to molecular orbital theory, which of the following species is least likely to exist? a) Be2b) F22+c) C22-d) Li2e) B22- Answer: a 37. According to molecular orbital theory, which of the following species has the highest bond order? a) F2b) F22+c) C22-d) Li2e) B22+ Answer: c 38. According to molecular orbital theory, what is the bond order of oxygen, O2? a) 1b) 3/2c) 2d) 5/2e) 3 Answer: c 39. According to molecular orbital theory, what is the bond order of N2-? a) 1b) 3/2c) 2d) 5/2e) 3 Answer: d 40. According to molecular orbital theory, which of the following lists ranks the oxygen species in terms of increasing bond order? a) O22+ < O22- < O2 b) O22- < O2 < O22+ c) O2 < O22+ < O22- d) O2 < O22- < O22+ e) O22+ < O2 < O22- Answer: b 41. Consider the molecules B2, C2, N2 and O2. Which two molecules have the same bond order? a) B2 and C2b) B2 and O2c) C2 and N2d) C2 and O2e) N2 and O2 Answer: d 42. Use molecular orbital theory to predict which species is paramagnetic. ) N2b) O2c) F2d) Li2e) H2 Answer: b 43. Use molecular orbital theory to predict which ion is paramagnetic. a) F22+b) O22-c) O22+d) N22+e) B22- Answer: a 44. What is the molecular orbital configuration of F2? a) [core electrons] (? 2s)2 (? *2s)2 (? 2p)4 (? 2p)2 (? *2p)2 b) [core electrons] (? 2s)2 (? *2s)2 (? 2p)2 (? 2p)2 (? *2p)2 c) [core electrons] (? 2s)2 (? *2s)2 (? 2p)4 (? *2p)4 d) [core electrons] (? 2s)2 (? *2s)2 (? 2p)4 (? 2p)2 (? *2p)6 e) [core electrons] (? 2s)2 (? *2s)2 (? 2p)4 (? 2p)2 (? *2p)4 Answer: e 45. What is the molecular orbital configuration of N22+? a) [core electrons] (? s)2 (? *2s)2 (? 2p)4 (? 2p)2 (? *2p)2 b) [core electrons] (? 2s)2 (? *2s)2 (? 2p)4 c) [core electrons] (? 2s)2 (? *2s)2 (? 2p)2 (? 2p)2 d) [core electrons] (? 2s)4 (? *2s)4 e) [core electrons] (? 2s)2 (? *2s)2 (? 2p)4 (? 2p)2(? *2p)4 Answer: b 46. Assume that the molecular orbital energy diagram for a homonuclear diatomic molecule applies to a heteronuclear diatomic molecule. What is the molecular orbital configuration of NO? a) [core electrons] (? 2s)2 (? *2s)2 (? 2p)4 (? 2p)2 (? *2p)1 b) [core electrons] (? 2s)2 (? *2s)2 (? 2p)2 (? 2p)2 (? *2p)2 c) [core electrons] (? 2s)2 (? 2s)2 (? 2p)2 (? 2p)3 d) [core electrons] (? 2s)2 (? *2s)2 (? 2p)4 (? 2p)1 e) [core electrons] (? 2s)2 (? *2s)2 (? 2p)2 Answer: a 47. Assuming that the molecular orbital energy diagram for a homonuclear diatomic molecule appli es to a heteronuclear diatomic molecule, determine which of the following species has the highest bond order. a) NO-b) OF-c) CN-d) O2e) NO Answer: c 48. Assuming that the molecular orbital energy diagram for a homonuclear diatomic molecule applies to a heteronuclear diatomic molecule, determine which of the following species is paramagnetic. a) NO+b) COc) CN-d) OF-e) NO Answer: e 49. Which molecule will have the following valence molecular orbital level energy diagram? |? *2p | | | | |? *2p | | | | |? 2p | |[pic] | | |? 2p |[pic] | |[pic] | |? *2s | |[pic] | | |? 2s | |[pic][pic] | | a) Li2b) Be2c) B2d) C2e) N2 Answer: e 50. The following valence molecular orbital energy level diagram is appropriate for which one of the listed species? |? 2p | | | | |? *2p |[pic] | |[pic] | |? 2p | |[pic] | | |? 2p |[pic] | |[pic] | |? *2s | |[pic] | | |? 2s | |[pic][pic] | | a) B22-b) C22-c) N22-d) O22-e) F22- Answer: c 51. Which molecule will have the following valence molecular orbital energy level diagram? |? *2p | | | | |? *2p | | | | |? 2p | | | | ? 2p |[pic] | |[pic] | |? *2s | |[pic] | | |? 2s | |[pic][pic] | | a) Li2b) Be2c) B2d) C2e) F2 Answer: d 52. In the NO2- ion, each atom can be viewed as sp2 hybridized. Thus, each atom has one remaining unhybridized p orbital. How many ? 2p molecular orbitals (including both bonding and antibonding orbitals) are form ed using the unhybridized p orbitals? a) 1b) 3c) 4d) 6e) 12 Answer: b 53. Benzene, C6H6, consists of a six member ring of sp2 hybridized carbon atoms. Each carbon atom has one unhybridized p orbital. How many ? p bonding, antibonding, and nonbonding molecular orbitals exist for benzene? a) Three ? 2p molecular orbitals exist; two bonding and one antibonding. b) Three ? 2p molecular orbitals exist; one bonding, one antibonding, and one nonbonding. c) Six ? 2p molecular orbitals exist; three bonding and three antibonding. d) Six ? 2p molecular orbitals exist; two bonding, two nonbonding, and two antibonding. e) Twelve ? 2p molecular orbitals exist; six bonding and six antibonding. Answer: c Short Answer Questions 54. Which theory, valence bond or molecule orbital, correctly predicts the existence of paramagnetic molecules? Answer: molecular orbital theory 55. In valence bond theory, each sigma bond in CH4 is formed from the overlap of a hydrogen atom’s 1s orbital with a ____ hybridized orbital on the carbon atom. Answer: sp3 56. In molecular orbital theory, the bond order is defined as 1/2(the number of electrons in ________ orbitals minus the number of electrons in antibonding orbitals). Answer: bonding 57. Triiodide ion, I3-, has a trigonal-bipyramidal electron-pair geometry and a linear molecular geometry. The hybridization of the central iodine atom is ________. Answer: sp3d 58. The hybridization of the xenon atom in XeOF4 is ________. Answer: sp3d2 59. Draw a Lewis structure of xenon trioxide. What is the hybridization of the xenon atom in this molecule? Answer: The hybridization is sp3. 60. Draw the valence molecular orbital energy level diagram for nitrogen monoxide, NO. |? *2p | |[pic] | | |? *2p | | | | |? 2p | |[pic] | | |? 2p |[pic] | |[pic] | |? *2s | |[pic] | | |? 2s | |[pic][pic] | | Answer: ———————– [pic] [pic] [pic] [pic]

Use Is_String to Check if a Variable Is a String in PHP

Use Is_String to Check if a Variable Is a String in PHP The is_string() PHP function is used to check if a type of variable is a  string. A string is a data type, such as floating point or integer, but it represents text rather than numbers. A string uses a set of characters that includes spaces and numbers. For instance, an address such as 1234 Broadway and the sentence I ate 3 hotdogs contain numbers that should be treated as text, not as numbers. How to Use the Function Is_string is used within an if () statement to treat strings in one way and non-strings in another. It returns true or false. For example: ?php if (is_string(23)) {echo Yes;} else {echo No;}? The code above should output No because 23 is not a string. Lets try this again: ?php if (is_string(Hello World)) {echo Yes;} else {echo No;}? Since Hello World is a string, this would echo Yes. Specifying a String A string can be specified in four ways: Single quotedDouble quoted  Heredoc syntaxNowdoc Syntax Each of these methods requires strict adherence  to PHP rules, which are available at the PHP website. The simplest method, single-quoted strings, requires special treatment when literal single quotation marks or literal backslashes appear in the string. Include a backslash in front of the single quotation mark or backslash within the string. The example below illustrates this treatment: ?php//  Outputs:  Arnold said:  Ill  be  backecho  Arnold said:  I\ll  be  back;//  Outputs:  I  deleted  C:\*.*?echo  I  deleted  C:\\*.*?;? Similar Functions is_float() – determines if the type of variable is floatis_int() – determines if the type of variable is integeris_bool() – determines if a variable is a booleanis_object() – determines if a variable is an objectis_array() – determines if a variable is an array

War in Vietnam Essay Example | Topics and Well Written Essays - 2000 words

War in Vietnam - Essay Example The American government perceived the French defeat as a defeat of its economic ideology (Oberdorfer 2001, p. 45). The North Vietnamese rebels adhered to communism. Their win in this conflict showed that this region would assume communism. This occurred at the height of the cold war in which the Soviet Union and America were seeking to propagate their economic models. America’s refusal to admit the defeat of France in this conflict aggravated the conflict. The strategy relating to the conflict changed significantly with changes in regimes. The write-up will examine the factors, which resulted in the involvement of America in this conflict. This conflict generated massive controversy in the America owing to fatalities. This conflict lasted over two decades. This reveals that America was not ready to lose since it would signify weakness in its ability to dominate the globe politically. American was embroiled in this conflict due to several reasons. The reason varied from economi c to political reasons. However, they all culminated in the aggravation of the conflict (Kissinger 2003, p. 32). Reasons from America’s involvement in the conflict At the time of the conflict, the Soviet Union and America were locked in a cold war. The cold war entailed each nation sabotaging its enemy indirectly. The cold war erupted as the two dominant nations in the globe embarked on a campaign to increase adoption of their economic models. The American government was popularising capitalism while the Soviet Union sought to popularize communism. The economic model, which would prevail, would make its source nation an economic powerhouse. The Northern Vietnamese were supported by a communism nation (Lawrence 2008, p. 124). Therefore, American viewed this as the spread of communism. The defeat of French forces in this nation meant that Vietnam would become a communist nation. Additionally, it meant that the capitalist world represented by France had failed. America viewed it as its responsibility to ensure that the rebels do not prevail. The need to ensure that Vietnam does not become a communist nation resulted in this conflict since the French had already negotiated a pact that would ensure peace in the nation. However, the Americans felt that conceding defeat meant that capitalism had lost. Subsequently, communism would become the dominant economic model. The Soviet Union had prevailed in this region of the Asia, which was dominantly communism. Vietnam was in a strategic position in relation to the communist world. Therefore, the loss of this nation to communism policies would weaken America’s quest to spread its economic model to this part of the globe. This conflict ensured that America was able to contain the spread of communism to this part of the Vietnam (Brigham 2012). During this time, the Soviet Union and America were the world dominant nations. Each nation sought to surpass the other by becoming the dominant nation both politically a nd economically. These nations could not fight directly. Therefore, they opted for sabotaging tactics. These tactics entailed America supporting Soviet Union’s foes. Similarly, the Soviet Union would support America’s foes. This resulted in an ongoing conflict where the two nations did not take direct military action against each other. The Vietnamese conflict provided the perfect situation for the two nations to implement their tactics (Burgan 2006, p. 238). The Northern Vie

Reading reflection 3 Essay Example | Topics and Well Written Essays - 750 words

Reading reflection 3 - Essay Example I agree with the author of the essay â€Å"Images of Women† in the sense that there truly are a number of reasons as to why these traditional roles for women continue to be perpetuated and exist today. Our culture and traditions as a people, which are documented in various ways such as the bible, have created and promoted the weaker sex version of women for as long as time has existed. For the strong willed and independent woman of today who sometimes have to deal with old school beliefs and traditionalists in the workplace, that has become a real challenge to overcome. I believe that the images of women as we see it today, can be directly connected to the modern feminist movement. Women as a gender have had decades of female empowerment stances to refer to and be influence by in their efforts to have themselves recognized as an equal to that of the male gender. The modern feminist keeps her femininity ate the forefront of her battle while also showing men that it is possible for a woman to have it all. The family, the career, the individual identity, and self-respect, are all elements that the previous promoters of the feminist movement have success fully managed to hand down to their counterparts from generation to generation, and generations to come. The agenda of woman's rights would not have been able to flourish without the support of the media, Bailey got that right. We all admit to and recognize the influence that various media have in our lives and point of view. Since the media has helped counter the effects of decades of female misconception by promoting them as equal to men in both ability and skill, men have come to learn to accept and respect women more as their equals rather than just being a gender in existence to serve their man, family, and society as members of a submissive gender. Struggling for the rights of a woman is directly related to the image that a woman carries of herself. But that image is oftentimes dictated by how society views them and their contributions on a larger scale. These days, women are at the forefront of most things related to our culture and traditions, so the mindset has changed in a significant way thus allowing for the emergence of a new image for women in the 21st century and beyond. Reflection on Kimmel's â€Å"Masculinity as Homophobia† When one hears the term â€Å"masculinity†, images of Brad Pitt, George Clooney, Sylvester Stallone, the like come to mind. They are the images of masculinity is today's world. These are the men who are emulated and admired by their fellow men because of who they are and what they have become. With those images in mind, it becomes easier to understand why the term â€Å"homophobia† cannot be used in the same sentence as masculinity. Yet Kimmel effectively does so in his essay. Just like Kimmel, I too have a personal belief that homophobia came to exist because of the way society viewed women as the weaker sex during significant eras of our history as a people. Men are looked upon unkindly when they prove to be weak at a certain gender based undertaking, or if they fail to accomplish a task that their counterparts could have completed as well. Homophobia is not a word that should only be used to define fear of a man who is attracted to the same gender. After reading the essay of Kimmel, I have come to understand that