Tuesday, December 24, 2019
The Problem Of Energy Production - 1870 Words
In todayââ¬â¢s society, itââ¬â¢s nearly impossible to open a newspaper, fire up a computer, or hold a conversation that isnââ¬â¢t someway related to energy. Since the beginning of the industrial revolution over a century and a half ago, nothing has been more pivotal to mankindââ¬â¢s rise to power as the apex species of planet earth. Had our ancestors not discovered the potential of using million year old plant and animal remains to create combustible power, the world would look very different. There is no denying that energy production is one of, if not, the most important developments in human history. After a hundred and fifty years of recklessly burning oil and coal, we find ourselves having to deal with the literal mess unforeseen by our industriousâ⬠¦show more contentâ⬠¦There are dozens, if not hundreds of oil and coal alternatives that are being considered, however, while many options look promising in theory the overwhelming majority of them such as: wind, solar, and biofuel just arenââ¬â¢t economically feasible on a global scale. Nuclear power is growing in popularity around the world for its extreme potency and zero emissions, but advancements in the field are few and far between due to the bad stigma that surrounds nuclear power. This negative stigma stems from its military roots and its potential for catastrophic disaster, which has become very real in the wake of Japanââ¬â¢s recent natural disasters. The answer to kicking our oil habit may actually be much simpler than any of these other alternatives. The key to securing our energy independence may have been under our feet the entire time we were bending to the oil cartelââ¬â¢s (OPECââ¬â¢s) every demand. Here in America we have been sitting atop a goldmine of natural gas wells that rank among the most abundant in the world. While natural gas is by no means a renewable source of energy, reserves are much more plentiful in America than oil. Natural gas also burns much cleaner than coal making it friendlier to our heavily burdened atmosphere. Current estimates put our nationââ¬â¢s natural gas supply somewhere around ââ¬Å"twenty five hundred trillion cubic feet of technically recoverable natural gas from all sourcesâ⬠(Deutch, 2011). Approximately six hundred to seven hundred cubic feet lies
Monday, December 16, 2019
Bloomââ¬â¢s Research and Response Free Essays
Bloomââ¬â¢s Research and Response Bloomââ¬â¢s Research and Response Benjamin Bloom developed Bloomââ¬â¢s Taxonomy of Education in 1956. It is a teaching system developed to classify learning objectives and skills (Larkin Burton, 2008). Lori Anderson and David Krathwohl revised the original publication- Bloomââ¬â¢s Taxonomy of Educational objectives and also added new knowledge and ideas to the original material. We will write a custom essay sample on Bloomââ¬â¢s Research and Response or any similar topic only for you Order Now This is the handbook in use by educators today. The Educational objectives that Bloom developed he categorized into three domains: Cognitive, Affective, and Psychomotor. Each domain has its own set of specific expectations. Bloom broke down his taxonomy into different levels of complexity. They are arraigned in a hierarchy from less to more complex. When teaching, the educator will use the levels so that mastery of the first level is necessary by the learner before the next level can be achieved. The Cognitive Domain focuses on knowledge and developing the skills of comprehension, it also uses critical thinking skills. There are six levels of complexity in this Domain: Knowledge, Comprehension, Application, Analysis, Synthesis, and Evaluation. The Affective Domain focuses on how the learner deals with emotions and with his ability to feel empathy for others. Bloom broke down this domain into five levels: Receiving (awareness), Responding (active participation in the learning process), Valuing, Organization, and Internalizing (values held that influence a behavior so it becomes a characteristic). The third domain, the Psychomotor Domain was not broken down into subcategories by Bloom but by Simpson in 1972. The Psychomotor Domain focuses on the ability to manipulate an object physically. This domain has seven levels: Perception, Set (readiness to act), Guided Response, Mechanism, Complex Overt Response (the ability to perform without hesitation), Adaptation, and Origination. When used, Bloomââ¬â¢s Taxonomy will provide the educator with a measurable way to assess the level of comprehension of the taught information by the learner (ââ¬Å"Big Dog and Little Dogââ¬â¢s Performance Juxtaposition,â⬠2010). Nurses can use Bloomââ¬â¢s teaching method in educating patients with chronic diseases. First the nurse must assess the patient for level of understanding and readiness to learn. The nurse uses the Cognitive Domain to teach the patient about his specific disease and to facilitate understanding of all concepts associated with the disease and its treatments. In following the hierarchy the nurse would start with the simplest information and ideas and increase the complexity of the information after the patient has exhibited comprehension of the previously taught material. Using the Affective Domain the nurse helps the patient deal with his emotions related to his diagnosis and to attach a value to it. Once a patient has processed the information given to him, realizes the importance of managing his care and placing a value on its importance, he is ready to use the psychomotor domain. The educator uses the Psychomotor domain to teach the skills portion of education. Diabetics need to learn how to use blood glucose testing equipment; patients may need to learn how to self-catheterize these are just two examples of skills that nurses teach that fall under this domain. There are many areas of education a nurse teaches daily. One of which is the information given to patients with chronic diseases in order for them to achieve or maintain self-sufficiency. Bloomââ¬â¢s teaching method gives those patients the best chance at mastering the necessary information and skills needed to live day-to-day with a chronic illness. References Big Dog and Little Dogââ¬â¢s Performance Juxtaposition. (2010). Retrieved from http://www. nwlink. com/~donclark/hrd/bloom. html Larkin, B. G. , Burton, K. J. (2008, September). Evaluating a Case Study Using Bloomââ¬â¢s Taxonomy of Education. AORN Journal, 88(3), 390-402 How to cite Bloomââ¬â¢s Research and Response, Essays
Saturday, December 7, 2019
Cult of Personality free essay sample
Throughout time, some leaders managed to create an aura around themselves which has made them more respected and loved by their followers. These leaders are called cult of personalities. Thesis statement: Despite its changing meaning over time, the term cult of personality was and is being used to define leaders who have successfully created a public image of charisma and used their image to make their followers believe that they are working towards a common goal for their own benefits. . The Change of Meaning of the Term Cult of Personality A. The term was used to describe dictators of totalitarian regimes that managed to create positive public emotions about themselves B. Currently, the term is used to describe charismatic leaders regardless of nature of intentions II. How a Leader Creates his/her Personality Cult A. Cult of personalities dress according to the periodic fashion trends to create an ideal image of themselves B. Cult of personalities create a caring and thoughtful image of themselves to make the public think that they are being thought of and being looked after C. Cult of personalities put or at least how that they put their peoples need ahead of their own needs Ill. The Dangers and Benefits of Existence of a Personality Cult A. The public has an image to look up to and an example to be like B. The cult of personality becomes a hope for the citizens and their self-confidence is raised C. There becomes a mutual value that holds the society together D.Since the public thinks their leader is working for themselves, they can be fooled and be blind to evil doings of the leader, and even contribute to their dangerous objectives E. The public might fanatically protect the leader and fail to see the mistakes ND therefore fail to correct it. Conclusion Despite being a bonding effect, entity of a cult of personality is dangerous since it might cause the public to fall in love with the ruler to the limit that they might miss that they are being used to reach an unethical and selfish goal: power. Every society has a leader.Since the beginning of human history there are examples of leaders who are loved, some of them feared, some respected; and some of them a combination of these. Some leaders have created such a powerful aura around themselves that they have been remembered and appreciated long after their time; people never forget what he/she means for them and even after his/her death, continue to love and support them to an extent that is similar to religious worship. These leaders who have been successful in creating a powerful charismatic entity are considered to have a cult of personality.In this paper, the aim is to inform the reader about the term cult of personality; how it evolved, how leaders who are defined as cult of personality create this and also if this is beneficial or harmful by using specific examples; namely John Fitzgerald Kennedy, Eva Person and Mustang Kamala Taurus. At first, the term cult of personality was used to describe dictators of totalitarian regimes that sought to radically alter or transform society according to radical ideas (Cult of Personality). A well-known example that matches this definition is Stalin. Stalin reconstructed the Soviet regime so that man serves communism rather than communism serves man as it was under Linens control (Youthfulness). However, in time, the definition changed. Today, the meaning that is in use is synonymous to a charismatic leader, regardless of the kind of ideologies that the leader has or or whom they work themselves or the members of the society. As mentioned above, three example leaders that will be further examined in this paper are Eva Person, Mustang Kamala Taurus and John Fitzgerald Kennedy, all famous worldwide.People accept them as heroes without giving much thought to what they have really accomplished. All of these three people were powerful political figures in their own countries, namely Argentina (By 28, She Had Set), Turkey and the United States of America (Willets 260). They were loved by the majority of their people, and even after their death are embedded with deep respect and almost fanatical love. (By 28, She Had Set). The self-images that these leaders created in the peoples eyes and their actions have made the public almost fall in love with them, and blindly follow them and their ideologies.They are like Hollywood stars, idols for the public; in some cases thought of as a parent to the citizens, caring for them and nourishing their needs in a way that has never been done before. Therefore, these three leaders are most suitable to explain the term cult of personality. All three of these personality cults have common characteristics. Firstly, all here of them pay great attention to their physical appearance. All three are known for being very stylishly fashionable, dressing according to the popular European fashion of their time. Eva Person, with her Parisian outfits, mink fur, diamonds, blonde-dyed hair and red lipstick, knew that the public wanted her to be beautiful, as she stated in her own words. (By 28, She Had Set). John F. Kennedy, with his way of dressing (Stark) and his beautiful wife who was a fashion icon of her era (Willets 263), put forward a glamorous style. Taurus, with his very well tailored Western clothes (Popper 55) is still respected by Turkish citizens for looking smart and fashionable.The style of these leaders has dollied them, as they dressed as how the average person wanted to. Secondly, they portray themselves as caring and emphatic, to make their people feel as fifthly are being watched after like children. In a way, they are being a parent to the nation. They all defend the poor, and therefore loved by them, and since the poor is the vast majority of the population, they become favored by the population. For example Kennedy worked really hard on workers rights, and gained their love and respect (Willets 264).Similar to that, Eva Person Foundation, founded by Eva, helped millions of poor people and did the work that normally the state is entitled to do (Foss 1 With her husband, she gave the Decrescendos the shirtless ones- the support they had never seen by giving them rights (Richards and Riley 127) and help through the Eva Person Foundation (Foss 1 Taurus gave the Turkish citizens something they never had, democracy, and educated them about its importance (Mustang Kamala That;ark. ). With their caring attitude towards the public, they are still commemorated literally as parents.Eva Person became Vita and little mother (By 28, She Had Set) whereas Mustang Kamala became Taurus elder Turk. Thirdly, cults of personality show that they are understanding and sacrificing. Person listened to the citizens and granted their wishes, she is even known to give fifty percent rise to workers when they asked for forty percent (By 28, She Had Set). Even during sickness, Person refused to rest. (By 28, She Had Set). Even their early deaths helped their images as leaders, and they became martyrs who died on duty.Kennedy was assassinated during a public rally (Willets 266), Vita died of Uterus cancer hen she was only 33 and while she was still the first lady (By 28, She Had Set), and Taurus died of cirrhosis at 57 during his term as the president (Mustang Kamala That;ark. Wisped). So, with their sacrifices these leaders made their people in a way entitled to continue defending their ideals and loving them. The factors that give a leader the personality cult are these. However, the question that has to be answered is: is presence of one dangerous or beneficial?Since cults of personality are generally apparent in totalitarian regimes (Wiggeries 8), this type of leader is considered ungenerous by intellectuals such as Marx (Daniels 212). However today it may be concluded that leaders such as Taurus have accomplished success using it in a positive way. Presence of a cult of personality gives people an ideal to look up to. In Turkish schools, still children are taught to admire and be like Taurus, and his values are still important throughout the society, and look as if they will be protected further.Kennedys charm and wits were characteristics that every American would like to be born with (Steel 24). Someone to look up to makes the society act more ethically, and therefore rates a healthier social environment. As people look up to someone who has come from within themselves, they develop a hope that someday they will accomplish things. For instance, Person is from a low class herself (By 28, She Had Set), and her moral and economic support to the poor gave them something to work for. On the other hand, Kennedy was from a wealthy background, he had high quality education and his family was portrayed as being perfect.Therefore J. F. Kennedy was the true adaptation of the American Dream itself to real life (Willets, 261-262), he proved to Americans hat dreams can come true. With Taurus making his cultural revolutions and showing them to the public to be for their own benefit, modernization became another reason for thanking Taurus (Outwits). Also by winning the Independence War, the Turkish nation began re-believing in itself. Memento of the independence war, tenacity and insistence are still common characteristic of Turkish people, and that is another thing a cult of personality creates: common values.The values and changes that a cult of personality brings to a society become mutual values of that society which hold it together. For example, in the Turkish society vast majority of Turkish people like Taurus, so no matter which class and background they are from, their Seemliest ideology makes them get along well (Mustang Kamala That;ark. ). On the other hand, existence of cult of personalities has negative sides too. Firstly, if the public loves the leader too much, they might fail to realize how they are being led toward an action they would not normally do, if they could see what it really is.They might be fooled into being blind to the unacceptable doings of the cult of personality. For instance, Kennedy nearly led his country awards a conflict with Cuba when he ordered marines to quarantine Cuba when the Soviets did not accept to take back their missiles (Willets 265). Person favored her family and gave them high-ranking job positions, spent millions for her personal jewelry, caused inflation and under her ruling educated civilians started getting the same salary with untrained workers (By 28, She Had Set).As it can be seen, the public fails to see the corruption of these leaders when there is a personality cult existence. Secondly, the over fanatical love felt toward the leader prevents his/her mistakes from getting erected. Normally, when there is a problem in a ruling system, it is fixed or at least tried to be fixed within the next generations. But since the cult of personality is over-respected, it is possible that even in the next generation mistakes can be continued to be made. Also modernization and new adaptations might be harder to apply to the society.In conclusion, every society needs a leader. From time to time along comes a leader who has the power to make-believe people that they are worthy again, and this way he/ she gains respect and popularity that continues even after their death. Despite the fact that existence of a cult of personality makes it easier for the society to work towards a common goal, it is at the same time very dangerous, since it can trick people to do things they would not normally do. The occurrence of a cult of personality can be blinding.If the leader has good intentions this blinding can be positive but if the leader has selfish intentions, this blinding might even lead the society to self-destruction, and even mass massacres. Human beings should make their own decisions with their own judgments, and not leave this responsibility to their leaders, even if the traders are making decisions that are good for the people. The only factor that should manipulate a persons decisions is that persons own will.
Saturday, November 30, 2019
Should plastic bag be banned free essay sample
Today Im going to talk about plastic bags and whether they should be banned. As you may know, plastic bags are one of the main sources of rubbish that end up polluting our rivers and oceans. In fact, the problem has become so immense that a huge island of rubbish containing plastic bags and other items has formed in the middle of the Northern Pacific Ocean. The area polluted by this rubbish is so vast that it covers an area greater than the size of Australia. So should plastic bags be banned? Plastic bags are a non-biodegradable, which means it they cannot decompose naturally. So they will remain on the earth forever. Plastic bags can cause environmental destruction and harm human health when they enter our environment. Pollution from plastic bags is known to make soil unfertile and can cause lung diseases like asthma when toxic gases are emitted from burning plastic bags. We will write a custom essay sample on Should plastic bag be banned or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Plastic bags are also responsible for the deaths of many animals on land and in the sea. For example, scientists have found sea turtles that have swallowed plastic bags because they mistake them for jellyfish. Sea turtles can live for many years and are very important for the biodiversity of our oceans. Many are now suffering slow and painful deaths because they cannot digest a plastic bag when swallowed. Why should we continue to use plastic bags when we only use them once? Because they cannot be recycled, we should consider using other more sustainable bags. Good examples already exist in other countries where they promote the use of canvas bags in supermarkets. In fact, plastic bags have been banned all together from one major city in Australia. Whilst banning plastic bags is unlikely to be supported in Malaysia, we need an education campaign to inform everyone about the environmental problems caused by plastic bags. Then, people may think twice before using a plastic bag next time they go shopping.
Tuesday, November 26, 2019
ERA - The Equal Rights Amendment
ERA - The Equal Rights Amendment Free Online Research Papers The Equal Rights Amendment began its earliest discussions in 1920. These discussions took place immediately after two-thirds of the states approved womenââ¬â¢s suffrage. The nineteenth century was intertwined with several feminist movements such as abortion, temperance, birth control and equality. Many lobbyists and political education groups formed in these times. One such organization is the Eagle Forum, who claims to lead the pro-family movement. On the opposite side of the coin is The National Organization for Women, or NOW, which takes action to better the position of women in society. Feminism is the most powerful force for change in our time. The Equal Rights Amendment has been a powerfully debated subject for decades. Having passed the Senate with a vote of 84-8, it failed to get the requisite thirty-eight states to ratify it. Many discussions and arguments arise over the continued push for the Equal Rights Amendment. The need for change must be a consensus and achieved both nationally and at the state level. The attempt to ratify the Equal Rights Amendment continues, but with few supports left, it appears to have lost its momentum. The supporters of the Equal Rights Amendment seem to feel sex discrimination laws are simply not enough. The federal laws and regulations contain many loopholes, are inconsistently interpreted and may be repealed outright (NOW 1). Many supporters claim the Equal Rights Amendment is needed ââ¬Å"to clarify law for the lower courts, whose decisions still reflect confusion and inconsistency about how to deal with sex discrimination claims (Francis 2). There is a supporting theory argument that ââ¬Å"an amendment of equality would absolutely shift the burden away from those fighting discrimination and place it where it belongs, on those that deserve it. They wonââ¬â¢t have to justify why discrimination should be allowed, rather than women having to explain why we deserve equalityâ⬠(Gaughen 13). Some supporters say that because womenââ¬â¢s salaries still lag behind men, we need an Equal Rights Amendment more than ever (Hennessey 3). The real issue, claim some supporters, is the ââ¬Å"right to bodily integrity, and without this basic right, women can have no true freedomâ⬠(NOW 2). Legal sex discrimination is not a thing of the past, and the progress of the last forty years is not irreversible without the protection of an amendment (Francis 1). Feminist claim that ââ¬Å"The ERAââ¬â¢s most valuable effect would be the psychological victory it would provide womenâ⬠(Steiner 35). Women are underpaid in the workforce, required to pay higher insurance premiums and are half as likely as men to get pensions (NOW 4). Supporter of the Equal Rights Amendment remind us of a traditional assumption, ââ¬ËMen hold rights and women must prove that they hold themâ⬠(Francis 2). Supporter claim amazement that, ââ¬Å"Even in the twenty first century, the United States Constitution does not explicitly guarantee that all the rights it protects are held equally by all citizensâ⬠(Francis 4). Supporters of the Equal Rights Amendment believe that ââ¬Å"unless we put into the Constitution the bedrock principle that equality of rights cannot be denied or abridged on account of sex, the political and judicial victories women have achieved with their blood, sweat and tears for the past two centuries are vulnerableâ⬠(Franc is 2). Opponents of the Equal Rights Amendment seem to feel women have everything they need. Women are still evolving from the age-old roots of childbearing, to the new necessities of selfhood, personhood, economically rewarding work and the new possibilities of choice, personal control and personal growth (Friedman 233). Opponents believe the Equal Rights Amendment would be hurtful to women, to men, to the family, to local government and to society as a whole (Schlafly 68). ââ¬Å"Women are entering the workforce, running for political office and seeking jobs once closed to them in record numbersâ⬠which, supporter agree, make an Equal Rights Amendment unnecessary (Baldez 244). The Equal Rights Amendment will not give women more educational or employment opportunities, more pay, more promotions, employment rights or choices that they do not now have (Schlafly 118). The Equal Rights Amendment can do little more for women than they already have achieved by legislation and favorable judi cial rulings and to pursue the fight for an Equal rights Amendment in order to gain only marginal benefits involves heavy costs (Steiner 37). Many, on- the-fence opponents of the Equal Rights Amendment would gladly change their minds ââ¬Å"if someone could to a specific slight or some issue where women have unequal rights, but changing the Constitution for the sake of making a statement is a waste of timeâ⬠(Kellams 1). Opponents claim that women already enjoy every Constitutional right that men enjoy and have enjoyed equal employment opportunities since 1961 (Lopez 1). Women would not gain any new employment rights whatsoever because federal employment laws are already completely sex neutral (Schlafly 69). Decisions of the Supreme Court can now do everything an Equal Rights Amendment can do and more so, opponents argue, ââ¬Å"It is difficult to see the need for the Equal Rights Amendments installment in the Constitution, when the United States Supreme Court has largely fulfilled the amendments chief objectivesâ⬠(Baldez 245). Some women do not believe the Equal Rights Amendment is needed because women ââ¬Å"d o not need special protectingâ⬠adding, ââ¬Å"it is not necessary because women are now sitting in seats once occupied by men and do not believe they got there because they are womenâ⬠(Hennessey 3). When address with inequality in education, politics, the law and at home, opponents of the Equal Rights Amendment argue thatâ⬠women are entitled to the same rights as men, and the natural rights of civilized men and women are government, property, harmonious development of all their powers and the gratification of their desiresâ⬠(Gaughen 21). Women are now judged by their abilities and the womenââ¬â¢s liberation movement deliberately degrades the homemaker, hacks away at her self-esteem and self-worth, while stripping her of her pride and pleasure in being a female. The best cure for women is to stop listening to women libbers (Schlafly 68). Womenââ¬â¢s rights have certainly come a long way. Maybe the most important thing that we learned over the decades is that everyone has choices. Women can freely choose to stay at home during one part of their life and are free to pursue other possibilities later, if she should so chose. Some wonder if we have a long way to go for equality, while some wonder if we have won the booby prize being treated like men. Women, as individuals, have to make decisions that are appropriate for them. Each womanââ¬â¢s situation, lifestyle, dreams, desires and values are different. The world and its opportunities belong, not to the militant women with her strident demands for a gender-free society, but to a positive woman who achieves a sound perspective on life, then fixes her own personal priorities (Schlafly 2). Francis, Roberta. ââ¬Å"Why We Need The Equal Rights Amendment.â⬠National Council of Womenââ¬â¢s Organizations. Dec.2000. pp1-5 . Freidman, Betty. The Second Stage. New York: The Summit Books, 1981. Gaughen, Shasta. Introduction To Womenââ¬â¢s Rights: Contemporary Issues Companion San Diego: Greenhaven Press, 2003. Hennessey, Kathleen. ââ¬ËNevada Lawmaker Raises Equal Rights Issue.â⬠Las Vegas Sun 22 Nov. 2006: B3. lasvegassun.com/html. Kellams, Laura.â⬠26 Years Later, Senate to Vote on ERA Issue: Effect on Resolution Unknown.â⬠Arkansas Democrat-Gazette 27 March 2005:D1. . Lopez, Kathryn. ââ¬Å"ERA: Equality for Whom?â⬠Sacramento Bee 22 June 2001: D2.. Schlafly, Phyllis. The Power of the Positive Women. New York: Arlington House Press, 1977. Steiner, Gilbert. Constitutional Inequality. Washington D.C.: The Brookings Institution, 1985. ââ¬Å"Who Needs An Equal Rights Amendment? You Do! National Organization for Women Jan.2006. now.org/issues/economics/html. Research Papers on The Equal Rights Amendment19 Century Society: A Deeply Divided EraQuebec and CanadaDeontological Teleological TheoriesInfluences of Socio-Economic Status of Married MalesThe Fifth HorsemanAssess the importance of Nationalism 1815-1850 EuropeHip-Hop is ArtBooker T. Washington, W.E.B. Du Bois, Ida B. Wells-BarnettDefinition of Export QuotasThe Effects of Illegal Immigration
Friday, November 22, 2019
Not All Iron Is Magnetic (Magnetic Elements)
Not All Iron Is Magnetic (Magnetic Elements) Heres an element factoid for you: Not all iron is magnetic. The a allotrope is magnetic, yet when the temperature increases so that the a form changes to the b form, the magnetism disappears even though the lattice doesnt change. Key Takeaways: Not All Iron Is Magnetic Most people think of iron as a magnetic material. Iron is ferromagnetic (attracted to magnets), but only within a certain temperature range and other specific conditions.Iron is magnetic in its à ± form. The à ± form occurs below a special temperature called the Curie point, which is 770à à °C. Iron is paramagnetic above this temperature and only weakly attracted to a magnetic field.Magnetic materials consist of atoms with partially-filled electron shells. So, most magnetic materials are metals. Other magnetic elements include nickel and cobalt.Nonmagnetic (diamagnetic) metals include copper, gold, and silver. Why Iron Is Magnetic (Sometimes) Ferromagnetism is the mechanism by which materials are attracted to magnets and form permanent magnets. The word actually means iron-magnetism because that is the most familiar example of the phenomenon and the one scientists first studied. Ferromagnetism is a quantum mechanical property of a material. It depends on its microstructure and crystalline state, which can be affected by temperature and composition. The quantum mechanical property is determined by the behavior of electrons. Specifically, a substance needs a magnetic dipole moment in order to be a magnet, which comes from atoms with partially-filled electron shells. Atoms will filled electron shells are not magnetic because they have a net dipole moment of zero. Iron and other transition metals have partially-filled electrons shells, so some of these elements and their compounds are magnetic. In atoms of magnetic elements nearly all of the dipoles align below a special temperature called the Curie point. For iron, the Curie point occurs at 770à à °C. Below this temperature, iron is ferromagnetic (strongly attracted to a magnet), but above it the iron changes its crystalline structure and become paramagnetic (only weakly attacted to a magnet). Other Magnetic Elements Iron isnt the only element that displays magnetism. Nickel, cobalt, gadolinium, terbium, and dysprosium are also ferromagnetic. As with iron, the magnetic properties of these elements depends on their crystal structure and whether the metal is below its Curie point. à ±-iron, cobalt, and nickel are ferromagnetic, while à ³-iron, manganese, and chromium are antiferromagnetic. Lithium gas is magnetic when cooled below 1 kelvin. Under certain condition, manganese, the actinides (e.g., plutonium and neptunium), and ruthenium are ferromagnetic. While magnetism most often occurs in metals, it also occurs rarely in nonmetals. Liquid oxygen, for example, may be trapped between the poles of a magnet! Oxygen has unpaired electrons, allowing it to react to a magnet. Boron is another nonmetal that displays paramagnetic attraction greater than its diamagnetic repulsion. Magnetic and Nonmagnetic Steel Steel is an iron-based alloy. Most forms of steel, including stainless steel, are magnetic. There are two broad types of stainless steels which display different crystal lattice structures from one another. Ferritic stainless steels are iron-chromium alloys that are ferromagnetic at room temperature. While normally unmagnetized, ferritic steel become magnetized in the presence of a magnetic field and remain magnetized for some time after the magnet is removed. The metal atoms in ferritic stainless steel are arranged in a body-centered (bcc) lattic. Austenitic stainless steels tend to be nonmagnetic. These steels contain atoms arranged in a face-centered cubic (fcc) lattice. The most popular type of stainless steel, Type 304, contains iron, chromium, and nickel (each magnetic on its own). Yet, atoms in this alloy usually have the fcc lattice structure, resulting in a nonmagnetic alloy. Type 304 does become partly ferromagnetic if the steel is bent at room temperature. Metals That Arent Magnetic While some metals are magnetic, most are not. Key examples include copper, gold, silver, lead, aluminum, tin, titanium, zinc, and bismuth. These elements and their alloys are diamagnetic. Nonmagnetic alloys include brass and bronze. These metals weakly repel magnets, but not usually enough that the effect is noticeable. Carbon is a strongly diamagnetic nonmetal. In fact, some types of graphite repel magnets strongly enough to levitate a strong magnet. Source Devine, Thomas. Why dont magnets work on some stainless steels? Scientific American.
Wednesday, November 20, 2019
(DEGREE LEVEL) INESTIGATING THE SOCIAL Essay Example | Topics and Well Written Essays - 1000 words
(DEGREE LEVEL) INESTIGATING THE SOCIAL - Essay Example 26). The National Health Service (NHS) was created on 5 July 1948 (National Health Services). Aneurin Bevan, the Minister of Health in the 1940ââ¬â¢s, is seen as the architect of NHS (Gorsky 2008, p.437, 452). As mentioned above, the World War II bombings by Germany mobilized several interest groups and connected them. World War II served as a stressor, whose effects were made public by the Beveridge Report. However, the factor that did not let the effect of this event fade was Bevan. Thus, the aim of this research is to look at how the factors mentioned above influenced the interest groups in forming NHS. The Beveridge Report (Beveridge, 1942) is used to examine the ability of reports to shock their readers. This report was made with the purpose of evaluating the reconstruction needs which were caused by the 1940 bombings (Beveridge 1942, p. 5). Its advantage is that quantitative and objective data are presented. Observations were made in a natural environment. The report provides a background to the problem, indicating that reconstruction is only a part of the story and that more fundamental changes are required. However, its weakness is that as in case of every other report, this too has its own agenda. The government commissioned this report, so one could easily assume that it was in governmentââ¬â¢s best interest to present a gloomy picture of the existing system to the public. Another source is the interview with Bevan from 1949 (2009). Though this source offers a firsthand insight into the needs that led to NHS, this source is also subjective. Bevan is seen as the architect of NHS, implying that he possessed the ins and outs of development of the Act on NHS, its passing and creation of NHS. However, this interview is his personal view on events that happened in the 1940ââ¬â¢s. Since he was a politician, his statements were designed to win over the voters by giving them
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