Determining Avogadro’s Constant and Faraday’s Constant

Determining Avogadro’s Constant and Faraday’s Constant List of Apparatus Name of Apparatus Quantity Uncertainty Electronic Stopwatch 1  ±0.2s Ammeter 1  ±0.01A Wires with crocodile clips 1 D.C power source 1  ±0.01V 300cm3 Beaker 3 Copper strips 2 Sand paper 1 Graphite rod 2 pH probe/data-logger 1  ±0.2 Electronic weighing balance 1  ±0.001 DATA COLLECTION: The electrolytic cell used in this investigation is illustrated in Fig 1: Fig 1 Diagram of electrolytic cell used in investigation In this investigation, a current is passed through the solution with copper as the cathode and graphite as the anode. After a set amount of time, the circuit is disconnected and the mass of the cathode is measured. Following which, calculations are made so as to determine the Avogadro’s and Faraday’s constant. Qualitative Observations When the D.C power source was turned on, bubbles were formed at the Graphite anode. As the reaction progresses, powdery substance gets suspended in the solution and a black solid deposits can be found at the bottom of the beaker and there is a visible decomposition of the graphite electrode. As the reaction progress, a pink layer of copper forms on the copper strip. The copper strip is originally brown in colour while the graphite electrode is black in colour. Eventually, as the graphite electrode decomposes, the graphite molecules will turn the copper (II) sulphate solution from blue to black in colour. However, when the copper sulfate solution is filtered, it is noted that there is a decrease in the intensity of the blue colour in the filtrate after the electrolysis. The initial pH of the solution is 2.75, after the electrolysis is carried out, the pH decreases to 2.10. Data Collection Constant variables Time Interval/s( ±0.2) 300 Voltage/V 4V Current/A( ±0.01) 0.25 Cathode Trial 1 Initial mass/g ( ± 0.001 g) 1.315 Final mass/g ( ± 0.001 g) 1.279 Change in mass/g ( ± 0.002 g) 0.036 Chemical equation for reaction at the anode: 2H2O (l) à ¯Ã†â€™Ã‚  O2 (g) + 4H+ + 4e (aq) Chemical equation for reaction at the cathode: Cu2+ (aq) + 2e à ¯Ã†â€™Ã‚   Cu (s) Calculations for cathode Calculations Error Propagation Change in mass(Cu) = 0.036g Mols of (Cu) = =5.7 x 10-4 mol Number of mol of electrons- Using mol ratio Cu2+ (aq) + 2e à ¯Ã†â€™Ã‚   Cu (s) Number of mol of electrons =11.4 x 10-4 Charge flowing through circuit Number of electron charges in circut= Where is the elementary charge, the charge of one electron Number of electron charges in circuit = Number of mol of electrons Where L is the Avagandro’s constant Equating the number of mols of electrons obtained form the copper mass data and the number of mol of electrons from the current- Faraday’s constant = = 67000 C % ±ÃŽâ€ Mol of Cu = % ±ÃŽâ€ Mol of Cu = = 5.6 % % Uncertainty of number of mol of electrons = % uncertainty of Mass(Cu) =5.6% % uncertainty of number of mol of electrons =5.6% % ±ÃŽâ€ charge flowing in circuit = Percentage error Percentage error for Faraday’s Constant = = = 30% Percentage uncertainty of faraday’s constant =5.9% Percentage systematic error in Faradays’ constant =%error-%random error = 24.1% Percentage error for Avogadro’s Constant = = 30% Percentage uncertainty of Avogadro’s Constant =5.9% Percentage systematic error in Avogadro’s Constant =%error-%random error = 24.1% Conclusion In conclusion, the calculated value of Faraday’s constant is mol-1 and Avogadro’s constant is. As seen above, the percentage error for both Faraday’s constant and Avogadro’s constant are both 30% and after subtracting the error due to instrumental uncertainty, the % systematic error obtained is 24.1%. This shows that the experimental values calculated differ greatly from the literature values, indicating that there has been a significant amount of systematic error, which has caused the calculated value to be much different from the literature value. As percentage error of both Faraday’s constant and Avogadro’s constant are much larger than their respective percentage uncertainties, this indicates that the sources of systematic error are significant and cannot be ignored Evaluation Type of error Limitation Improvement Systematic Oxidation of copper occurs naturally when the copper strip is exposed to oxygen and when it is heated in the oven. Even when sand paper is used to scratch off the layer of copper oxide on the surface of the, it is difficult to completely rid of all the copper oxide. The formation of copper oxide will affect the reaction when electrolysis occurs and will affect the change in mass of the copper electrode, which is the dependent variable in this experiment. Even when the copper strip is immersed in the copper (II) sulphate solution, after a period of time, it will eventually start to form a layer of copper (II) oxide which will not be involved in the electrolysis reaction. This will reduce the amount of copper which will undergo reaction, causing it to reduce the eventual calculated Faraday’s and Avogadro’s constant. It is impossible to prevent the oxidation of copper from happening however, this systematic error can be minimised. Other than ensuring that the layer of copper oxide is scratched off by rubbing the copper strip excessively with sandpaper. The time for which the copper stays in the oven can be minimised or hair dryer can be used instead to blow the water off. Systematic When the graphite electrode starts to disintegrates as the reaction progresses, fragments of graphite will be dispersed throughout the entire solution. As copper (II) ions move towards the copper strip to plate it, some of the graphite fragments may end up attached to the copper strip as well and are unable to fall off as a layer of copper plates over the graphite fragments. This can be observed in the experiment when the copper strip is removed at the end of the experiment; black fragments of graphite are observed on the copper strip. The graphite fragments would easily reach the copper strip mainly because they were quite near each other. Hence, the graphite fragments could easily move towards the copper strips and attach to them. In order to minimise this from happening, the experiment should be conducting in a 500cm3 beaker, with the copper strip and the graphite electrode held further away from each other. Also, the graphite electrode should be positioned below the copper strip so that as the graphite electrode disintegrates, the graphite fragments will simply sink towards the bottom of the beaker, hence it will be less likely for the graphite fragments to accidentally coat onto the copper electrode Systematic Fluctuations in the current. Whenever the 2 electrodes were moved, the current of the circuit changes. Hence, whenever the copper electrode was moved in order to be weighed, the current would fluctuate, resulting in an inconsistent current throughout the experiment. If the current deviates from the stated 0.25, the resulting Faraday’s constant and Avogadro’s constant will be affected as well. An increase in current will result in an increase in the Faraday’s constant and Avogadro’s constant calculated while a decrease in current will result in a decrease in the Faraday’s constant and Avogadro’s constant calculated. In order to prevent fluctuations in the current as a result of the shifting electrodes, a retort stand can be used to hold the electrodes in place and prevent them from moving. This is much more reliable than just using hands to hold the electrode, resulting in a reduction in the fluctuation of the current A rheostat can be used and included in the circuit in order to adjust the amount of resistance of the circuit so that the desired current can be achieved. As current is inversely proportionate to resistance according to Ohm’s law, the resistance of the circuit can be adjusted in order to ensure a consistent current of 0.3 throughout the experiment. Systematic Also, another source of systematic error in this experiment would come from the fact that, the reading on the ammeter does not indicate the actual electric current flowing through the electrodes and the electrolyte as this value may decrease due to power losses in the wires. That is the electrical energy would be converted to heat. However the resistance of the wires in the circuit was assumed to be negligible in this experiment for simplicity. This would lead to systematic error as we would consistently overestimate the magnitude of the current flowing through the electrolyte. This error can be avoided if the values of the resistance of the wires as well as the internal resistance of the power source were known and included in the calculations made. Systematic The copper electrode may undergo a process called passivation[1] where the metal forms a protective layer on its surface to protect it from outer factors such as water or air to prevent corrosion. Such a protective layer will result in a high resistance which will lead to a voltage delay. This process may also occur on the graphite electrode. During the reaction, in the presence of passivation, the initial rate of the increase in mass of the copper electrode will be slowed down; ultimately affecting the total gain in mass by the copper electrode, affecting the Faraday’s constant and Avogadro’s constant calculated. This process of passivation can be removed by allowing the reaction to progress for 5 minutes to avoid a voltage delay. 5 minutes was chosen because too short a time will be insufficient to remove the protective layer on the electrode and too long a time will result in the disintegration of the graphite electrode even before the collection of data has begun. As mentioned above, if there is too much graphite fragments in the copper (II) sulphate solution, they may come into contact with the copper electrode and affect its final mass as copper ions plate over the graphite fragments on the copper electrode. Random Error Due to time constrains, only one set of data was collected. This will result in the fluctuation of the value of the Faraday’s and Avogadro’s constant. In order to reduce the error, perhaps more sets of data can be collected, so that a graph of metal deposited against time can be plotted and the gradient will enable the determination of the two constants. [1] Metal passivation-en.w,wikepedia.org/Passivation_(Chemistry). Accessed- 26/2/2014)

Free Essays on Vouchers, School Choice, and Charter Schools :: Argumentative Persuasive Topics

School Choice and Charter Schools    I am not so sure I am for or against the idea of school choice as much as the idea for educational equality. If school choice and charter schools are the way this country will gain equity in the schools then I am for school choice. I feel that the impoverished are not going to get the best education that is available to them in their area. If the town fifteen miles away is a much better school, both educationally and developmentally, then I believe that the student that goes to school A should have the opportunity to attend school B. Why should someone who was born into an underpriviledged home live an underpriviledged life? This child did not choose to be born into this family, so I believe we should give them some kind of choice in their lives. A good education, along with other assets that one can gain through education, is the answer to bettering one's life. It gives these childrenm the choice to make a different life for themselves and for their children.    I am not so sure that there is an ideal school choice program, but then again does there really have to be? Choice is choice. If I am given the opportunity to choose, I will most likely make the right decision or I will fix the mistake that I made. If people are given the chance to better their lives, they will take that opportunity, if they are smart. We, as change agents, are not responsible to hold the hands of those who do not take the bull by the horn! There is only so much people can do for others. Give them the choice, and if they take it greeat, and if they don't, what else can we possibly do.    I think the only responsibilty of the change agents are to inform the public of their choices. Let the public know what is out there, and what the benefits are to school choice. Most people are going to wonder why they should take the trouble to transport their children to a school that might be a little farther than the school in the neighborhood. I believe that it is also very important to give many choices. I think it would be a mistake to limit the students to certain schools. Free Essays on Vouchers, School Choice, and Charter Schools :: Argumentative Persuasive Topics School Choice and Charter Schools    I am not so sure I am for or against the idea of school choice as much as the idea for educational equality. If school choice and charter schools are the way this country will gain equity in the schools then I am for school choice. I feel that the impoverished are not going to get the best education that is available to them in their area. If the town fifteen miles away is a much better school, both educationally and developmentally, then I believe that the student that goes to school A should have the opportunity to attend school B. Why should someone who was born into an underpriviledged home live an underpriviledged life? This child did not choose to be born into this family, so I believe we should give them some kind of choice in their lives. A good education, along with other assets that one can gain through education, is the answer to bettering one's life. It gives these childrenm the choice to make a different life for themselves and for their children.    I am not so sure that there is an ideal school choice program, but then again does there really have to be? Choice is choice. If I am given the opportunity to choose, I will most likely make the right decision or I will fix the mistake that I made. If people are given the chance to better their lives, they will take that opportunity, if they are smart. We, as change agents, are not responsible to hold the hands of those who do not take the bull by the horn! There is only so much people can do for others. Give them the choice, and if they take it greeat, and if they don't, what else can we possibly do.    I think the only responsibilty of the change agents are to inform the public of their choices. Let the public know what is out there, and what the benefits are to school choice. Most people are going to wonder why they should take the trouble to transport their children to a school that might be a little farther than the school in the neighborhood. I believe that it is also very important to give many choices. I think it would be a mistake to limit the students to certain schools.

Analyzing the Tragedy of Dr. Faustus

Alfonso Villarreal Mrs. Bohn World Literature Honors April 9, 2012 Analyzing the Tragedy of Dr. Faustus The struggle between good and evil is arguably the most significant theme in the play. This struggle is most evident within the main character Faustus. He is torn and undecided about whether or not he should repent for sinning and return to God or follow through with the contract he signed with Lucifer. His internal struggle lasts almost the entire play, as part of him wants to be good serving God while the other part seeks the power Mephastophilis promises. Metaphastophilis himself has mixed motives and symbolizes this theme.On one hand he pursues Faustus’ soul, intending to carry it to hell while on the other he persuades Faustus to reject the contract because of the horrors he would encounter in hell. This theme, mostly existing within Faustus, provides interest and intrigue as to wonder if whether or not the highly intellectual doctor will finally come to his senses and repent. The play would be significantly less enjoyable if it followed a less interesting man, a man who morally feels no regret in giving up any chance of a positive afterlife for temporary powers. This indecision within Faustus also provides the central drama of the play.The struggle between good and evil is best symbolized by the Good and Evil Angels. Each angel struggled to pull Faustus towards its side as Faustus himself struggled between his human reason or logic and his lustful desire for power. Good and evil battle once more when Faustus encounters the Old Man in the final scene. The Old Man is another symbol which replaces the Good and Evil Angels from earlier scenes. He persuades Faustus to repent and renounce his powers while it’s not too late. Marlowe uses mythological allusions in a rather clever way in this particular work.They provide the audience with a more interesting play and extends the limits of the play’s subject if even slightly. One of the most s ignificant allusions was one performed in Faustus’ visit to Charles V’s court. Charles V pleads Faustus to perform sorcery for him, an allusion of Alexander the Great and his lover. Faustus performs a simple trick and Alexander suddenly appears before the emperor’s eyes. The purpose of this allusion is to show another great feat performed by Faustus and one that certainly brings interest to one of the most powerful men in the world.Marlowe was in some aspects a Renaissance writer and his work was a product of the age. He uses these allusions in the play to illuminate the transition between old beliefs and new ideas and knowledge. This transition served as one of the essential elements in the movement and Marlowe applies it with ease in his great work. â€Å"What art thou, Faustus, but a man condemned to die? † (IV, v, 25) The quote above addresses many essential aspects of the play. One of these aspects is the struggle between good and evil, a theme repre sented most by Faustus and his indecision. This quote indicates this theme of the play more than any other.Yes, Faustus is speaking his most troubled thoughts. What is he if not a fool who sold his soul for a temporary power only to perish in an eternal fire? Again it is evident that he struggles with his two most important principles, his lust for power and his reason. He ponders whether or not he made the right choice. The fact that he even struggles with this is ironic at the very least. One of the most intelligent men of his time is too blind to see the horror in Hell. This quote is also significant in that it represents his tragic fall as his corrupt morality prevents him from repenting in time and ultimately dooms him to an eternity in Hell.

8 Reasons Why People Drink Soda Essays

8 Reasons Why People Drink Soda Essays 8 Reasons Why People Drink Soda Paper 8 Reasons Why People Drink Soda Paper Essay Topic: The Bean Eaters 8 Reasons Why People Drink Soda 16 Reasons To Give Up Soda Drinking [pic] Most of us drink soda. Some drink more than others. And probably many regular soda drinkers are aware that soft drinks are bad for the health. At the same time, United States ranks first among countries in soft drink consumption. I think we need to know more about this drink that we love so much. And so here are 8 reasons why we drink soda: 1Its Very Tasty! The taste could be one thing that gets us addicted to drinking soda, it is delicious. In fact, it is so good, that many people drink it with every meal! Its Everywhere! [pic] Even if you wanted to drink something else, you would be hard-pressed to find it as prominently displayed in vending machines, at fast-food chains, and supermarket checkouts. You might not realize how ubiquitous Coke, Pepsi, and the like are in our society until you try to stop drinking soda. 3Convenience, Grab-n-Go! The most addictive thing about soda is the co nvenience. If you want something quick or are in a hurry, it is so easy to grab and convenient to drink. 4Promotion and Advertising [pic] Soft drinks are heavily consumed in part because companies promote them vigorously Billions of dollars are spend on advertising sodas and market them everywhere in stores, restaurants, gas stations, museums, and even schools. 5Soda Habit For some people, drinking several sodas a day is a force of habit. You know drinking soda is a habit when you find yourself going to the grocery store at 10 p. m. because your refrigerator is tapped out. 6It Is Cheap Soda may be pretty inexpensive when compared with fruit juice and milk. With combo meals, a large soda is only an extra dollar, and you get fries! Thirst Often people drink soda to quench the thirst. However, this is probably the worst time to drink soda, because when you are very thirsty or dehydrated you have low levels of saliva. And saliva helps to neutralize acids (soda is the most acidic beverage you can buy) and wash your teeth clean. 8Caffeine Addiction Many soft drinks contain caffeine and caffeine is mildly addictive. This f act is part of the reason soda is such a hard habit to break. If youre addicted to the caffeine in soda, youre really having two habits the soda habit and the caffeine habit. 6 Reasons To Stop Drinking Soda These were reasons why we drink soda and here are 16 powerful reasons to give up soda drinking. Do you know the extent to which drinking carbonated, caffeinated, sugared, or artificially sweetened beverages harms your body? Giving up soft drinks can be one of the best things you can do to improve your health. 1Soda Is Useless. First of all, there are no nutritionally beneficial components in soft drinks. Soft drinks mostly consist of filtered water and refined sugars. Yet the average American drinks about  57 gallons of soft drinks  each year. Weight Gain Obesity [pic] Many people either forget or dont realize how many extra calories they consume in what they drink. Drinking a single 330 ml can a day of sugary drinks translates to more than 1lb of weight gain every month. S everal scientific studies have provided experimental evidence that soft drinks are directly related to weight gain. The relationship between soft drink consumption and body weight is so strong that researchers2  calculate that for each additional soda consumed, the risk of obesity increases 1. 6 times. According to the results of high quality study3  reducing consumption of sugar-sweetened beverages helped reduce body mass index in the heaviest teenagers. 3Diabetes [pic] This is a consequence of #2. Anything that promotes weight gain increases the risk of diabetes. Drinking soda not only contributes to making people fat, but it also stresses the bodys ability to process sugar5. Some scientists now suspect that the sweet stuff may help explain why the number of Americans with type 2 diabetes has tripled from 6. 6 million in 1980 to 20. million today. Rapidly absorbed carbohydrates like high fructose corn syrup put more strain on insulin-producing cells than other foods. When sugar enters the bloodstream quickly, the pancreas has to secrete large amounts of insulin for the body to process it. Some scientists believe that the unceasing demands that a soda habit places on the pancreas may ultimately leave it unable to keep up with the bodys need for insulin. Also, insulin itself beco mes less effective at processing sugar; both conditions contribute to the risk of developing diabetes. Interestingly, women who consumed a lot of fruit juicewhich is high in natural fructosewere not at increased risk of diabetes, leading researchers to speculate that naturally occurring sugars may have different metabolic effects than added sugars. They also speculate that vitamins, minerals, fiber, and phytochemicals in fruit juices may have a protective effect against weight gain and diabetes, counterbalancing the adverse effects of sugar. Researchers from Brigham and Womens Hospital in Boston and Harvard Medical School4  analyzed data from the Nurses Health Study II, a trial tracking the health of more than 51,000 women. None of the participants had diabetes at the onset of the study in 1991. Over the following 8 years, 741 women were diagnosed with the disease. Researchers found that women who drank one or more sugary drinks a day gained more weight and were 83% more likely to develop type 2 diabetes than those who imbibed less than once a month. 4Weakened Bones And Risk Of Osteoporosis Frequent consumption of soft drinks may also increase the risk of osteoporosis,6  especially in people who drink soft drinks instead of calcium-rich milk7. High soda consumption (particularly cola15) in children poses a significant risk factor for impaired calcification of growing bones. In the 1950s, children drank 3 cups of milk for every 1 cup of sugary drinks. Today that ratio is reversed: 3 cups of sugary drinks for every cup of milk. Tellingly, osteoporosis is a major health threat for 44 million Americans. Most experts now say that the real culprit is sodas displacement of milk in the diet, though some scientists believe that the acidity of colas may be weakening bones by promoting the loss of calcium. Dental Caries And Erosion Soda eats up and dissolves the tooth enamel8. Researches9  say that soft drinks are responsible for doubling or tripling the incidence of tooth decay. The acidity can dissolve the mineral content of the enamel, making the teeth weaker, more sensitive, and more susceptible to decay. Sodas acidity makes it even worse for teeth than the solid sugar found in candy. Dental experts continue to urge that people drink less soda pop, especially between meals, to prevent tooth decay and dental erosion. 6Kidney Damage People who down sugary drinks dont feel as full as those who consume the same amount of calories in solid food. This theory was born out by researchers at Purdue University who, in 2000, gave 15 volunteers 450 calories a day of either soda or jelly beans for a month and then switched them for the next month, while monitoring their total calories. The candy eaters compensated for the extra calories by eating less food and maintained their weight; during the soda phase, the volunteers ate more and gained (MSN Health) There is good evidence that cola beverages can increase the risk of kidney problems, more so than non-cola sodas. Researches clearly demonstrated that large quantities of cola result in enhanced kidney stone formation16-17. If youre wondering exactly how soft drinks cause kidney stones, its because of their acidity and radical mineral imbalances. Your body must buffer the acidity of soft drinks with calcium from your own bones. As this calcium is eliminated through your urine, it slowly forms kidney stones. In a study published in the journal Epidemiology14, the team compared the dietary habits of 465 people with chronic kidney disease and 467 healthy people. After controlling for various factors, the team found that drinking two or more colas a day (whether artificially sweetened or regular) was linked to a twofold risk of chronic kidney disease. 7Increased Blood Pressure Experts have reasons to believe that overconsumption of fructose, particularly in the form of soft drinks, leads to an increase in blood pressure22. 8Likely To Cause Heartburn Soft drink consumption is a strong predictor of heartburn20-21. 9Metabolic Syndrome Risk Factor Soft drink consumption is a significant risk factor for developing of metabolic syndrome18, a combination of the symptoms such as high blood pressure, obesity, high cholesterol, and insulin resistance. 10Harmful Effects On Liver There is evidence that consumption of too many soft drinks puts you under increased risk for liver cirrhosis similar to what chronic alcoholics have19. 11Impaired Digestive System Soda, no matter who makes it, is the most acidic beverage you can buy, with a pH of about 2. 51, about the same as vinegar, but the sugar content disguises the acidity. To put that into perspective, consider that battery acid has a pH of 1 and pure water has a pH level of 7. Interesting fact:  A pH below 4 or above 10 will kill most fish and very few animals can tolerate waters with a pH below 3 or above 11. Why does that matter? Throughout the digestive system, that starts from the mouth and ends up at the anus only the stomach can resist an acidic environment up to pH 2. 0. But before the acidity of soft drink reaches the stomach it passes through all the other organs involved in the digestive system thus causing an abnormal acidic environment. The linings of the mouth, pharynx and esophagus are highly sensitive to acids. The phosphoric acid present in soft drink competes with the hydrochloric acid of the stomach and affects its functions. When the stomach becomes ineffective, food remains undigested causing indigestion, gassiness or bloating (swelling of stomach). 12Dehydration Another problem with sodas is that they act as dehydrating diuretics. Both caffeine and sugar cause dehydration. Caffeine is a diuretic and causes an increase in urine volume. High concentration of sugar is drawing off water because your kidneys try to expel the excess sugar out of the blood. When you drink a caffeinated soda to quench your thirst, you will actually become thirstier. 13High Caffeine Content Another advantage of avoiding sodas is that you will avoid the unnecessary caffeine. Soda drinks are a major source of caffeine in the American diet. High doses of caffeine can cause irritability, restlessness, tension, insomnia, high blood pressure, gastrointestinal disturbance, excessive urination, irregular heartbeat and other side effects. 14Toxins Aspartame If you think diet soda is better think again. The poison in diet soda is an artificial sweetener aspartame. Aspartame is made up of three chemicals: aspartic acid, phenylalanine, and methanol. It is used because its about 200 times sweeter than table sugar. Despite US FDA approval as a safe food additive, aspartame is one of the most dangerous substances added to foods. After you drink an aspartame-sweetened product, aspartame breaks down into its starting components: phenylalanine, aspartic acid, and methanol (that further converts to formaldehyde and formic acid, which are known carcinogens. . There are over 92 different health side effects associated with aspartame consumption10-13. 15Possible Cell Damage Ability A new health scare erupted over soft drinks recently amid evidence that they may cause serious cell damage. Research  from a British university suggests a common preservative E211, known as sodium benzoate, found in drinks such as Fanta and Pepsi Max has the ability to switch off vital parts of DNA. Sodium benzoate occurs in small amounts naturally in berries, but is used in large quantities to prevent mould in soft drinks. 6There Are So Many Healthy Alternatives! [pic] Soda replaces healthier drinks. By drinking soda, you cut the intake of fresh juices, milk, and even water and deprive yourself from essential vitamins and minerals. Water. Water is the best drink in the world. Tea. Any kind of tea herbal, green or black is rich in antioxidants, which were shown to protects the body form many health problems. 100% Juice. Fruit juice can be also useful for flavoring your water and teas.

Ethnic Polarization and the Duration of Civil War

Ethnic Polarization and the Duration of Civil War Introduction The article discusses the relationship between the civil war duration and ethnic polarization. The arguments in the article provide that civil wars are key barriers to the development of the economy. Civil wars lead to the destruction of infrastructure, loss of human life and have an effect on future prospects for investment.Advertising We will write a custom essay sample on Ethnic Polarization and the Duration of Civil War specifically for you for only $16.05 $11/page Learn More The causes of civil wars can be analyzed in relation to their onsets, the duration of the wars, as well as the incidence of civil wars. Civil wars may start randomly, after which conflicts emerge. Factors such as a country having mountains where rebels can hide also contribute to the onset of civil wars. Civil wars may also emanate from low per capita income; this makes a civil war last longer than it would have lasted if the per capita income was high. Lack of democrac y may also trigger a civil war as rebels form militia groups in order to oust an undemocratic regime (Montalvo Reynal-Querol 123-143). Literature Review The available literature indicates that certain factors can be attributed to the onset of civil wars. One of the methods used in the estimation of the civil war onset includes logic regression, which analyses some of the causes as high population, with high primary commodity exports, as well as a population that is highly dispersed. Inequalities in incomes, ethnic differences and political liberties may not be significant risk factors for civil war. The available literature also indicates another probable causes of civil war which is oil exports in a country. An analysis on the incidence of civil war shows ethnic polarization as one of the factors affecting the incidence of such wars (Montalvo Reynal-Querol 123-143). Analysis by Montalvo and Reynal-Qureol shows that democracy and export have little impact on civil wars. In terms o f duration of civil wars, Gates and Strand estimate that major factors influencing this issue are political instability, parallel conflicts and autocratic regimes. Studies also indicate that income inequality can be regarded as a main cause of civil wars (Montalvo Reynal-Querol 123-143). Method/Methodology Certain methods can be used to explain the relationship that exists between civil wars incidence and ethnic polarization. One method, which can be utilized, is the traditional ration form, which defines a quadratic based cost function, contest success function, as well as pure contest equilibrium.Advertising Looking for essay on ethnicity studies? Let's see if we can help you! Get your first paper with 15% OFF Learn More Another model that can be employed to establish relationship between conflict and ethnic polarization, is taking a country that consists of two social groups. This model shows that the discovery of a natural resource may trigger violence b etween the two groups. The methodology used to establish the relationship between civil wars and ethnic polarization is also based on measuring the duration in relation to years, months, weeks, as well as days (Montalvo Reynal-Querol 123-143). Methods such as Kaplan-Meier estimation of the survival function can be used to establish the relationship existing between ethnic polarization and duration of civil wars. Based on this method, survival function of countries that have low ethnic polarization tends to be dominated by nations with high ethnic polarization (Montalvo Reynal-Querol 123-143). Results As indicated in the results provided in the article, ethnic polarization has a profound impact on civil war duration. More pronounced ethnic polarization indicates that the civil wars will last longer than expected. Therefore, ethnic disparities within a population may cause civil wars that may even last for decades. Attention should be directed at polarized countries in order to come up with measures, which will ensure civil wars do not take a toll on the population (Montalvo Reynal-Querol 123-143). Montalvo, Jose Marta Reynal-Querol. Ethnic polarization and the duration of civil wars. Econ Gov 11 (2010):123–143. Print.

JetBlue Case Study Example | Topics and Well Written Essays - 1000 words

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Not ablicable Essay Example | Topics and Well Written Essays - 2500 words

Not ablicable - Essay Example This not only increases the temperature on earth’s surface but also the temperature prevailing over the oceanic region of the world. This remarkable rise of temperature is on account of pollution occurring all over the world. The polluted atmospheric condition over the earth is capable to develop infrared radiation. The main gases present in the earth’s atmosphere are water content, Ozone, Carbon dioxide, Nitrous oxide and methane. These gases are termed as Green House Gases and have certain roles to increase the temperature on Earth’s crust. The industrial transformations and development have increased the production of greenhouse gases in the atmospheric air and is considered as one of the main reasons for the global warming. This phenomenon has observed from the middle of the twentieth century. The concentration of the gaseous media of the atmospheric air has great influence to increase global warming. This is affected in accordance with two principles. One is by the direct emission of infra red radiation from the gaseous constituents of atmospheric air and the other is indirectly through clouds. The solid and liquid particles present in the atmospheric air are responsible for the indirect process to develop the global temperature. These solid and liquid suspensions present in the atmospheric air are generally termed as ‘aerosols’. They are universally originated gases substances and the carriers of these substances to the atmosphere are wind. During their travel with wind the aerosol substances undergo tremendous chemical and physical changes naturally. The characteristic features such as Physical, Chemical and concentration of aerosols present in atmospheric air are also taken in to consideration while thinking about the indirect influence on global warming. The risk management Cycle The risk management cycle points out the volume of risk factor caused due to the nuclear emission occurred from the nuclear power plant