Tuesday, November 26, 2019
Battery essays
Battery essays A current is produced basically by the flow of electrons. The dry cell, or Leclanche battery works by creating two electrochemically different ends (an anode and a cathode) so current passes through when a complete circuit is connected. This involves non-renewable compounds which initiate reactions at both ends of the cell. These reactions allow the flow of ions which ultimately produce the current. Diagram 1: The make-up of a dry cell Diagram 1 shows the composition of the cell initially. As the cell is used zinc ions are formed and ammonium ions are discharged. The zinc reaction occurs at the anode: Zn _ Zn2+ + 2e- While at the cathode: NH4+ + MnO2 + H2O + e- _ Mn(OH)3 + NH3 The reduction of Manganese from 4+ to 3+ produces a voltage of about 1.5V. The dry cell is the cheapest commercially available battery. Depending on the relative size, each battery can be worth less than $3. In our fast paced modern world of electricity and communication the dry cell battery is widely used in items such as torches, walkmans and other music players, calculators, clocks and toys. It is an essential part of our society as the TV could not be changed without these batteries. However there is not a great amount of voltage produced so it can only run smaller items for variable periods of time. As the first commercial battery there was a huge impact on society. It allowed the production and development of the above items, which could now be made portable. It also pioneered the development of other batteries to be more powerful and longer lasting. There is little negative environmental impact through this small cell. It is easily produced, there are no implications of use and storage. In disposal the manganese (III) is oxidized to insoluble manganese (IV), and the small amounts of zinc, ammonium salts and carbon ...
Friday, November 22, 2019
The History and Archaeology of Chauvet Cave
The History and Archaeology of Chauvet Cave Chauvet Cave (also known asà Chauvet-Pont dArc) is currently the oldest known rock art site in the world, apparently dating to the Aurignacian period in France, about 30,000-32,000 years ago. The cave is located in the Pont-dArc Valley of Ardà ¨che, France, at the entrance of the Ardà ¨che gorges between the Cevennes and Rhone valleys. It extends horizontally for nearly 500 meters (~1,650 feet) into the earth and consists of two main rooms separated by a narrow hallway. Paintings at Chauvet Cave Over 420 paintings have been documented in the cave, including numerous realistic animals (reindeer, horses, aurochs, rhinoceros, bison, lions, cave bears among others), human handprints, and abstract dot paintings. The paintings in the front hall are primarily red, created with the liberal applications of red ochre, while the ones in the back hall are mainly black designs, drawn with charcoal. The paintings at Chauvet are highly realistic, which is unusual for this period in Paleolithic rock art. In one famous panel (a little bit is shown above) an entire pride of lions is illustrated, and the feeling of movement and power of the animals is tangible even in photographs of the cave taken in poor light and at low resolution. Archaeological Investigation The preservation in the cave is remarkable. Archaeological material in Chauvet caves deposits include thousands of animal bones, including the bones of at least 190 cave bears (Ursus spelaeus). The remains of hearths, an ivory spearhead, and a human footprint have all been identified within the caves deposits. Chauvet Cave was discovered in 1994 by Jean-Marie Chauvet; the relatively recent discovery of this remarkably intact cave painting site has allowed researchers to closely control the excavations using modern methods. In addition, the researchers have worked to protect the site and its contents. Since 1996, the site has been under investigation by an international team led by Jean Clottes, combining geology, hydrology, paleontology, and conservation studies; and, since that time, it has been closed to the public, to preserve its fragile beauty. Dating Chauvet The dating of Chauvet cave is based on 46 AMS radiocarbon dates taken on tiny pieces of paint from the walls, conventional radiocarbon dates on human and animal bone, and Uranium/Thorium dates on speleotherms (stalagmites). The deep age of the paintings and their realism has led in some circles to a scholarly revision of the notion of paleolithic cave art styles: since radiocarbon dates are a more recent technology than the bulk of cave art studies, codified cave art styles are based on stylistic changes. Using this measure, Chauvets art is closer to Solutrean or Magdalenian in age, at least 10,000 years later than the dates suggest. Paul Pettitt has questioned the dates, arguing that the radiocarbon dates within the cave are earlier than the paintings themselves, which he believes are Gravettian in style and date to no earlier than about 27,000 years ago. Additional radiocarbon dating of the cave bear population continues to support the original date of the cave: the bone dates all fall between 37,000 and 29,000 years old. Further, samples from a nearby cave support the idea that cave bears may have been extinct in the region by 29,000 years ago. That would mean that the paintings, which include cave bears, must be at least 29,000 years old. One possible explanation for the stylistic sophistication of Chauvets paintings is that perhaps there was another entrance to the cave, that allowed later artists access to the cave walls. A study of the geomorphology of the cave vicinity published in 2012 (Sadier and colleagues 2012), argues that the cliff overhanging the cave collapsed repeatedly beginning 29,000 years ago, and sealed the only entrance at least 21,000 years ago. No other cave access point has ever been identified, and given the morphology of the cave, none is likely to be found. These findings do not resolve the Aurignacian/Gravettian debate, although even at 21,000 years of age, Chauvet cave remains the oldest known cave painting site. Werner Herzog and Chauvet Cave In late 2010, film director Werner Herzog presented a documentary film of Chauvet Cave, shot in three-dimensions, at the Toronto film festival. The film, Cave of the Forgotten Dreams, premiered in limited movie houses in the United States on April 29, 2011. Sources Abadà a OM, and Morales MRG. 2007.à Thinking about style in the post-stylistic era: reconstructing the stylistic context of Chauvet.à Oxford Journal of Archaeologyà 26(2):109-125. Bahn PG. 1995. New developments in Pleistocene art.à Evolutionary Anthropologyà 4(6):204-215. Bocherens H, Drucker DG, Billiou D,à Genesteà J-M, and van der Plicht J. 2006.à Bears and humans in Chauvet Cave (Vallon-Pont-dArc, Ardà ¨che, France): Insights from stable isotopes and radiocarbon dating of bone collagen.à Journal of Human Evolutionà 50(3):370-376. Bon C, Berthonaud V, Fosse P, Gà ©ly B, Maksud F, Vitalis R, Philippe M, van der Plicht J, and Elalouf J-M.à Low Regional Diversity Of Late Cave Bears Mitochondrialà à Journal of Archaeological Scienceà In Press, Accepted Manuscript.Dnaà At The Time Of Chauvet Aurignacian Paintings. Chauvet J-M, Deschamps EB, and Hillaire C. 1996. Chauvet Cave: The worlds oldest paintings, dating from around 31,000 BC.à Minervaà 7(4):17-22. Clottes J, and Lewis-Williams D. 1996. Upper Palaeolithic cave art: French and South African collaboration.à Cambridge Archaeological Journalà 6(1):137-163. Feruglio V. 2006à De la faune au bestiaire - La grotte Chauvet-Pont-dArc, aux origines de lart parià ©tal palà ©olithique.à Comptes Rendus Palevolà 5(1-2):213-222. Genty D, Ghaleb B, Plagnes V, Causse C, Valladas H, Blamart D, Massault M, Geneste J-M, and Clottes J. 2004.à Datations U/Th (TIMS) et 14C (AMS) des stalagmites de la grotte Chauvet (Ardà ¨che, France) : intà ©rà ªt pour la chronologie des à ©và ©nements naturels et anthropiques de la grotte.à Comptes Rendus Palevolà 3(8):629-642. Marshall M. 2011.à Bear DNA hints at age of Chauvet cave art.à The New Scientistà 210(2809):10-10. Sadierà B, Delannoy JJ, Benedetti L, Bourlà ©s DL, Stà ©phane J,à Genesteà J-M, Lebatard A-E, and Arnold M. 2012. Further constraints on the Chauvet cave artwork elaboration. Proceedings of the National Academy of Sciences Early edition. Pettitt P. 2008.à Art and the Middle-to-Upper Paleolithic transition in Europe: Comments on the archaeological arguments for an early Upper Paleolithic antiquity of the Grotte Chauvet art.à Journal of Human Evolutionà 55(5):908-917. Sadierà B, Delannoy JJ, Benedetti L, Bourlà ©s DL, Stà ©phane J,à Genesteà J-M, Lebatard A-E, and Arnold M. 2012.à Further constraints on the Chauvet cave artwork elaboration.à Proceedings of the National Academy of Sciencesà Early edition.
Thursday, November 21, 2019
Maltreatment and the Developing Child Essay Example | Topics and Well Written Essays - 1500 words
Maltreatment and the Developing Child - Essay Example The caregiversââ¬â¢ (mostly, the parents) role therefore is crucial to the development of the child. Without proper care and attention, the child would likely suffer from malnourishment, emotional and mental maladjustment issues. Based on these considerations, this paper shall now discuss the possible impact of extreme deprivation and neglect on the development of a child. It shall use examples of cases and case studies in order to enhance knowledge on this issue. The nature and the nurture debate have set forth the importance of both genetics and experience in the development of our brain. In generally accepted terms, medical specialists emphasize that nature or genes are responsible for the basic wiring plan, the formation of the cells, and the connections between the different brain regions (Oliver, 2007). Our experiences (nurture) are responsible ââ¬Å"for fine-tuning those connections, helping each child adapt to the particular environment (culture, family, peer group) to which he or she belongsâ⬠(Oliver, 2007, p. 1). Even as the cells of our brain are already developed and we cannot do anything about how they are developed, the environment still has an influence on the development of the brain. Based on years of research on neuroscience, an infantââ¬â¢s experience usually has a permanent impact on the wirings of the brain (Eliot, as cited by Oliver, 2007). Upon a childââ¬â¢s birth and subsequent development and growth, his brain cells are fired and wired together. In the process, cells that are highly active are preserved and strengthened, and other cells or synapses which are not active are pruned away (Oliver, 2007). A childââ¬â¢s brain therefore requires constant stimulation in order to develop its full potential. ââ¬Å"Their best learning is from being highly attuned to human stimuli ââ¬â interacting with your face, voice, and touch. Singing, talking, and reading to
Tuesday, November 19, 2019
Performance management Dissertation Example | Topics and Well Written Essays - 1000 words
Performance management - Dissertation Example The project aims to bring forth how performance management has evolved as a necessary tool in improving and enhancing productivity of employees in organizations. The organization chosen for the study is Saudi Telecom Company.Saudi Arabia has demonstrated rapid demographic changes which accounts as its main determinant of political and economic stability. In particular, it is the ability of a nation to develop its human resources that determines the success of its organizations in the long run. The main purpose of the study is to show that employee performance in Saudi Telecom has increased and has improved by the implementation of its system of performance management. Saudi Arabia represents the largest proportion of nationals in the nationââ¬â¢s labor force. The presence of a huge proportion of the population in the labour force of Saudi Arabia is one major reason for organisations to practice and implement performance management (Looney, 1991). Saudi Telecom Company is considere d to be the leading national provider of telecommunication services in Saudi Arabia. Established in the year 1998, the company has gradually transformed its business from that of a government system to a recognised commercial business. The companyââ¬â¢s clear emphasis on strategies focuses on reorganisation and the development and re-skilling of its staff and the development of processes to cater to meeting its customer needs and requirements (Saudi Telecom Company, 2011). ... The company also enables managers from other organisations to take part in the program for developing and improving their own performance (South Texas College, 2006, p.26). The present research seeks to understand the effectiveness of the system on the performance of employees and the organisation. The performance would be evaluated in the areas of human resources, financial issues, management and leaderships, organisation behaviour, communication and personal development. Research Question The research question for the study has been provided below. To what extent has the performance of employees improved in Saudi Telecom Company by implementation of the system of performance management? There is a positive relationship between performance and productivity of employees in organizations. The answer to this question would reveal the extent to which this purpose can be fulfilled. It would also throw light on the fact that business goals and objectives can be met through the implementat ion of proper performance management plans. Moreover, the answer would help the organization to plan its system of performance appraisal. The result of the study would help to identify areas which need to be addressed due to poor performance and also the areas of good performance which need to be improved. The results would also help to recognize and reward the performance of employees (Kota, n.d., p.16). Research Aims and Objectives The research paper would deal with the impact of performance management in the performance of employees in Saudi Telecom. In this regard, it would present different aspects of performance management and the way it influences performance of individuals. Based on the research question that
Saturday, November 16, 2019
Analysis of Scene 2 of Blue Remembered Hills Essay Example for Free
Analysis of Scene 2 of Blue Remembered Hills Essay In scene 2, the audience can see a slight change of pace. This is shown through the lack of physical violence in this scene in comparison to the previous scene 1. The pace starts off as fidgety as the two seven year old boys-Peter and Willie- can barely keep still but the pace hardly reaches any faster than this through the rest of the scene. The point in which they are both laughing and giggling uncontrollably is the only real point where the pace picks up a bit. This is when the boys are both laughing about Wallace peeing on a gorse bush due to the fact that he thought it was on fire. The subject of Wallace visibly fastens the pace, as is evidence in many other scenes. I think the slow pace of this scene shows the actual weakness of these two boys as their dilemmas and problems at their age are partially revealed through their banter and conversation. The seemingly raw subject of Donald and the beatings he receives at home seem to strike a misunderstood chord with the two boys but they shrug off the confusion and potential sadness and envelope themselves into another situation. This awkwardness is shown in the stage directions alone as they fall silent and the tension that they do not understand is quickly broken by more childishness, and they quickly run themselves into another less sensitive subject. The moments where there is quite a fast pace in this scene is only created by the characters purposely after they are bored and have nothing else to do or interesting to say. The subject of Donald is quickly followed by a purpose running about and swooping around by the two boys to bring up the energy levels. The back and forth conversation about the Dandy and Beano gets quite tedious for Peter and he quickly is distracted by something else more active and exciting. The characters in this scene are still both Willie and Peter and the relationship between the boys familiarly stays the same. In the previous scene, the audience saw that Peter was dominant in the relationship and frequently craved control of it and of Willie, often with physical violence but in this scene, he no longer results to this and uses his words more to cajole Willie into telling him where the jam jars are. Willie also still seems to have the upper hand in the argument though as he knows all the information Peter wants to get. Because of this, Peter has to still be moderately controlled in how he acts towards Willie to get the location of the jam jars out of him. This unexpected control Willie has is evident as when Peter once again threatens Willie with physical violence-his fist- he sees that this may completely blow his chance of getting any information so he rethinks and offers him his Dandy. Willie is now in control as he shows to Peter that he doesnt care and that he could buy his own comic. This under-valued control that Willie has is still present in scene 2 and similarly continues on in the play. Concluding, there is small change of pace and characters in Scene 2 but not on a large scale. The pace is slowed down visibly from Scene 1 as there is not as much playing about and fighting between the two characters. Apart from the stage directions in Scene 1 where it clearly stated if they were moving and what actions they were doing if they were talking, this was no stated in Scene 2, therefore, I have no choice but to assume most if their conversation was given mostly in stationary mode. There was no real change in characters in Scene 2 other than the fact that In scene 1, Peter was triumphant in his method of physical beating to get Willie to give him the apple and in scene 2, Willie was triumphant in his knowledge of information to keep a secret the information about the jam jars but that was only really successful because of the distraction of the squirrel.
Thursday, November 14, 2019
Hershey :: essays research papers
Milton Hershey was born in Derry Church, Pennsylvania in 1857. He was raised on a farm and never got passed the fourth grade. When he was eighteen his parents sent him to live with a chocolate maker so that he would learn the trait. After several failures, he founded his first successful business, the Lancaster Caramel Company. The Lancaster Caramel Company was doing so well that Hershey decided to open another Company to manufacture the chocolate. Hershey grew more wealthy and powerful; he opened the new chocolate factory in the town in which he was born. The town thrived on the factory because of the new jobs it created and Hershey donated money for schools and parks. Because of what he did for the town the community was renamed Hershey. Hershey died in 1945 at the old age of eighty-eight. The Hershey Food Corporation was still young and had not branched out into other products besides chocolate. One of the original products was the Hershey kiss. Later to come were produces such as Mr. Goodbar 1925, Hersheyââ¬â¢s syrup 1926, chocolate chips 1928, and the Krackel bar 1938. The Reeces Company started out as a separate organization but because they were so similar the Reeces Company merged with the Hershey Food Corporation. The production of the new food products helped people deal with the great depression by creating more jobs. During World War II the Hershey Food Corporation produced a field ration bar. Some Hershey factories were even used to build parts for weapons that the military would use in the war. Just recently the Hershey Food Corporation has expanded its products. Hersheyââ¬â¢s now own the rights to Twizzlers licorice, Ronzoni Foods, Rowntree, and Y&S candies. Hershey Foods Corporation currently has 14,000 full-time employees throughout the worldwide offices and factories. The current President, and Chief Executive Officer is Richard H. Lenny and the Senior Vice President is Marcella K. Arline. Last year Hershey Foods Corporation earned $4.2 billion in Sales. The Hershey's corporate headquarters is located 100 Crystal A Drive, Hershey, PA 17033 the town where it all began.
Monday, November 11, 2019
Problems that sikhs face practicing their religion in Britain today Essay
Sikhism was born in the Punjab area of Asia which falls into present day states as India and Pakistan the main religions of that time were Hinduism and Islam. The Sikh faith began around 500 years ago (1500 CE) when Guru Nanak started preaching a faith that was quite distinct from Hinduism and Islam. Nine gurus followed Guru Nanak and developed faith over the next centuries. Sikhism is the youngest of the six world faiths and is the second smallest of all. Sikhism was formed from Hinduism and Islam. Sikhs follow the teachings of the 10 Gurus, The Gurus (meaning religious leader) are not worshipped. Their teachings are recorded in the Guru Granth Sahib, the Sikh holy book. The 2001 census recorded 336,000 Sikhs living in Britain. Britain is becoming more and more multicultural and there are more Sikhs now than ever before. As Britain is predominantly Christian, many Sikhs face difficulties in practising their faith. Like some other religions, Sikhs are often discriminated against in Britain today. The war on Iraq brings with it an increase in hostility towards those who wear turbans making it hard for some Sikhs to show pride in their religious clothing. The turban has become an important symbol of the Sikh faith. Most Sikh men wear a turban as well as some Sikh women. Sikhs may experience slurs, isolation, hostility and sometimes even assaults just because of their appearance. Many British people are racists and are unable to accept anybody who are of a different race, this must make it very hard for Sikhs to feel normal and at ease in the place that they live. Some Sikh traditions include not cutting your hair and using tobacco. Sikhs donââ¬â¢t cut their hair because they believe God created you with hair so that is the way he must want you to look. In Britain some people may associate very long with being dirty and/or untidy, and this could also lead to more discrimination against the Sikhs. Male Sikhs wear turbans to cover their hair which can cause problems with certain types of jobs. Due to health and safety you have to wear a helmet/hard hat on a construction/building site. If youââ¬â¢re a Sikh, you are not allowed to take off your turban and the helmet wonââ¬â¢t fit over the top of it therefore any strict Sikhs will not become builders or anything associated with construction/building sites. In older times bus conductors were made to wear caps whilst working. Men with turbans were not able to wear this hat so they were not allowed to become bus conductors. Officers in the police force are also required to wear a cap/hat whilst working. Sikhs have been turned down due to refusing to take off their turbans so that they can work as a police officer. The UK Police have spent one hundred thousand pounds trying to adapt a hat that will fit over the Sikh turban. Until then Sikhs are not allowed to join the force unless they are willing to take off their turbans. Schools in Britain teach very little on Sikhism today. The ââ¬Ënetwork of Sikh orginisationsââ¬â¢ expressed the views of the Sikh community that teaching of Sikhism is being pushed out even in schools where the majority of the population are Sikhs. Apart from a handful of schools there is little provision for pupils to undertake any qualifications in Sikh religious studies. There are many sport professions that Sikhs are unable to take part in such as swimming and football. As a lot of Britain are sport fanatics this must be hard for Sikhs as they cannot take part in any of it. The law has been lifted against helmets for Sikh motorcyclists, so that they can now ride bikes with just a turban on. Many Sikhs are vegetarians. This could be quite difficult in certain situations such as children in school or certain restaurants. Those who are not vegetarians will only eat meat where the animal has been killed in a certain way, unless the Sikhs know that the animal was killed correctly then they will not eat the meat. Eating in restaurants would be tricky because theyââ¬â¢re unlikely to have killed their meat in the way Sikhs require. Sikh men and women who are full members of their religion (Khalsa) wear the five Kââ¬â¢s. These represent the five articles of faith which distinguish individuals as Sikhs. The five Kââ¬â¢s described under Khalsa are KESH, KANGHA, KARA, KIRPAN and KACHERA. The Khalsa was a brotherhood of fighters who would dedicate themselves to the Sikh cause and were given certain distinctive features to identify them as Sikhs. There are five of these features, which Khalsa Sikhs wear today. They are: KESH OR KESHAS: long hair usually worn under the turban to symbolise holiness. KANGA: small wooden comb to keep the hair tidy and symbolise purity. KARA: steel bracelet/bangle worn on the right wrist to protect the sword arm and symbolises eternity. KIRPAN: a small sword symbolising readiness to fight oppression. KACHA or KACHERA: shorts worn as an under garment, to symbolise modesty and sexual restraint. In Britain it is illegal to carry the kirpan identical to the original in public as it is seen as dangerous. However the ââ¬Ëcriminal justice actââ¬â¢ (1996) allows anyone to carry a blade exceeding the length of 3 inches for religious, cultural or work related reasons. The 2003 discrimination act safeguards the Sikhs to carry a kirpan. Some Sikhs wear a necklace that contains charms of the kanga and kirpan so that they do not look threatening. There is a case of a girl from South Wales who was suspended from school for refusing to remove her Kara. The school claimed that her bracelet was against school rules which were set a long time ago. The girl refused to take off her kara as she was proud to wear it because it reflected which religion she was part of. The school was taken to court over the suspension and was declared guilty of indirect discrimination. Sikh temples are known as Gurdwaras. There are not many Gurdwaras in Britain where Sikhs can go to worship. This is a difficulty for the Sikhs to practice their faith as in India part of a Sikhs ritual would include attending the Gurdwara. Religious festivals such as maghi and diwali may not be attented by certain Sikhs due to work. Some jobs may not offer them the time off as Britain is more Christianity orientated with time off for Christmas and easter etc. In Conclusion I think that being a Sikh in Britain must be difficult and hard to practice and will take some getting used to. Those who were born in Britain will not know any different anyway so they will be well adapted to the way in which they live. I think it is probably very hard for those who have emigrated from Asia to adapt to a new way of living.
Saturday, November 9, 2019
Priyagold History Essay
After the research objectives have been specified (step 1) and the list of needed information has been prepared (step 2), the researcher should determine whether such information is already available, either in company records or in outside sources, certainly, the researcher should not collect data from the field until the appropriate secondary sources of information have been reviewed. If the needed information is not available from secondary sources, the researcher will have to collect data in the field, and so it will be necessary to design a data collection project. Researcher encounter many possible sources of error when designing a data collection project. Some of these include using a poor or inappropriate research design not using experimental designs where possible); using a large scale study instead of a small scale study, or vice versa; using poor experimental designs; and still others. To minimize the possible sources of error associated with designing a data collection project, the following five issues must be given attention first To a great extent, this issue is likely to be determining by the research objective and the situation leading to the request for research. Exploratory research is likely to be used when investigating a potential opportunity or problem and conclusive research is likely to be used when the research is likely to be used when the research findings are expected to result in specific decision being made or specific actions being taken.
Thursday, November 7, 2019
The Legal Issues Report essays
The Legal Issues Report essays One of the most pressing legal issues that the Florida School for the Deaf and the Blind is facing is issues pertaining to employee hiring, firing and management. Within this area of employment law, the Florida School for the Deaf and the Blind has faced several discrimination claims filed against them by employees. The majority of these discrimination claims were based on a claim that an employment decision was based on the employees disability. Because the Florida School for the Deaf and the Blind is a publicly funded entity, it is considered a body of the government and is thus held to a specific standard for determining whether or not they acted in a discriminatory fashion. The Florida School for the Deaf and the Blind claims that they had an important need for the so-called discrimination in that the employees disabilities prevented them from being able to carry out the important functions required of working with a deaf and blind population. For example, Kevin Nealey, a dormitory instructor, claimed that he was demoted to the status of a part-time employee because of his disability. Nealey is blind and was told he could no longer perform his job due to his blindness. Nealey claims he is able to perform all the required functions of the job. The Florida School for the Deaf and the Blind states that a dormitory employee requires the greatest monitoring of children at all times. The Americans with Disabilities Act covers entities, including private employer, against qualified individuals with a disability. A qualified individual is an individual with a disability who, with or without reasonable accommodation, can perform the essential functions of the employment position that such individual holds or desires. A disability is defines as 1) a physical or mental impairment that substantially limits one or more of the major life activities of such individual; 2) a record of such impairment; or 3) being regar...
Tuesday, November 5, 2019
Acids and Bases - Calculating pH of a Strong Base
Acids and Bases - Calculating pH of a Strong Base KOH is an example of a strong base, which means it dissociates into its ions in aqueous solution. Although the pH of KOH or potassium hydroxide is extremely high (usually ranging from 10 to 13 in typical solutions), the exact value depends on the concentration of this strong base in water. So, its important to know how to perform the pH calculation. Strong Base pH Question What is the pH of a 0.05 M solution of Potassium Hydroxide? Solution Potassium Hydroxide or KOH, is a strong base and will dissociate completely in water to K and OH-. For every mole of KOH, there will be 1 mole of OH-, so the concentration of OH- will be the same as the concentration of KOH. Therefore, [OH-] 0.05 M. Since the concentration of OH- is known, the pOH value is more useful. pOH is calculated by the formula pOH - log [OH-] Enter the concentration found before pOH - log (0.05)pOH -(-1.3)pOH 1.3 The value for pH is needed and the relationship between pH and pOH is given by pH pOH 14 pH 14 - pOHpH 14 - 1.3pH 12.7 Answer The pH of a 0.05 M solution of Potassium Hydroxide is 12.7.
Saturday, November 2, 2019
Trade Pattern between developed(the U.S.) and developing(South Korea) Term Paper
Trade Pattern between developed(the U.S.) and developing(South Korea) countries - Term Paper Example Even though the U. S has a trade discrepancy with South Korea, it has had a reliable trade surplus of approximately $2 billion to $3 billion in agricultural goods (Carbaugh 213)1. South Korea is the tenth greatest economy in the globe, with a yearly annual GDP fast approaching one trillion US dollars (Todaro 314)2. While it was the seventh biggest export market for the US in 2004, U. S was South Koreaââ¬â¢s third largest trading partner and the second largest export market in 2005. In addition, South Korea is the fifth biggest market for the U.S agricultural export and the United States provides more than one fifth of South Koreaââ¬â¢s agricultural imports. This paper looks at the characteristics of the United States-South Korea bilateral trade and offers an overview of the tariff reduction as well as elimination schedules of the two countries (Eckes 311)3. Characteristics The main mode of the US-South Korea mutual trade has moved from inter-industry trade to intra-industry tra de. Specifically, the trade model was interââ¬âindustry trade on the foundation of divergence in resource donations before 1994. The US exported intensive and natural resource-founded industry goods and technology, as well as capital-concentrated products to South Korea and imported labor-concentrated goods from that nation (Buckley et al. 341)4. Nevertheless, intra-industry trade between the two nations has increased notably in the high technology product sector since 1995. A key rise in trade of high-technology goods between the two nations shows the surge in bilateral intra-industry trade founded on good differentiation. The two nations have also raised their bilateral trade in differentiation mid-technology goods. Comparisons between trade volume and trade surpluses, by sector, can offer insight on bilateral trade patterns between the two nations. In this paper, US-Korea bilateral trade is looked at in six sectors. Agriculture and food, natural resource based industries, tex tiles, mid technology goods, high-technology goods among others. The sectors are determined on the basis of standard international trade classification two-digit code. The agric-food sector includes primary agricultural goods and processed food (Lo?pez 648)5. The natural sector comprises of gas, coal, wood and petroleum products among others. The mid section comprises of fertilizers, chemical materials, non-ferrous metals as well as furniture. The high-tech section has machinery, scientific instruments and transport instruments. The others comprise of the transaction services. The US has trade surpluses and South Korea is in the food and agriculture sector, and until lately, the natural resource-based industries. The US has a trade deficit and South Korea in the high technology section, which has grown with time. The US also has a trade shortage with South Korea in the textile section; however this deficit has declined with time. Indeed, both US imports and exports of textile produc ts have declined ever since 1990, owing to the third country impact in the market. Since other nations like Thailand, China, Indonesia, as well as Latin American nations have become very competitive in the manufacture of textile products, both the US and South Korea have raised their imports of these commodities from these nations. For the middle-technology section,
Subscribe to:
Comments (Atom)