Friday, December 27, 2019
The Rise Of Mass Culture - 2019 Words
Mass culture can be defined as the collective culture created by exposure to the same news sources, music, literature, art and consumer advertising. The rise of mass culture is a relatively new phenomenon that has occurred largely because of the rise of a leisure class fueled by technological innovations, the surplus in production brought about by the industrial revolution and the time the average consumer had to dedicate to non-work pursuits brought about by the delineated work schedule favored by mass production and labor laws which defined the limits of the production schedule, and created a new space for workers and their families. Prior to the advent of mass culture, ââ¬Å"high cultureâ⬠was defined by the elite classed made up of landed and hereditary wealth which defined the proper forms of cultural expression and used control of the access to this culture to define in-group identification and signal cultural cues which were to be picked up and mimicked by the lower cla sses. The monopoly on cultural expression changed with the advent of the mass production of goods which were made affordable by the sheer scale of their manufacture and the necessity to create awareness of this production surplus means of communication on a scale heretofore unseen in human history. The rise of mass culture was also made possible by the urbanization of societies as nations transitioned from predominantly agrarian societies to ones based on manufacturing and service. ThisShow MoreRelatedThe Rise Of Mass Culture1896 Words à |à 8 Pages The rise of mass culture in the United States is a relatively recent phenomenon related to industrialization, changes to the government of businesses, changed the structure of society, and the development of consumer culture. Defining mass culture, however, is far from straightforward. In large part, it may be understood as arising from the culmination of ideas and experiences shared by large numbers of people. Sources that contribute to mass culture include newspapers, works of literature, musicRead MoreThe Birth of Mass Culture: The Rise of the Radio in the 1920s1888 Words à |à 8 PagesThroughout the 1920ââ¬â¢s, a new era of pop culture was ushered in as America recovered from its involvement in the First World War. Within this era, society was dominated by the desire to express oneself and live lavishly while free of structural constraint, and this new pursuit of freedom was displayed within the evolution of jazz, flapper fashions, and an increased obsession with entertai nment. While each of these events undoubtedly played a role in shaping the pop culture of the twenties, one particularRead More Consumer Culture Essay830 Words à |à 4 Pagesconsumer culture?â⬠In the late 19th, early 20th century a new phenomenon arose. Along with the development of industrial advances and urbanization of the emerging American culture was the growth and subsequent domination of the ââ¬Å"consumer cultureâ⬠. Consumer culture is a term that goes hand and hand with the American way of life today, but in those days it was a new and unique experience. Along with the development of the mail order catalog, advertising became a focal point of American mass mediaRead MoreThe And Dissemination Of Cultural Values, Ideologies, And Hierarchies832 Words à |à 4 Pagescultural values, ideologies, and hierarchies is as varied as the historian. Again semantics and semiotics, important issues to understand the full web of the ââ¬Å"word-conceptâ⬠culture, dominate much of the theory and practice. The most common debates are over naming eras and redefining terms like popular, culture, popular culture, etc. Despite the debate, the historiography maintains four i mportant foci for the construction of cultural values: industrialization and the Progressive Era, the influenceRead MoreMedia and Mass Communications Development on a Healthy Mature Culture1200 Words à |à 5 PagesMedia and Mass Communications development on a Healthy Mature Culture This argumentative essay is specially made to discuss the possibility for media and mass communication to nurture the development of a healthy, mature culture. Overall, the process of media and mass communication media development has already caused changes in the public sphere. The digitalization of media dramatically increases the chances of the people to get an access to the information, which is transferredRead MoreThe Rise of Consumer Culture Essay1687 Words à |à 7 PagesConsumer culture has developed over the years for many different reasons such as the demise of the social class and embourgeoisement which are both key factors in capitalism and has therefore led to the argument that consumer society merely reflects the rise of capitalism which I plan to discuss within this assignment. The origins of consumer culture have been discussed by Grant McCracken (1998) who argues that there is minimal agreement in regards to the origins of consumer society. McCracken tookRead MoreT he Popularization Of Technology : The Development Of Urbanization And Urbanization1063 Words à |à 5 Pagespresents and can result in the elimination of languages and their cultures. The uprise of technology is causing the eradication of cultures. The history of cultural assimilation is vast. The Industrial Revolution, from the late 18th century to the early 19th century, brought important inventions including the steam engine, sewing machine, steam locomotives and boats, electric motor, and the factory system.These inventions and the rise of urbanization attracted people to the United States. This createdRead MoreMass Media And Its Effects On Society1633 Words à |à 7 PagesEssay While there have been ideas and mass media in which we have access to, there is small changes in which The United States as a whole has been affected. There have been many discussions on how social media has played a part on American culture as we are becoming more reliant on computers and technology as well as we have in communicating. Social media and mass media has an affect modern society as technology has grown, so will its effects on people. Mass media and social media are, one socialRead MoreHannah Hoch and James Rosenquist --Insiders and Outsiders of Consumerism and Gender 1551 Words à |à 7 PagesWith the rise of industrialization, globalization, and mass production, the manufacturing productivity has been dramatically increased and accordingly the availability of consumer goods. And with the rise of the mass media, various products have been targeted on broad groups of consumers. Consumerism, which is propelled by a system of mass production and high levels of consumption, has been one of the themes in art works from twentieth century till now. In regard to consumerism and genderRead MoreMass Media and Violenceà ´s Effect on Teenagers1252 Words à |à 5 Pagesisnââ¬â¢t popular culture to be violent, violence is certainly a by-product of popular games, mainstream music and other types of media. Teenagers are one of the major groups targeted by mass-media, more specifically video game companies, moviemakers and television programs. They are old enough to understand double innuendos and underlying concepts yet young enough to appreciate animated and younger films. This makes them a prime audience for most media outlets. (Thesis Statement) Mass-media outlets
Thursday, December 19, 2019
Economic Factors Of The Canada Adopt Market Oriented...
Economic Factors The Economic policy of the Government- Canada adopt market-oriented economic policies which clearly indicates that there are free flow and competitive market this results that there is no major impact of policies. Instead of low productivity growth Canada gets 10th rank in terms of GDP and also ranks 21st in terms of purchasing power parity (international monetary fund There is light labor market regulation and it is also flexible and there are skill shortages. The economy is dependent on the mainly on the natural resources and service sector. The fall in crude oil price affected GDP. In the budgetary part 2015 it is indicated that government is encouraging investments and supporting research by maintain low tax burden for the commercial and small businesses and funding the research. (budget.gc.ca) So is can be advised that the Canada will be an ideal place for investment for upcoming 4-5 years. Because of low taxes and currently the government is encouraging investments. Thus it can be said that the Canada will the ideal place for doing a business. GDP GDP Growth (Trend) - The economy of Canada shortens by 0.4 % in the last three monthsââ¬â¢ quarter. In the first and second quarter of 2015 it also shortens by 0.2% and 0.1% respectively but at the end of the year, it will able to achieve moderate results. This narrow down in Canadian economy is mainly caused by the decline in crude petroleum output. Since 2009 this is the biggest contraction in theShow MoreRelatedForeign Exchange And Foreign Currency2256 Words à |à 10 Pagesframes the monetary policy to maintain a desirable Foreign exchange rate regulate the flow of foreign currency in an economy. Now let us understand the correlation interplay between foreign currency the various economic parameters. In a floating regime of exchange rates, the interest rates in the country are adjusted so as to vary its real exchange rates also as a measure to control inflation. Therefore a developing capitalist country will have its Central Bank adopt the policy of keeping itsRead MoreThe Widespread Adoption of Zero and Conservation Tillage Technology in Canada2929 Words à |à 12 PagesINTRODUCTION In Canada, rural population has declined significantly in the last 160 years from about 88% share in 1851 to about 18% share in 2011 (Statistics Canada, 2012). In 2011, the rural population was about 6.3 million which is about 18.8 % of the entire population (33,476,688) at that time. The shift from agriculture to industrialization has been identified as one of the factors contributing to decline in rural population in Canada (Statistics Canada, 2013). The advent of IndustrializationRead MoreThe Impact of World War I on Canadian Economic Development4408 Words à |à 18 Pageslong-term in nature and were most strongly reflected in the form of changing political, economic and social structures, and public opinion across those participant nations or even other parts of the world for decades even after the official end of World War I.1 At the end of the War, changes in political structures were evident in many countries, especially those in Western Europe, as they began to adopt more liberal forms of government. In addition, the optimistic outlook and prosperityRead MoreBenefits Of Foreign Direct Investment2242 Words à |à 9 Pagesfor Nations in Sub-Saharan Africa Executive Summary As developing nations continue to expand their economic systems and find their place within the global market, the practice of Foreign Direct Investment (FDI) has become increasingly common. In 2013, developing nations received nearly 800 billion dollars of FDI, accounting for 54% of total global inflows (UNCTAD 2). Though many have elected to adopt a cautious approach, Foreign Direct Investment has proven to have a multitude of positive effectsRead MoreThe Relationship Between North American Free Trade Agreement And The European Union s Level Of Integration3824 Words à |à 16 PagesQ1. Examine the various types of regional economic integration. What are the differences between the North American Free Trade Agreement (NAFTA) and the European Unionââ¬â¢s level of integration?(2 pages maximum) Regional economic integration represents agreements between countries in a geographic region to reduce tariff and non-tariff barriers to the free flow of goods, services and factors of production between each other. Neighboring countries tend to ally because of their proximity to one anotherRead MoreManaging Out: the Public Sector in the Community Essay2672 Words à |à 11 Pages|Identify the key factors that have produced a greater | | |emphasis on building relationships within, between and | | |outside government agencies in the Australian public | | |sector. From the factors you have identifiedRead MoreCase Study, Chapter 5, Principles of Marketing by Philip Kotlar and Others2355 Words à |à 10 PagesCase study on Consumer Markets and Consumer Buyer Behavior of Harley-Davidson Motorcycles [pic] Prepared for Course No: ETHM-4007 Course Title: Marketing Fundamentals. Course Teacher: Kamrul Hassan Prepared by â⬠¢ MD. SHAHADAT HOSSAIN MOJUMDER o ID- 71209001 EMBA Department of Tourism and Hospitality Management Faculty of Business Studies University of Dhaka Objective.1. DEFINERead MoreEgyptââ¬â¢s Accounting Standards (Eas) Against Ifrs the Reason Behind Compliance and the Main Differences4499 Words à |à 18 Pagessection, the factors that forced the IASC to be restructured to IASB ââ¬Å"International Accounting Standards Boardâ⬠. Moreover, and after correspondence and deliberations, the Securities Exchange Commission (SEC) endorsement on the IFRS. 1.2 IASC Foundation and Launching: Following World War II, each country had its own Generally Accepted Accounting Principles (GAAP, the U.S. designation), or proper accounting practice. Even among the GAAPs in countries with active equity capital markets on which listedRead MoreMasters Of Business Administration ( International Business )2194 Words à |à 9 Pagesof the world markets. This is an attempt to provide an apple to apples scenario for business leaders in transactions. Recent events give ample prove that the world is connected by so many invisible strands of thread that carry waves of occurrences from points of origins to locations unrelated to a projects expected or unexpected results. Recent examples that come to mind are the effects of the terrorist attacks on America on September 11, 2001 and how it has changed foreign policy for the entireRead Moreunemployment Insurance policy2255 Words à |à 10 Pagesï » ¿UNEMPLOYMENT INSURANCE POLICY (prepared by Tadey Tarimo) Unemployment occurs in many forms and it has been a crucial problem countryside and whole over the world. These have become an issue to majority of Tanzanian and many people around the globe, the situation has forced various countries to either formulate or adopt some policies to rectify the issue. The magnitude of the issue has practically depicted in the research conducted in 2012 by African Economic Outlook in Tanzania, the study which
Wednesday, December 11, 2019
Study of the Effect of Lead free essay sample
Controlled and uncontrolled disposal Of waste, accidental and process spillage, mining and smelting of metallurgists ores, sewage sludge application to agricultural soils are responsible for the migration of contaminants into non- intimidated sites as dust or lactate and contribute towards contamination of our ecosystem. The present study was undertaken to study the effect of heavy metals on the growth of Barbaric jounce and thereby its utilization for phototypesetting. The minimum amount of lead (0 MGM/GM) was found in plant treated in O % concentration of lead acetate and maximum amount of lead (0. 001 1 MGM/GM) was found in plant treated in (0. 6%) concentration of lead acetate. The percentage germination for control, 0. 2, 0. 4, 0. 6 percent lead acetate treated seedling was 89%, 88%, 86. 66% and 83% respectively. The length of shoot was found much less in plant treated in 0. 6% concentration of lead acetate (10 CM), as compared to the length of shoot in plant treated with 0% concentration of lead acetate (8 CM).Length of roots was found maximum in 0. 6% concentration of lead acetate (2 CM), as compared to the length of shoot in plant treated with 0% concentration of lead acetate (0. 5 CM). It was found that Brasilia jounce tolerated highest concentration of heavy metals and can accumulate lead. Key Words: lactate, heavy metals, lead, phototypesetting, Barbaric jounce. Introduction Heavy metal contamination of soil, water and air has caused serious environmental hazard in the biosphere due to rapid industrialization and arbitration.Lead is probably one of the most frequently encountered heavy metals in polluted environment. The primary sources of this metal include mining and smelting of metallurgists ores, burning of leaded gasoline, disposal Of municipal sewage and industrial wastes enriched in lead as well as using of lead-based paint (Cabala-Pending and Pending 1984; Seaward and Richard-son 1990). Relatively high levels of lead concentrations were recorded s high as 7,000 pig/ GM in roadside soil (Cabala-Pending and Pending 1984) and 13,380 pig/GM in mining district soil (Wick land 1990).In recent years it has been reported that some plant species known as hyper accumulator derived from heavy metal-contaminated areas have the ability to accumulate unusually high content of heavy metals without dramatically being impacted in their growth and development. (Reeves, Brooks and Malaises 1 985; Baker and Brooks 1989). This raises the suggestion that these hyper accumulators may provide the basis for phototypesetting of heavy metal-contaminated sites (Baker et al. 991 Phototypesetting potential off few such species for heavy metal-contaminated soil and water has recently been detected (Brown et al. 994; Kumar et al. 1995; Duskiness teal. 1995; Hang et al. 1997; Playback et al. 1997). Lead as a Heavy metal: Lead (BP) exists naturally in many forms throughout the world has a soil retention time of 150-5000 yr. Lead is among those heavy metals which have no known biological function. Never the less, numerous investigations show that plants can accumulate lead via root and shoot, and that the lead concentrations in plant tissues are significantly related to the lead levels in environment (Cabala-Pending and Pending 1984; Knows et al. 1 995; Sadism et al 1 995; Going 1998).Excessive lead accumulated in plant tissue can be toxic to most plants, leading to decrease in seed germination, root elongation and biomass, inhibition of chlorophyll biosynthesize, as well as cell disturbance and chromosome lesion (Blabbers Paulson 1989; Kumar et al. 1991; Farragoes 1 994; Going chic). In lead and other heavy metal-contaminated sites, the vegetation structure and biodiversity are usually reduced barren patches of soil occurring and trees are sparse or absent (Wickedly 1990). Material and Method Barbaric jounce seeds obtained from nursery were treated with lead acetate solution of concentrations ranging from 0. %, 0. 2%, 0. 4% 0. 6% for control the seed were soaked in distilled water. After 24 hrs the seeds were transferred on wet filter paper (wet by the solutions of respective con. ) in plastic trays. Seedlings were harvested after .NET days, the germination rate and the length of root and shoot was recorded. The amount of lead accumulated in the seedlings was also calculated. Stock solution of 0. 2%, 0. 4% and 0. 6 % was prepared in the following way: 20 MGM of lead acetate in 000 ml distilled water in volumetric flask gave 0. % of lead acetate solution. In the same way 40 MGM 60 MGM lead acetate salt were dissolved to prepare 0. 4% 0. 6%. Stock solutions respectively. The DNA in control and the treated seedlings was estimated by Deployment reaction. Optical density was read at 595 NM on a photoelectric colorimeter. Standard graph of O. D. On Y-axis and concentration of standard DNA on X-axis was plotted. DNA from sample was estimated with the help of standard graph. The Folio Lowry method of protein assay was used for protein estimation in control and treated dwellings.Optical density was read at 625 NM on photoelectric colorimeter. For the estimation of lead from the treated seedlings, 10 GM of the plant material was crushed in mortar and pestle in 40 ml distilled water and the solution was filtered. Another series was made by taking 10 ml sample solution from filtrate of all concentrations from 0. 2%, 0. 4%, 0. 6% and control. 25 ml of freshly prepared Ammonium solution and 0. 5 ml of Sodium sulfide solution was added to all the above test tubes. Similarly for standard graph, varying concentration (0. 25 1. Ml) of working lead solution was prepared.To this 25 ml of freshly prepared Ammonium solution to make it alkaline was added; also 0. 5 ml of Sodium Sulfide was added. The volume of all solutions was equalized with distilled water. A blank was also prepared in the same manner without adding lead solution. Optical density was read at 430 NM on photoelectric colorimeter. The concentration of lead was calculated in terms of MGM/liter from standard graph. Result Discussion The minimum amount of DNA (4. 350 MGM/GM) was found in seedlings treated in (0%) concentration of lead acetate after 20 days of treatment, and maximum minimum amount of DNA (4. 5 MGM/GM) found in plant treated in (0. 6%) concentration of lead acetate after 20 days of treatment. The graph shows that the amount of DNA increases as the concentration of lead acetate goes on increasing. The minimum amount of Protein (86 MGM/GM) was found in plant treated in (0%) concentration of lead acetate after 20 days of treatment, and maximum amount Protein (93. 5 MGM/GM) found in plant treated in (0. 6%) concentration of lead acetate after 20 days of treatment 89. OMG and 91. OMG of protein was estimated in the seedlings treated with 0. 4% and 0. 6% lead acetate.From the graph it can be concluded that the mount of protein Increased with the increase in the concentration of lead. The graphical representation was done for calculating the concentration of lead in the treated seedlings. The optical density was read at 430 NM for control, 0. 2%, 0. 4% and 0. 6% lead acetate treated seedlings was O, 0. 013, 0. 016 and 0. 019 respectively. The graph plotted resulted into a straight line, indicating the increased accumulation of lead in the seedlings. The concentration of lead was calculated using graph. In leg of control, 0. 2, 0. And 0. 6 percent lead acetate treated seedling sample had O MGM, 0. 00078 MGM, . 00094 MGM and 0. 001 1 MGM of lead respectively. The minimum amount of lead (O MGM/GM) was found in plant treated in (0%) concentration of lead acetate and maximum amount of lead (0. 0011 MGM/GM) was found in plant treated in (0. 6%) concentration of lead acetate. This suggests that Barbaric jounce could accumulate comparatively high doses lead. The percentage germination for 1 GM each of control, 0. 2, 0. 4, 0. 6 percent lead acetate treated seedling was 89%, 88%, 86. 66% and 83% respectively.The germination with increase in concentration Of lead acetate did not show any inhibitory effect on the orientation of seeds but a steady decrease in the percentage of germination was observed. Maximum percentage of germination was found in control seeds. Out of 300 seeds soaked in 0. 2%, 0. 4% and 0. 6% solution of lead acetate showed 264, 260 and 249 seeds germinating respectively. When compared to the control the germination percentage of the treated seeds did not differ much. This indicated the capability of Barbaric jounce in tolerating the presence of heavy metals like lead.The shoot length for 1 GM each of control, 0. 2, 0. 4 and 0. 6 percent lead acetate treated seedling was 8 CM, 8. 5 CM, 8. CM, and 10 CM respectively; also the root length for 1 GM each of control, 0. 2, 0. 4 and 0. 6 percent lead acetate treated seedling was 0. 5 CM, 0. 8 CM, 1. 0 CM and 2. 0 CM respectively. The length of shoot was found maximum in plant treated in 0. 6% concentration of lead acetate (10 CM), as compared to the length of shoot in plant treated with 0% concentration of lead acetate (8 CM). Length of roots was found maximum in 0. % concentration of lead acetate (2 CM), as compared to the length of shoot in plant treated with 0% concentration of lead acetate (0. 5 CM). This indicates that Barbaric jounce was blew to utilize the increased amount of lead to its advantage, suggesting the use of Barbaric jounce as a natural alternative for phototypesetting. Conclusion The present study indicates that plant species like Barbaric jounce can tolerate wide range of heavy metals concentration, it utilizes the heavy concentration for its all round growth . It can be used in removal of lead; and hence its use in phototypesetting in future.Phototypesetting is a fast developing field, since last ten years lot of field application were initiated all over the world, it includes Phototypesetting of Organic, Inorganic and Radio slides. This sustainable and inexpensive process is fast emerging as a viable alternative to conventional remediation methods and will be most suitable for a developing country like India. Most of the studies have been done in developed countries and knowledge of suitable plants is particularly limited in India. In India commercial application of Phototypesetting of Soil heavy metal or Organic compounds is in its earliest phase.
Wednesday, December 4, 2019
Physics Practical; Comparing and improving two rainfall gauge experiments Essay Example Essay Example
Physics Practical; Comparing and improving two rainfall gauge experiments Essay Example Paper Physics Practical; Comparing and improving two rainfall gauge experiments Essay Introduction The aim of this experiment is to test and improve an existing rainfall measuring experiment using a potential divider. I have done this by modifying the equipment I use; this has given me a better resolution and more linear results. Apparatus For the first unimproved experiment 5 volt Dc power supply Physics Practical; Comparing and improving two rainfall gauge experiments Essay Body Paragraphs Rotary potentiometer Float Voltmeter Beaker Metal rods Blue tack Clamp stand Ruler For the second experiment; 5 volt DC power supply Rotary potentiometer Clamp stand Arm with joint Volt meter Beaker Float Ruler Safety If the water is spilt then it must be mopped up. The beaker might break if it falls on the floor therefore all equipment must be kept away from the edge of the table. The rotary potential divider must be secured in a clamp stand. This must be held tightly so that it will not fall on the table as this would damage both he table and the rotary potential divider. Diagram of Experiment 1 Diagram of Experiment 2 Theory A rotary potentiometer has a primary use in fuel gauges in cars however it is also useful in rain detectors or robot arm sensors. It works because, when a 5 volt current is passed through the two potential divider connections and the rotary arm if fully opened up the full current will pass through. However if the arm closes slightly a different output voltage is given. Therefore to measure an amount of liquid in and area the voltage is measured by a voltmeter. The voltmeter must be set across the rotary potentiometer to gain clear results. Method For the first experiment, the rotary potentiometer was connected to the power supply. After this, I connected a voltmeter to measure the voltage across the rotary potentiometer. The rotary potentiometer is then firmly attached to a clamp and stand so as not to fall out on to the table. Then I fixed a metal rod to a right angle of the potential divider from the moving spindle at the centre of the rotary potentiometer, as this moved the out put voltage changed. From this right-angled rod, another rod was attached at an angle of 90à ¯Ã ¿Ã ½ downwards. The rods where joined together by blue tack. This downwards rod was connected to a float, which was a ping-pong ball. Assembled it is the immersed into a beaker where the water was added and the out put voltage is to be measured. Fo r the second experiment, I did the same this made my experiment fair. However, I altered the arm, this enabled the arm to rotate more smoothly also I used a larger container for the experiment. Therefore, the float would not constantly hit the sides. In addition, I used a polystyrene float this floated better than a ping-pong ball. All output voltage will be measured in à ¯Ã ¿Ã ½m on the voltmeter. Also not only as I add a set increasing ml of water must I measure the output voltage I must measure how much the water level for each addition of 100ml of water has increased. Once I have this result I can calculate the average resolution for my sensor Problems For the second experiment there where minimal errors, due to the fact the aim of the second experiment was to eliminate errors from the first experiment. For the first experiment, the beaker was the wrong shape for the task. This meant that as the arm was elevated when the water started to fill the beaker the float encountered the sides and therefore giving anomalous results. To stop this from happening in the second experiment I used a larger beaker. This stopped the arm and float from hitting the side. The change in beaker shape would have affected the results for the two experiments; therefore, I used a beaker that gave enough clearance however, it was very similar to the first beaker this meant my results would not be affected by a large amount. I measured this out put voltage difference between the two beakers and compensated for it in the results from my second experiment therefore giving accurate results. Also in the first experiment the rods where joined by using two rods at 90à ¯Ã ¿Ã ½ through the rotary potentiometers spindle. Alternatively, though this measured the level of water accurately, it gave no give in the joint between the two arms, this allowed the float to hit the sides and give me anomalous results. To stop this from happening in the second experiment I used an arm that had been professionally made this meant that it gave accurate results because it would be at a constant angle of 70à ¯Ã ¿Ã ½, and did not twist or hit the side. The two arms where attached between the 70à ¯Ã ¿Ã ½ angle with two plastic disks these where on a pivot to allow the arms freedom to move from left to right of each other however it would not spin in the opposite direction. This spin would give the anomalous results. For the first experiment, the ping-pong ball also caused problems. When water was added to the container the ball did not rise this was because it had holes in the surface and therefore filled with water. To stop this occurring I changed the ball. In the second experiment, I changed the ball to a polystyrene ball, I did this because polystyrene floats better than a PVC ball, and this gave my results for the second experiment an extra degree of accuracy. The second experiment also had fewer problems as it was an improved experiment. At first when I set, the second e xperiment up the potential divider was faulty therefore; I had to change this for a different rotary potential divider. In addition, my first selected beaker for the second experiment also made the float hit the side and gave me faulty readings this meant I had to change for a slightly larger beaker. Results Results for the first unmodified experiment; voltage output/à ¯Ã ¿Ã ½m (+/-0.001V) Rainfall/ml v-out v-out v-out Average output 0 119.5 135.6 124.2 126.4 400 115.2 110.6 120.5 115.4 500 105.6 95.6 103.0 101.4 600 78.0 85.4 83.2 82.2 700 56.2 54.2 51.3 53.9 800 28.1 34.2 31.9 31.3 900 7.9 6.2 9.7 7.9 1000 2.0 0.5 1.1 1.2 Resolution 3mm Results for the second (modified) experiment; voltage output/à ¯Ã ¿Ã ½m (+/-0.001V) Rainfall/ml v-out v-out v-out v-out v-out Average output 0 129.4 130.0 132.0 130.8 130.3 130.0 400 117.9 121.7 122.0 120.5 119.6 120.0 500 115.3 110.7 111.9 113.2 114.3 113.4 600 82.5 83.1 81.9 83.1 83.0 82.5 700 60.0 57.5 58.6 59.7 60.7 59.6 800 30.1 29.7 32. 1 30.22 27.9 30.8 900 10.5 8.9 9.5 9.6 10.1 9.8 1000 0.9 1.01 0.8 1.03 1.01 1.01 Resolution 2.5mmThese results provide me with the evidence I need to compose graphs and to draw a conclusion. Analysis of my results The second experiment also had fewer errors as it was an improved experiment. At first when I set, the second experiment up the potential divider was faulty therefore; I had to change this for a different rotary potential divider. In addition, my first selected beaker for the second experiment also made the float hit the side and gave me faulty readings this meant I had to change for a slightly larger beaker and recalculate the difference in volt output per measure meant taken. The resolution of the second experiment was around about 3mm this was adequate for measuring rainwater as it normal rains more than 3mm in 1 day. However, I increased the resolution of the rainfall detector by 0.5mm. This shows that these small changes have improved my experiment. The graph for the first experiment is linear, despite this there are some anomalous results for example 900mm, which gave an average volt output, of 0.00079v. This could have been down to a number factor such as parallax error of measuring the water level or taking the reading during a fluctuation of the voltmeter. The results for my second experiment are obviously more accurate when plotted on a graph. This is because on the first graph there are five results that do not fit onto the trend line, however my improved experiments graphical results show that the results are more closely suited to a linear trend line. This is because of the improvements in equipment that was used also more accuracy which means less parallax error. Parallax error is human error of measurement. Evaluation The aim of the experiment was to improve an existing experiment to measure the rainfall by using a rotary potentiometer. The results that I have collected and displayed on the graph show that I have increased the accuracy of the results. The new results form an increased correlation on a trend line. In addition, the resolution of my experiment has increased by 0.5mm of water this is very impressive as I thought at the start of this experiment that the resolution would of remained the same. Also if this was to be made into a really rain measuring gauge it would be easier to keep outside and not have to monitor constantly. This is because of the alterations I have made. Before if the first experiment were left for 24 hours the float would have hit the side if it floated at all, and there would have had to be 3mm of rain for a clear reading to be taken. With the improved experiment, it could now be left outside, because the new arm joint allows the arm movement and to measure at a constant angle however, it will not hit the side of the beaker, only 2.5mm of rain would have to fall for a reading to be taken and the ball is assured to float. If I was to improve the experiment further, I would use a resis tance box, and a power supply that gave a constant 5 volts instead of a power supply that gave a fluctuating 5 volts, I would also use a more sensitive voltmeter. A resistance box would not increase the resolution however; it would increase the strength of the signal to the voltmeter and therefore giving a better reading. If I were to use a fixed 5 volt, power supply it would give me a constant 5 volts instead of fluctuating around 5 volts this would also improve my voltmeter readings and linearity of my graph. If I was to use a more sensitive voltmeter I could increase the accuracy of my results by 1 decimal place this although would not improve my results it would make them easier to anomalies and then I would be able to find a more affective way of stopping the anomalous results. We will write a custom essay sample on Physics Practical; Comparing and improving two rainfall gauge experiments Essay Example specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Physics Practical; Comparing and improving two rainfall gauge experiments Essay Example specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Physics Practical; Comparing and improving two rainfall gauge experiments Essay Example specifically for you FOR ONLY $16.38 $13.9/page Hire Writer
Subscribe to:
Comments (Atom)