Resistance of a wire coursework Essay Example for Free

Resistance of a wire coursework Essay Then we measured the first measurement of resistance at 100a c, increasing the temperature too over 300a c. Taking s measurement at every 10a c. At one point in the investigation the heat started to melt the plastic coating around the wires, we quickly noticed this was a problem so we attached the wire to a clamp, this was to stop the bare wire touching the metal sand tray, as this would cause the resistance in the metal of the tray to be measured as well, this would cause the ammeter to short circuit. After collecting results, we plotted a scatter graph, drawing a line of best fit, we also indicated any anomalies. I took the photo myself Safety When doing our investigation we had to take into consideration the safety aspect, this is because we were using very high temperatures up to 300a c. We used safety goggles to protect our eyes from the heat, and in case of spitting from the water in the preliminary work, to the sand in the main experiment. We also kept or distance from the experiment to protect from heat and spitting just like the goggles. After we’d finished we left the equipment to cool before the technicians to clear away, with a safety sign. We also used heatproof mats so the worktop was protected, as well as this it protected glass or porcelain pieces of equipment from thermo-shock (high to low temperature, very quickly) http://www. amazing1. com/Graphics/oly-lsg-4-1. jpg Obtaining Evidence Before we began our real experiment we carried out preliminary work to find out what was the best was to test the resistance of a wire, or how we could. So we tried using temperature as something that would either increase of decrease the resistance. In our preliminary work we found that the resistance started to change when the temperature exceeded 90a c. However we found that this was a problem because we were using water to heat the coiled wire. Waters boiling point is 100a c so we had to discard the idea and change it. So we used a sand tray as sand has a much higher melting point then water. We also repeated many of the experiments as well as the preliminary work to find out whether or not this was just a case of human error, and that we didn’t need to change the experiment. Also in the temperature experiment we used Copper at first; we then used Nichrome as this has a much higher resistance so the results would not be as high. In my results we identified outliers, and also calculated a mean, or the average for all of the results for the change in length of wire/thickness. In the first experiments for length of wire we didn’t specify a length of time that we were going to measure resistance on the wire for, we just laid the wire on the other wire, however this would have heated the wire giving us less accurate results. I decided to change this by only touching the wire for 2 seconds at every 10cm, allowing enough time to obtain results, but not long enough for the wire to be heated. http://reprap. org/mediawiki/images/9/99/Blunt_step10. jpg Patterns In Results In our results there were many patterns shown, for example as the length of wire increased in the length/ width experiment so did the Resistance of the wire. As well as this as the temperature increased further and further, the resistance of the wire increased as well. These patterns both show that our predictions were correct. However in both of these experiments’ there were a few anomalies. For example lengths 130cm on 28 gauge wire, and 150cm on 36 gauge wire. In the temperature test, temp 140a c and 250a c were anomalies. Conclusion My results show that as the length and the thickness of the wire increased, so did the resistance, which supports what my prediction. This is shown because when the length of wire was 40cm long (28 gauge) the resistance average was 2. 9 ohms, at 100cm the resistance average was 5. 4 ohms and finally at 160cm the resistance average was 7. 9 ohms. This is then supported by the 36 gauge wire, at 40cm the resistance was 9. 2 ohms, at 100cm the resistance was 19. 2 ohms and at 160cm the resistance was 27. 7. This clearly shows that there is an increase in resistance when there is an increase in length. In the temperature experiment my results show that as the temperature increased so did the resistance of the wire, however there were a few anomalies in the experiment. At 100a c the resistance was 1. 5, as the temperature increased to 220a c the resistance was 3, however at 240a c the resistance was 2. 9, this shows an anomaly in the results. After the temperature increase again so did the resistance e.g. at 300a c the resistance was 3. 6 Overall I think that my conclusion supports what I wrote in my prediction. This is because I predicted that as the length/temperature was increased so would the resistance of the wire. My experiments were a success. However if I were to do this again I would repeat each of the experiments more times to eradicate any anomalies that may have occurred through the investigation. Evaluation I think that my investigation went well, this is because my results that I have gathered support what i wrote in my prediction. However they were a few problems in the experiment for example, when we increased the temperature one of the connecting wire began to melt, this was due to the wire been too close to the Bunsen’s flame. This made our experiment short circuit, meaning we had to start the investigation from scratch. Also in our length experiment the wire began to heat higher than we wanted because of the current in the circuit, this could have made our results less accurate. Although the wire may have heated more than we wanted I still believe that the results were very accurate, as we only had 4 outliers in all of our results. I think that the level of accuracy in my results is very high because we repeated each one of the experiments more than once. To increase the level of accuracy in the results I think that if I were to repeat the investigation I would repeat them more than just once; this allows you to eliminate any anomalies that occurred. There were a few anomalies in my experiment these were: 1. 130cm on 28 gauge wire 2. 150cm on 36 gauge wire 3. In the temperature test, temp 140a c and 250a c were anomalies I think the anomalies for the length experiment will have occurred because of human error e. g. not reading the results correctly, or touching the two wires together for too much time, this would cause the wire to heat up, causing a false reading of the resistance. In the temperature experiment, I think the anomalies may have also sprung from the connecting wire becoming too hot, meaning that the resistance would not have been the right reading. As well as this, if the connecting wires touched the side of the sand tray, this would cause the reading to be lower so this may have occurred at some point during the experiment. In the investigation we repeated some of the experiments more than once; this allowed me to make my results more reliable. Also it allowed us to eliminate anomalies. I think that I should have taken more results because I still have anomalies in my results. However I did check if my results were correct by repeating each of the experiments more than once. When I did repeat the experiments the results I got were identical apart from the anomalies which some of them did not occur more than once. This proves that by repeating them it reduced the number of mistakes made. I also think that the range of results I collected was sufficient to give me answers for my prediction and conclusion. If I had to use my results to as evidence to back up my conclusion then I would be very confident. This is because my evidence supported my prediction, and all of the evidence was clear and easy to show in many different ways, whether in a table, bar/line graph or in any other form of data representation. I believe that I could use my results as evidence because it clear, concise and is very easy to understand. Thing that I could do to improve my investigation would be to make sure that there was only one variable (one thing I was changing) and to ensure that all aspects of human error were eliminated before starting the experiments. One further experiment that I would do would be to use a wider range of material for the coil of wire to give me more evidence, such as how the material changes the resistance. Show preview only The above preview is unformatted text This student written piece of work is one of many that can be found in our GCSE Electricity and Magnetism section.

American Racism Exposed in Poems by Langston Hughes and Sherman Alexie

American Racism Exposed in Langston Hughes' "Let America Be America Again" and Sherman Alexie's, "Capital Punishment" The issue of racial discrimination has become societal norm in America. Poems like Langston Hughes' "Let America Be America Again" and Sherman Alexie's, "Capital Punishment" show the injustice that still exists. Both poems speak to the prejudice that is accepted and current in America's past and present. Alexie and Hughes, both from minority groups, have seen the ugly face of racism. Both poems have many similarities, including the obvious tone of anger. The pieces also have their differences, while Hughes poem speaks from the viewpoint of one of the oppressed; Alexie's speaker is just a witness. Both writers draw attention to the injustices that minority groups face daily in this land of the free. Sherman Alexie, A Spokane/Coeur d'Alene Indian, grew up on a reservation in Washington yet attended a high school where he was, as he so eloquently said, "the only Indian...except for the school mascot."(Alexie) Even though he was a star basketball player he still faced the torment of his schoolmates due to his heritage. This injustice influenced Alexie to compose the poem, "Capital Punishment." This poem tells the story of an Indian who was sentenced to death, the story is told from the perspective of the cook who prepares his last meal. The line "I am not a witness" is repeated throughout the poem, it is said after Alexie addresses a sensitive societal issue. Topics concentrated on are prejudice, homosexuality and clearly capital punishment. Alexie uses subtleties at first, alliterating to his stance on capital punishment but by the end of the poem the anger and frustration is prevalent. The speaker o... ...ure. Not only does Hughes reject the idea of "the American Dream" he discards the proposal that America is the land of the free. Would America properly function without the oppressed, the people who work 50 hour weeks at minimum wage, the people who created this "America?" Without those people the comfortable lifestyle most of us know would be gone. So, the poor, colored and those of a different nationalities are denied chances to succeed to keep the traditional values. Both poems address the widespread societal issue of racism that is so prevalent in America. Hughes and Alexie seem to agree that judgment of others has been the disgrace of our nation. If the color of a man's skin did not have such a great value in our society maybe then America could be everyone's. Not just the rich white man's but the immigrants, the Africans, the Indians and the poor.

Education is the key to a bright future

â€Å"Education is the key to a bright future†, a statement that my parents have constantly reminded me of and has become a reality. My ambition and determination to succeed in education has prompted me to maneuver through the thickets of financial constrains to which I was predisposed throughout my early schooling life. In many occasions in the course of my education, I have been forced to halt my progress to give my parents an opportunity to gather more resources to push me forward. The hardships I encountered have shaped me into a determined student and consequently, I have engaged in many activities with the aim of ensuring that I cultivate a better life is for myself as well others in society. After completing my high school studies in Russia, the top grades attained gave me an opportunity to access college education, although this leaning stage was not a bed of roses bent on the several challenges encountered. However, my zeal to reach my goals and objectives could not give any room to despondency and hopelessness. Complacency and dwelling in the comfort zone have always been my worst enemies which I have overcome with sober mindedness and hard work. At the time, the course that I decided to study was Japanese and English studies. My choice of course was in line with my bigger vision of studying not only in Russia but also in other countries like U. S and Japan since I believed in looking for higher opportunities which can only come forth with sharpened multi-lingual abilities. It bears mentioning that financial constrains forced me to seek employment especially during the holidays. Luckily I found an opening in a certain tourism agency where I worked as an assistant record keeper, carrying out all the duties assigned diligently and effectively. The money however was inadequate since I only worked for a few hours after school and therefore I had to find some more work to adequately meet my needs. Consequently, I volunteered to teach English language in several high schools from which I earned some more income. This was a greatly supplement to what my parents earned from their cloth selling business. Eventually, my three years in college were complete and wonderful credits could not fail to reflect in my certificates. After graduating from my first college, my parents concurred with me that it was the high time I explored the academic world in a different environment having acquired the great foundation. However, the financial aspect of it had to be addressed quite explicitly to ensure that problems do not crop up in the middle of the journey. My dreams had always been to further my studies in the United States. My parents had to look for all the available means to ensure that my quest for excellence in the world of academia was fulfilled. Eventually they managed to raise funds for my flight and a part of my college tuition fee at Hunter College in New York. The background I had in Russia was of great help in my new environment where most students are English speakers. Therefore, my persistence and ability to make the right choices and appropriate decisions seemed to be paying off as my dreams of studying in America had finally come true. As a Russian transfer student, my English skills facilitated my interaction not only with my fellow college mates but also with the highly qualified teaching staff. I decided to further my studies in English and Japanese translation for which the progress was quite commendable and the grades encouraging. However, my hopes of finishing the second college were overshadowed by severe shortage of finances to cater for tuition and also my upkeep. Despite the wonderful efforts made by my parents and friends to sponsor my studies at Hunter College, there was always a deficit which made me to be in and out of college on several occasions. More often than not, I had to plead with the college administration to allow me stay in class for more days since the amount paid intermittently for my tuition was inadequate to sail me through to the end of each semester. Unfortunately, I could not make it to complete the stipulated three years period of study and therefore had to terminate my studies. However, I have never believed in impossibilities since my optimistic disposition gives no room for hopelessness. I am determined to climb the next available rung in the diverse opportunities in Berkeley College where I intend to study a Bachelors degree in Fashion Marketing and Management. As I have explained, my greatest obstacle has been shortage of funds. Therefore with a scholarship, I am sure I will have the ability to study this business course to its full length. After acquiring this precious knowledge, I intend to help my parents in marketing the various fashions of clothes they deal with and also assist them in expanding their business through good management skills. I also envision establishing my own business empire in the long run.

The Article Gender Role Models - 896 Words

The article Gender Role Models ... who needs ‘em?! By Stephen Hicks encouraged me to reflect on my childhood gender roles as well as how I portray my gender roles today. After learning about the socialization theory I realize my parents were traditional towards gender roles and have incorporated multiple theories of human growth and development into my gender development. I have also learned how my gender roles have gradually transformed since I was a child. Therefore, this article has brought to my attention several feelings and thoughts about my past and how I was raised as well as how my gender roles have changed as I have developed. Throughout my childhood, my mother and father both contributed to my growth and development since birth, this lead me to believe having a mother and a father would lead to the best outcome in life. Socialization theory clearly represents how my family interacted with me when I was a child, for example â€Å"socialization theory suggests that o ne function of the family is to teach children the correct behaviors associated with their gender† (Hick, Pg. 45, 2008). I was continuously exposed to the correct behaviors for my gender and never any different. I was clothed in a gender specific wardrobe and only had the option to play with gender specific toys. My parents also enrolled me in gender specific sports; for example, I took gender specific dance lessons at the age of three. This showed me what was correct for my gender and what I should beShow MoreRelatedGender and Sex Essay963 Words   |  4 PagesWhen considering gender and sex, a layman’s idea of these terms might be very different than a sociologist’s. There is an important distinction: sex, in terms of being â€Å"male† or â€Å"female,† is purely the physical biological characteristic differences – primarily anatomical differences. (There are also rare cases of â€Å"intersexual† individuals as outlined in the Na varro article, â€Å"When Gender Isn’t a Given†.) Gender, on the other hand, is an often misconstrued concept that is commonly mistaken as synonymousRead MoreThe Importance Of Teacher Student Relationships And The Nsw Quality Teaching Model945 Words   |  4 Pageslens of the NSW Quality Teaching Model† article, is a Bachelor of Primary Education (second year), at the University of Wollongong, Australia. When this article was published online in February of 2012, Liberante articulated the effective importance of student-teacher relationship, utilizing the Quality Teaching Model. 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Definition of Gender Roles A gender role consists of characteristics that refer to a set of social and behavioral norms that are widely considered appropriate for either males or females. Gender roles are different throughout society and cultures. One gains gender roles unconsciously, consciously, or genetically due to cultural rules (Princeton). B. How film characters are seen by the audience Many people view women as weak in hopeless and males as strong and heroic in films. MaleRead MoreThe Deinstitutionalization Of Marriage And The Sanctification Of Gendered Marital Roles1316 Words   |  6 PagesCovenant marriage and the sanctification of gendered marital roles. Journal Of Family Issues, 30(2), 147-178. This article contains research on the deinstitutionalization of marriage and the changing gender roles by focusing on a unique group of marriages. The authors use quantitative and qualitative research data from previous studies. The article reveals that covenants are more traditional than standards across religious, marital, and gender attitudes. It discusses covenant-married couples as opposedRead MoreGender Socialization Through Toys and Sports1147 Words   |  5 PagesGender Socialization through Toys and Sports In today’s society, there are many guidelines of how one should act and be. Gender socialization is the process where people take on notions of gender roles, gender ideas and gender behaviours. At an early age, boys and girls are told how to behave and act according to societal norms of gender behaviours and roles. The comparison of Jane Smiley’s article â€Å"You Can Never Have too Many† and John McMurty’s , â€Å"Kill ‘Em! Crush ‘Em! Eat ‘Em Raw!† provides anRead MoreGender Roles Of Society : Analysis Of Emily Martins1185 Words   |  5 PagesGender Roles in Society: Analysis of Emily Martins Essay In her article, Emily Martin discusses how society reshapes natural biological processes based on gender stereotypes. That these stereotypes believe that women’s biological processes are inferior to men and they are overall less worthy. Emily Martins goal in writing this article is to reveal the different gender stereotypes in regards to the scientific language of biology. And in return, she hopes to change the influence they have on the general

12 Career Options for Political Science Majors

Political science majors are popular for a reason: theyre interesting, theyre current, and they open a lot of career opportunities for graduates. Fortunately, political science majors can apply their academic and, often, their political training in a wide range of jobs. 12 Careers for Political Science Majors 1. Work on a political campaign. You majored in political science for a reason. Put your academic interests to the test by working on a political campaign for a candidate youd love to see—and help—make a difference. 2. Work for the federal government. The federal government works in a variety of fields with people of all backgrounds. This offers many opportunities to develop subject matter expertise. Find one branch that interests you the most and see if theyre hiring. 3. Work for the state government. Federal government too big? Give back to your home state, or a new one, by working for the state government. Also, because of federalism, there are certain areas in which states have more control, so some areas of expertise may be a better fit at the state level. 4. Work for the local government. You may want to start off a little smaller and closer to home in your political career. Consider working for the local government, its a great place to get your foot in the door. City and county governments are a good place to start. 5. Work in advocacy for a nonprofit. Nonprofits are often busy working toward their missions—helping kids, fixing the environment, etc.—but they need a lot of help behind the scenes. That includes getting political support for their cause and thats where your degree can help. 6. Work at a politically based website. If you like to write, engage in online discussion, and help create a virtual community, consider working for a politically based website. You could also write for the political section of a website that is broader than politics. 7. Work in government relations in the for-profit sector. Working for a private (or even public) companys government relations department will allow you to blend your interests in politics with the dynamics of working for a specific company. 8. Work in government relations in the nonprofit sector. Interested in government relations but also in helping promote a cause? Many nonprofits, especially larger, national ones, need staff to help with government relations and advocacy. 9. Work for a school. You may not think of working at a school as political in nature, but many institutions—including colleges and universities, as well as K-12 schools—need help with your special skill set. This includes coordinating government relations, advocating for funding, managing regulations, and a whole host of other, interesting responsibilities. 10. Work at a magazine. Many magazines admittedly (or very clearly) have a political tilt. Find one you like and see if theyre hiring. 11. Work for a political party. Consider, for example, checking into whether the Republican or Democratic Party is hiring for its local, state, or national offices. You might surprise yourself with what you end up getting to do! 12. Teach.  Teaching is a great opportunity for the politically minded. You can help inspire a passion for political science and government in your students while also having summers off for your own political work.

Taking a Look at Globalization - 2172 Words

Globalization: Globalization can be seen as reduction in barriers between countries. Globalization has opened the world market for international trade. The movement of globalization have contributed to the spread of knowledge, culture, technology, and information across borders. The increasing role international expansion across border has also increased the focus of multinational corporations to international business strategies. Organizations today in developed nation or in developing nation are going international due to increase in competition. They want to expand their limits beyond local region. Competition in domestic market and pressure to expand the business are the few reasons for the globalization. The following are the few†¦show more content†¦c) Legal Environment: It is important for any multinational corporation to be aware of the law and framework of the country. Multinational corporations should adapt and understand the law and mend their operations according to it. d) Technological Environment: Technology in 21st century is improving every second. The advancement in technology is one of the main reasons for globalization. An organization should analyse the level of technology used by the foreign market. Technology of other nations is important to understand to survive in it. Market entry strategy: Multinational corporations of emerging market are adopting strategy for globalization. It is difficult for any multinational corporation to directly enter any world market because the level of risk involved is very high. There are few entry strategies adopted by many multinational corporations to enter new countries and regions which involve less amount of risk. There are many strategies to enter a foreign market and the following are few important strategies adopted by MNEs of emerging market 1) Exporting: An export is no new word to international trade. Exporting `There are many multinational corporation who is in exporting business since decades. This method is very simple and the level of expense involved is very cheap. One of the best advantage of exporting is it allows the corporation to realize the foreign location and help them to knowShow MoreRelatedThe Cartoonist : A Cartoon From Gibbleguts.com1402 Words   |  6 Pagespeople who protest globalization. In the cartoon, a man is standing and holding a sign that declares, â€Å"STOP GLOBALIZATION NOW!† This man has arrows and words around him indicating where his material possessions were made; his glasses from Singapore, his shirt in China, his shoes in Indonesia, and so on. 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Subsea Well Intervention free essay sample

Subset Well Intervention Services Increasing Operational Efficiency [emailprotected] has a proven record of optimizing intervention efficiency and is dedicated to shifting operators away from heavy well interventions such as coiled tubing (CT) and snubbing towards lighter interventions. While those traditional methods require the use of a derrick, Well [emailprotected] conveyed methods are light weight and efficient in both manipulation and operations due to the hireling solution that enables for more operations to be performed more frequently. Welters Light Well Intervention Services As a part of our continued development to meet the demands for interventions in subset wells, [emailprotected] now includes complete subset intervention services to our existing portfolio. This establishes [emailprotected] as a complete service provider with the ability to provide integrated solutions to the benefit of our clients. As shown below, one of our major clients, Stallholder, has since 1996 implemented a strategy of moving from heavy interventions to light weight tractor related interventions, which has increased their operational scope. One problem the industry faces with subset wells is that recovery factors are much less compared to recovery from platform wells. A major contributing factor is the low frequency of interventions performed on subset wells. Light well interventions are important for subset operators to realize the full potential from their subset fields. These operations are becoming more routine but there are increasing challenges and demands on technology as the water depths increase. To reduce the overall risks, new technology and improved operational efficiency are required to meet the ambitions for light well interventions. 2008 RILL Snubbing/RASA Coiled Tubing 2 3 Deployment Options for Subset Services There are three classes of vessels from which to perform subset intervention work: 1 . Resellers Light Well Intervention (RILL) vessel 2. Heavy intervention vessel with lightweight high pressure riser system 3. Semi-submersible rig hull type Traditionally, expensive semi-submersibles have been used to do interventions and completions in subset wells. With the RILL system, these operations can now be performed from a Light Well Intervention vessel in a more cost and time effective way. This will allow more frequent interventions which will improve recovery factors for subset fields, while also reducing the carbon footprint. [emailprotected] does not provide the vessels but we enable this migration to lighter well interventions by using lighter conveyance and mechanical services to accomplish many of the same tasks that heavy interventions perform. [emailprotected] solutions are mostly electric hireling conveyed which offers many benefits: Faster and more cost efficient operations Surface readout data collection for diagnostics of well conditions Less people on board and less equipment to mobile No surface pumping and fluids handling equipment to deal with Generic Resellers Light Well Intervention vessel 4 5 Demanding Environments ARQ u I r e Rob us t Too Is Welters subset well intervention services are designed to withstand hostile well environments around the world. Operating specifications 25,000 SSI working pressure O 4000 F temperature rating 10,000 Ft water depth* Compatible with horizontal and conventional EXT Variety of hireling operations Technology development plan with the operator Compatible with any length and size of lubricator Typical applications Data gathering (PLOT) Perforating/re-perforation Zone isolation (plug/straddle) Inspection/repair/installation of insert DASH Milling of short call bridges Camera runs: visual or x-ray Scale treatments (IIS) Selective tracer injection or sampling Change-out of gas lift valves Sleeve operations DISCS valves * Interventions at this water depth are possible, but have not yet been achieved 6 7 Integrated Solutions At [emailprotected], we are well recognized as the worlds leading provider of precision robotics. We can now provide the following range of services from our portfolio that can be provided either as a [emailprotected] standalone service or as a part of an alliance: Mechanical hirel ing services (slicking braided line) Fishing operations Plug/packer setting and retrieval E-line services (mono multi conductors) Cased hole logging services Tubing/pipe inspection and repair Perforating Plug/packer setting and retrieval Well [emailprotected] associated services Scale and metal milling Shifting sliding sleeves and valves Sand/debris clean out Production enhancement services Crown plug pulling Downhill snubbing capability Swaging of deformed tubing/pipe Nipple profile milling Fishing with DO snubbing unit Installing and pulling plugs, straddles and patches 8 9 Value Proposition [emailprotected] has a strong interest in minimizing well intervention cost and is working to haft from heavy well intervention operations towards lighter and more efficient methods. While coiled tubing and snubbing require the use of semi submersibles, Well [emailprotected] conveyed subset interventions can be performed from a vessel of opportunity. Our ambition is to reduce operating cost and increase production output by developing and qualifying new technologies for subset wel l intervention operations, which can be run independently to drilling rigs. Apart from reducing intervention costs, we create substantial return on investment (ROI) for our clients by increasing their production, revenue and prolonging the reducing lives of their wells and reservoirs. We provide reliable services that add value to our clients businesses through our field proven cutting edge technologies. Our dedication to certainty of execution and desire to move towards lightweight interventions are particularly important in subset wells where the operational and logistical challenges are higher. As illustrated by the graph below, operators can generate millions of dollars in value creation when applying Welters hireling equipment. We conduct our services with the highest consideration for the environment and trivet to increase our business performance through excellent HOSE awareness. Thus, we are able to mobile for a Job in a matter of hours along with a small crew of experienced field engineers.