Making sense of data Essay Example for Free

Making sense of data Essay This is due to the atoms of the metal gaining kinetic energy. As they move faster they collide with passing electrons, inhibiting their passage. This creates not only resistance, but also more heat as electrons try to get rid of their energy. Considering all factors, I think that the results still clearly portray that there is a positive correlation between the length of wire and resistance. The resistivity of the metal can be calculated by using RL=k Where: R is resistance L is length K is the constant of resistivity (The ability of a metal to conduct). To maximise accuracy, I will use the point closest to the line of best fit to calculate this value. RL=k 200. 7=k 14? m=k This figure is a very rough approximation due to the Inaccuracy of the equipment used. Experiment 2: Cross-sectional Area and Resistance The purpose of this experiment is to prove the relationship between cross-sectional area and resistance. As the cross-sectional area increases, the resistance should decrease. This should happen because there will be more room for the electrons to flow through the metal. There will be fewer collisions, thus less resistance. This experiment was conducted by using multiple strands of wire, side by side. In order to calculate the total cross-sectional area, the number of strands multiplied the cross-sectional area of one strand. Note: Where the AreOhms column says E, this refers to Exp or x10^-4 ect. Cross-Sectional Area (m ) Amps (mA) Volts(V) Ohms(? ) Area(m ) Ohms(? ) Inv 0The cross-sectional area of wire used was 3310 cm, and the length was 1m for every trial. Using data from the above table: Yet again the resistivity can be calculated, this time using the equation: R = ? L A Where: R is resistance ?  m A graph to show the relationship between 1/R and Cross-sectional Area The positive correlation illustrates the proportionality between 1/R and the cross sectional area. The straight line is due to 1/R being the inverse of R. Instead of the resistance decreasing as the area increases on the graph, it makes both axes increase. This makes it easier to extract trends and identify errors. Also the regression of plots can be calculated. The regression of this particular line is 9. 919. This implies that the results plotted are almost perfect, that being 1. This exemplifies that there is definitely a relationship between the cross-sectional area of wire and the resistance. I would imagine that the minute errors are systematic. Small miss-calibrations in the equipment could lead to such errors, and using analogue meters would definitely contribute to this Conclusion In conclusion, both experiments have proven the relationships between the dimensional properties and resistance of wire. In each experiment, the resistivity of the wire was calculated. As it is a constant, it should always be the same for that particular wire. However, the resultant values arent incredibly similar. This may be due to the fact that Nichrome is an impure metal. Composed of both Chrome and Nickel, it may be un-uniformly proportioned, thus giving a different resistance. I would consider the second value to be the most accurate due to the fact that the line of regression on the graph is very close to 1 (perfect). It is very evident that there was a much larger error margin for the first set of results which could also be due to` lack of accuracy when measuring lengths of wire. Calculating is a much more reliable method, as illustrated in the cross-sectional area experiment. If I were to improve the experiment, I would use digital meters, which will have a much higher resolution and accuracy. To further the integrity of my results I would ensure that all measurements are made accurate and exact. As Physics Making Sense of Data Coursework 1 Calvin Stewart 22/04/2002 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.

Affirmative Action: Giving Preferential Admissions to Minority Students

Should universities eliminate affirmative action polices that give preferential treatment in admissions to minority status? â€Å"Anyone interested in higher education should want to contemplate, on behalf of colleges and universities, students and faculty, alumni and paying parents, the fate of affirmative action(Chace, M William 20). The Oxford Dictionary states Affirmative Action is â€Å"an action or policy favoring those who tend to suffer from discrimination, especially in relation to employment or education; positive discrimination.† In 1961, John F. Kennedy signed an Executive Order calling for â€Å"affirmative action to ensure that applicants are employed, and that employees are treated during employment, without regard to their race, creed, color, or national origin.† This is now known today as the Equal Employment Opportunity Commission(EEOC). Affirmative action policies would later be forced upon businesses and have also been instituted at many universities where minorities are given preferred admissions over non-minorities. An Example of this would be at the University of Mic higan where applicants who represented racial or ethnic minorities were given 20 points towards admission out of a 150 point system where only 100 points were needed to gain admission. Trying to put the 20 points in perspective, applicants with perfect SAT scores only received 12 points toward admission. This system was later struck down by the Supreme Court, but another similar policy was upheld at the University of Michigan Law School. With how diverse our society is currently compared to years ago, it seems to compliment that the policies have indeed worked. But now, the policies are questioned by many as whether or not they moral, constitutional, and/or... ...s Cited Charles, Camille Z., et al. "Affirmative-Action Programs for Minority Students: Right in Theory, Wrong in Practice." The Chronicle of Higher Education 55.29 (2009). Academic OneFile. Web. 9 Aug. 2011. Selingo, Jeffrey. "New Study Questions Educational Benefits of Diversity." The Chronicle of Higher Education 49.29 (2003). Academic OneFile. Web. 9 Aug. 2011. Connerly, Ward. "My Fight Against Race Preferences: A Quest Toward `Creating Equal'." Chronicle of Higher Education 46.27 (2000): B6. Academic Search Premier. EBSCO. Web. 17 Aug. 2011. Chace, William M. "Affirmative Inaction: Opposition to affirmative action has drastically reduced minority enrollment at public universities; private institutions have the power and the responsibility to reverse the trend." American Scholar 80.1 (2011): 20-31. History Reference Center. EBSCO. Web. 18 Aug. 2011.

Madina Lake are an American rock/alternative band formed in Chicago in 2005

In this photo, Madina Lake has some very dark, murky colours in the background. Around the edge of the backdrop, it is entirely black. Black connotes that they have a lot of power and aggression in their singing since it is a very dominant colour. Also, it conveys a very sinister mood of sadness and unhappiness. So the colour of black already illustrates the personality of the whole band and what their music is about: powerful and aggressive music and their lyrics are sad and unhappy. As you focus into the centre of the backdrop, the colours shown are dark, murky greys and greens. The dark tone of the colours still conveys the feeling of sadness, and the shadowy green expresses hardship and misfortune. This reveals that in their history and backgrounds, they have encountered times of hardship and misfortune. The texture of the backdrop itself, a wall, is very shabby and tattered with some large holes which have been ripped out from it. This gives the impression that they are rough, angry band and have a very rocky style. The presentation of the band members is actually quite smart, but has the casual effect as well. They are sat on a white sofa on a white floor which indicates that despite the background gives them a powerful, aggressive appearance, each individual has their tranquil, peaceful side. They are all wearing slightly frayed jeans, showing they are casual and relaxed. Their shirts are smart and well presented; this points out that they also have their formal side to them. This fashion is quite popularly worn by rock bands these days, so this shows that they are your modern, up to date rock band. The lighting in the picture is used quite effectively. It concentrates on the band and gradually fades out around the edge. This is so the audience focuses on the band. As the edge of the picture is in shadow, it gives a feeling that they like to be enclosed by darkness, giving them an aspect of mystery. The eyes of the members are in shadow as well, further adding the aspect of mystery. All members of Madina Lake have some very attention-grabbing hair styles. Each member has their own unique style which shows that they want to stand out from each other in their own way. For example, Mateo on the left has blond hair with a black stripe running through it. The blond connotes that he is a fun and optimistic guy, but the black implies he has power and mystery within his fun and optimistic character. The camera angle is slightly canted at a low angle. The canted angle suggests they like to be interesting and dramatic and portrays a sense of unease and disorientation to the audience, and the low angle implies superiority and that they have power over the audience. This fits in with the dark, powerful colours they have used in the photo. To complete the analyses of this photo, Madina Lake are positioned very close to one another, connoting that the band are a very intimately connected group. There facial expressions are quite directed to the audience. The expressions upon their face have a component of seriousness, especially where the eyes are looking directly at the audience to grab attention and give the feeling they are connecting with you, but they have a relaxed body gesture because of their forward lean, open legs and relaxed hand position. This illustrates they can be calm and composed. The fact the band is made of four members gives an advantage, because you can't really have a middle person to lead and dominate the whole band, giving each band member equal values.

My Career As An Undergrad - 1102 Words

As my academic career as an undergrad comes close to an end, I sought out to explore the different opportunities that await me following graduation. As a requirement for this course, I met and interviewed with two women, Ana Reyes and Emily Angus, both of which are enrolled in the Counseling PhD program here at the University of North Texas (UNT) and serve as Licensed Professional Counselor Interns (LPCI). I chose these two women specifically because the courses of work they did following their bachelor’s degrees are similar to what I intend on doing following mine. As a Criminal Justice major with a focus in juvenile justice and minor in Counseling, I found it essential to conduct the interviews with individuals who could give me some insight on exactly what it is like to work with children children who are either delinquents or fall into the category of troubled children. In this paper, I will speak specifically about each of these two women and explore what led them to the ir current positions and profession in general, get into specific details about both past and present job positions, and discuss exactly what it mean to be an LPCI. Ms. Ana Reyes majored in Forensic Psychology and minored in Counseling at Tiffin University in Ohio. Much like myself, she planned on working for the FBI as a criminal profiler; however, she shortly discovered that she wanted to help people with issues more so than hunt them down. Following this decision, she began to work at a prison inShow MoreRelatedThe Between Undergrad And Grad Essay1067 Words   |  5 Pagesisn’t much difference between the undergrad and grad coursework. Yet this preconceived notion could be further from the truth. Without a doubt, the level of study for a graduate program is more rigorous and demanding than study involved at the undergrad level. 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