Conservation of Mechanical Energy Essay

Background: Kinetic energy is said to be the energy of motion. Kinetic energy can be defined through this equation: KE=12mv2 (equation 1) Where m is the mass of the object in motion, and v is the velocity of the moving object. Potential energy is the energy associated with the forces that depend on the position of the object. However, there are specific types of potential energy and in this lab we will consider gravitational potential energy. Gravitational potential energy is the energy possessed by the objected due to earth’s gravity. This can be specifically defined by the equation: PEgrav=mgy (equation 2) Where m is the mass of the object, g is the acceleration due to gravity and y is the height of the object. With these energies defined, total energy of the system is the sum of its kinetic energy and potential energy at any point in time. Total energy= kinetic energy+ potential energy=constant Therefore the law of conservation of energy is defined as: the total energy is neither increased nor decreased in any process. Energy can be transformed from one to another, and transferred from one object to another, but the total amount remained constant, therefore conserve. Procedure: the procedure of this lab involves a dynamic cart launched up a track towards a motion sensor. Once the equipment is set, measure the angle and record. Then use the coiled spring launcher to launch the dynamic cart by transferring kinetic energy which in turn sets the cart into motion along the cart. The cart will reach a maximum height on the track before it reserve direction. Collect the date of position and time by connecting the motion sensor to data studio which will record the results as the cart as the cart is in motion. Graph position versus time and velocity versus time with the data collected from the motion sensor. Conclusion: In this experiment we observed that no energy was lost in the system, however the energy was not conserved. This can be shown by energy versus time graphs. In the theory the law of conservation assumes that there is no friction, thus conserved energy. However, in this experiment we observed the friction that occurred between the wheels of the coaster and the track, and the wheels of the cart and the track. This friction explains how energy is not conserved and also due to a small fraction of the systematic error that occurred in conducting the lab. This error can be shown in the uncertainty of the angle and the uncertainty of the position of the cart by the motion sensor. With this uncertainty taken into account, it can explain why the line was not horizontal. To conclude the experiment proves that there is no energy lost in the system due to the transfer of potential energy to kinetic, however energy is not conserved due to friction.

Reflection on a clinical skill Essay

This essay will discuss a clinical experience in which I feel more competent in practicing. I will use a reflective model to discuss how I have achieved the necessary level of competence in my nurse training programme.The reflective model I have chosen to use is Gibbs model (Gibbs 1988). Gibbs model of reflection incorporates the following: description, feelings, evaluation, analysis, conclusion and an action plan (Gibbs 1988). The model will help facilitate critical thought process as it relates theory to practice. Discussion will include the knowledge underpinning practice and the evidence base for the clinical skill. A conclusion to the essay will then be given which will discuss my reflection skills, acknowledge my competence and show my personal and professional development. Trigger Event The clinical skill I have chosen to reflect on within this essay is my first IV start. I have chosen this as my first clinical placement is on a surgical unit, where Intravenous therapy is a widely used to administer medication. I was very happy to finally be able to start developing this skill as I have seen it done several time and was ever able to acquire the process in which is needed to start an intravenous. Appraisal The first stage of Gibbs (1988) model of reflection requires a description of events. As a transitioning Registered Practical Nurse to a Registered Nurse the expectation are that I will have develop this scope in my practice. I had observed this clinical skill on a variety of occasions and had previously administered IV medication and antibiotics under supervision. On this occasion I was being observed by my clinical educator. I had gathered all the necessary things I needed which included a bag of normal saline. My clinical educator was talk me through the procedure step by step and informed me that I should never place the tape on any surface as tit leads to cross contamination, and I should always clean blood from around the IV site. The facility also uses chlorhexadine instead of alcohol as eliminates stinging sensation. The second stage of Gibbs (1988) model of reflection, which is a discussion about my thoughts and feelings. I was aware of being under the supervision of my educator and other classmates this made me feel  very nervous and self- conscious. Once my professor said I am in do not advance I realize how truly nervous and under pressure I was feeling. I held my breath as I did not want this vain to blow and have to stink the patient again. This patient was an elderly gentlemen and I did not want the patient to feel that I did not know what I was doing. I thought that as I had been observed this clinical procedure on many other occasions it would be easy for me to do but it was very challenging, finding an appropriate vain, the right size of needle and wanting to get success on my first try made this a very trying experience. Exploration Evaluation is the third stage of Gibbs (1988) model of reflection and requires the reflector to with state what was good and bad about the event. This experience was filled with emotion because for many years I have been an rpn and I always wanted to be able to start an IV and I finally got to do just that. I think the best thing about this experience is I got it the first time and my instructor made it seem so effortless. So many times I had place tape on the hand rail of a bed in preparation of taping a dressing, I never thought of the fact that I was taking all the germs from that rail onto the patient. This one little thing has caused me to change my present practice. Integration Stage four of Gibbs (1988) is an analysis of the event, where Gibbs encourages the reflector to make sense of the situation. I will do this by exploring the skill and look for other opportunities to get more starts that I will feel more confident in my practice. In conclusion the use of this model of reflection has helped me to structure my thoughts and feelings appropriately. My level of awareness concerning evidence based practice, and its importance, has been enhanced with the use of critical reflection. My competence, within this clinical skill, has been further developed and I now feel that my personal and professional development is progressing. Using this reflective model has helped me to realise that my learning is something which I must be proactive in. Furthermore as a student nurse I have recognised that reflection is an important learning tool in practice.

How Race Becomes Biology Essay Example | Topics and Well Written Essays - 250 words

How Race Becomes Biology - Essay Example This measure prevents them from being too dependent and in need of constant help and attention. Feeding babies in schedules basically attempt to inculcate in them good and healthy feeding habits – a value they feel these children will need when they are of age. Letting the child cry it out is essentially practiced in order to teach the child about the realities of life and not to expect everything to go their way. Basically, these practices are aimed at inculcating cultural values such as independence, strength, discipline, and perseverance which are important virtues in the modern day world. Breastfeeding is both essential to the mother and the child. To the child, among other things, it reduces constipation, reduces incidences of ear infections, respiratory illnesses, allergies, diarrhea, vomiting, reduces the smell of stool and also reduces cases of sudden infant death syndrome and other ailments. To the mother, it reduces risks of postpartum hemorrhage, reduces chances of osteoporosis and cervical cancer, and also economically cushions her. Breastfeeding also enhances the bond between mother and child. According to Katherine Dettwyler, the natural minimum and maximum ages of weaning in humans range between 5.5 and 6.0 years. This is when their first premolars occur. The major reason most American women do not breastfeed is that breasts are perceived purely as objects of sexual attention. There is also inadequate breastfeeding support in the community. Nipple or breast pains also undermine breastfeeding.

Ethical Responsibilities of Australia Essay Example | Topics and Well Written Essays - 750 words

Ethical Responsibilities of Australia - Essay Example Television journalists are also the personalities seen on TV who report on sports, weather, and current events for local and even international television stations (â€Å"TV Journalist†, n.d.). They must have the capacity to think fast and improvise if needed because most of the time, the television journalists are broadcasted live on TV. In a study conducted by Nankervis (2005) in Australia, the television newsroom hirers want to recruit journalists that are â€Å"thinkers with inquiring minds.† They want to hire those who have â€Å"old-fashioned† skills of breaking news not covered in another place (Nankervis, 2005). According to Nankervis (2005), television journalists should have the drive for news, ambition and the confidence. But behind the faces aired on television for reports or news, the personalities are bound to fulfil their job responsively. How can television journalists be said to have complied with their responsibilities? What are the responsibili ties of the journalists? In Australia, most of the media journalists are members of the Australian Journalist Association (AJA), a division of Media Entertainment and Arts Alliance (MEAA) (â€Å"Journalist Code of Ethics†, n.d.). The members of the association are required to obey to the code of ethics (â€Å"Journalist Code of Ethics†, n.d). ... They give a practical form to freedom of expression. Many journalists work in private enterprise, but all have these public responsibilities. They scrutinise power, but also exercise it, and should be accountable. Accountability engenders trust. Without trust, journalists do not fulfil their public responsibilities. MEAA members engaged in journalism commit themselves to Honesty Fairness Independence Respect for the rights of others Australian Journalism Association also commit to obey their Guidance Clause which states that: Basic values often need interpretation and sometimes come into conflict. Ethical journalism requires conscientious decision-making in context. Only substantial advancement of the public interest or risk of substantial harm to people allows any standard to be overridden. Giving information to the public such as news or current affairs, the journalists have the responsibility to comply with the legal and ethical responsibilities of the profession. There are instan ces that television journalist are prosecuted by the concerned or affected members of the society who feel that the media journalists libelled them publicly. Thus it is the responsibility of the television journalists to familiarize with the existing code of ethics and media law where the journalists practice the profession. It is the responsibility of the journalists to know what lines they should not cross because there comes a time that the journalists may offend some people but should make sure that they did not violate any law. With the Code of Ethics guiding the Australian journalists including the television journalists, the journalists are restricted to pursue their own political agendas. They must not alter the truth. They should ensure fairness at all times. Their reports

Rhetorical Analysis Essay Example | Topics and Well Written Essays - 1500 words

Rhetorical Analysis - Essay Example region who tend to reside in the uptown Maryland and the Republican lawyers of the same area, who resides in the suburban parts of Virginia. If a lawyer of Maryland is asked to shift their dwelling to Virginia, they would just give an amazed look as if something strange and impossible has been proposed to them. The same thing would take place when an Interior decorator of West Hollywood is asked to move to Orange County. Similarly a barista belonging to owners from Athens named â€Å"In Georgia† would not find them fit for serving coffee to the American citizens. The same complaint can be seen everywhere. In the modern era of information and technology, the late author James Chapin noted a remarkable similarity between the different places and the inhabitants and in this context he said â€Å"every place becomes more like itself†. In the earlier days people used to consider those places suitable for living which includes lots of factory or other means of earnings, while now the same people look for places to reside which consists of people belonging to their culture. The author finds that the general people love segmenting themselves. According to him, the people are, â€Å"finding places where we are comfortable and where we feel we can flourish†. In this context the contrast nature of the United States has been put under limelight which often exhibits distinction between the institutions and blocks but as a whole they introduce themselves as a diverse nation. Mr. Brook states that diversity is often understood as racial unity. Many social reformers tried to incorporate this idea in their approaches towards a society without racial discrimination and it proved to be successful in the initial years. However the census data of 2000 reveals that racially integrated neighborhoods were found to rise during the 90s but due to some unknown reason the African families who were staying earlier with their

School Profiler Assignment Example | Topics and Well Written Essays - 1250 words

School Profiler - Assignment Example On the other hand, the school performed poorly in the category of English learners with only 15% of students passing CAHSEE in 2011 while 13% passing the exam in 2012 (School profiler, 2013). In 2014 the subgroups that required focus in their Adequate Yearly Progress (AYP) was the socioeconomically disadvantaged. They failed to meet their target of the proficient requirements in Language arts. The group also failed to meet their target in three consecutive years- 2011, 2012, and 1013 hence attracted attention. The group also failed to meet its targets in Mathematics in 2011 and 2013 and this was enough reason why the group required attention. Furthermore, socioeconomically disadvantaged groups still failed to meet their target in 2013 in their Academic Performance Index (API). The other sub groups met most of their targets in the three consecutive years. The school did well in Language arts specifically in the areas of RFEP. For instance, the number of students that passed was 90% in 2013, 87% in 2012 and 89% in 2011 (School profiler, 2013). Some grades performed better than others especially in the California English Language Development Test (CELDT). For instance, in advanced level, grade 9 and 11 performed better than grade 10 and 12. In early intermediate level, grade 12 did better in 2012 than other grades by scoring 23%. Performance in CST and CAHSEE exams varied among the grades in school. Between the two exams, it was evident that most students performed better in CST than in CASHEE. For instance, in the Language arts exams of 2013, only 21% of the grade 12 students passed the CAHSEE exam (School profiler, 2013). RFEP program was best-performed category while English learners recorded the least progress in Language arts. The school performed well in Mathematics led by the RFEP students. There are also variations in performance of Mathematics among the grades. For instance, in Algebra I, in 2012 grade 11 recorded the highest performance of 5%. Performanc e in both CST and CAHSEE exams tended to record variations. There were fluctuations in the results over the years and among the various groups of students. Out of the various groups and programs offered, the program that experienced progress was RFEP which recorded high level of students that scored highly. The least program in making progress was the special education students program, which saw only 26% of the students pass the exam. Sciences and social sciences were also part of the subjects done by students and whose result was provided. Sciences are many and included Biology, Chemistry, Earth science and Physics. The school did well in science and social sciences. Performance varied across the grades in different exams. For instance, in 2011, performance in Biology varied between the grades. Grade 9 students scored 76%, grade 10 scored 34% and grade 11 scored 37%. Such scores were replicated in other sciences and social sciences over the years (School profiler, 2013). There was fluctuation in performance in some of the science subjects. The science subject that recorded the most progress was Physics at an average score of 62% while the subject making the least progress was chemistry. Most of the students across the grades record low performance in Chemistry. The school did w

Supply and Demand of ETFs in the market Research Paper

Supply and Demand of ETFs in the market - Research Paper Example The market value of an individual ETF through out a single trading day depends on demand and supply for each and every ETF. They follow Index all through, but they act like Equity. ETFs can also be used to refer to those investment companies which are classified as Unit Investment Trusts (UITs) or open ended companies. Exchange-Traded Fund usually experience changes all through the day as they get to be bought and to be purchased. Exchange-Traded Fund does not have net asset value like mutual funds since it trades like a stock. The leading country in the development of ETF is Canada. It creation has roots in Toronto Stock Exchange with Toronto 35 Index Participation Units. The creation of ETFs starts when a professional investor like an investment bank places a whole stock portfolio with a fund manager where they exchange the basket of securities underlying the Index with the provider of ETF for new ETF shares. That is, the professional investor then receives a given quantity of ETF shares in return for the deposit. These shares can then be traded in the exchange market where they can be sold or bought by professional investors or retail from all parts of Europe. Creation units refer to large blocks of ETF shares which usually range from 100,000 to 200,000 shares per unit. The designated or professional investor or brokers usually break these creation units into individual ETF shares which then trade in the stock exchange. The creation and the issuance of ETFs consist of two markets which include the prima ry market which creates the ETFs and the secondary market which buys or sells the ETF units. The creation of ETFs therefore takes place in the primary market between the authorized participants and the fund. â€Å"In kind† creation on the other hand takes place in authorized participants and more so large financial institution. The ETF shares are created by the deposit of portfolio of stocks into the applicable fund, and this is done in