The viscosity of syrup Essay Example for Free

The viscosity of syrup Essay C intervals. The results are shown below in table and graph form. Time (s) Temperature (m) Speed (m/s) As I expected, the jar rolled faster at higher temperatures and slower at lower temperatures. At 0i C, the syrup was solid across one side of the jar. At this point the jar would not roll at all (this result is not shown on the graph so as not to effect the line of best fit). This was again because of the centre of gravity and the affect it has on the turning force. As the syrup cannot flow the centre of gravity settles directly above the contact point of the slope and the jar and will not move. The quicker the mass changes from one side of the jar to another the quicker the jar will role down the slope. This is shown in the diagram below. The Boltzmann Factor: The Boltzmann factor explains why the syrup flows quicker when warmer. It tells us that if a molecule is given enough energy (in this case by the heat energy) then it can break free from its surrounding molecules and flow. The more energy the flame gives the molecules the quicker they can flow into new positions. The formula for this is E/kT where E is the activation energy required to break the bonds between two molecules and kT is a constant (k)(depending on the liquid) and T the temperature in Kelvins. The formula shows that if kT is greater than E then the liquid will flow. As we do not know the constant we cannot work out the activation energy. Despite this the results still show that this is what is happening. This is relevant to this experiment as the higher the temperature the more energy the molecules will flow, so the syrup will flow easier. Anomalies: There were many places in my experiment where errors could have occurred. For example, when measuring the temperature of the syrup I removed some that was stuck to the thermometer. I scraped of as much as possible, but still some remained on the thermometer. Because of this I think my results are accurate to the nearest gram of syrup. The two most obvious places where inaccuracies could have occurred were, the constantly changing temperature and timing using my reactions. I think that these inaccuracies are minor and did not affect the results of the experiment in an important way. The results that I feel show this are the 64 and 66i C results where the jar appears to go faster as the temperature decreases. Because of this I have decided to ignore these results. Another major inaccuracy is in the grains of the slope, as it was not perfectly smooth. I think that although the grains may have slowed the jar down at some points, the jar then accelerated rapidly after this, so the average speed was about the same. However I cannot prove this so I will repeat some of the experiment on a metallic surface to see if I get the same results. Repeat: To repeat the experiment I shall use a metallic runway to stop friction from the slope affecting my results. Having one some preliminary rolls, I realised that the slope I was using, which was thinner than the other slope, meant that the jar repeatedly got jammed against the edges. I therefore decided to roll the jar 20cm, and use average velocities to compare my original results with my new results. I also decided to only repeat the experiment between 30-50i C, as these seemed a particular place of interest in the experiment. My results from the repeats are shown below. Conclusion: Despite these errors I still feel my results are/Are not accurate (I will repeat exp. Using metallic surface. The points between 30-50i C Show a clear change from a low velocity to a high velocity. I therefore concluded that this is comparable to activation energy. Activation energy is where a molecule has enough energy to perform a reaction. In this case the molecules have enough energy to change state from a very viscous liquid to a much less viscous liquid.

Steam Turbines :: essays research papers

Steam Turbines   Ã‚  Ã‚  Ã‚  Ã‚  The invention of the water turbine was so successful that eventually, the idea came about for extracting power from steam. Steam has one great advantage over water-it expands in volume with tremendous velocity. To be the most effective, a steam turbine must run at a very high speed. No wheel made can revolve at any speed approaching the velocity that a steam turbine can. By utilizing the kinetic energy of steam flow, the turbine could achieve a higher efficiency. As a result, the steam turbine has supplanted the reciprocating engine as a prime mover in large electricity-generating plants and is also used as a means of jet propulsion.   Ã‚  Ã‚  Ã‚  Ã‚  The action of the steam turbine is based on the thermodynamic principle that when a vapor is allowed to expand, its temperature drops. In turn, its internal energy is decreased. This reduction in internal energy is transformed into mechanical energy in the form of an acceleration of the particles of vapor. The transformation that occurs, provides a large amount of available work energy.   Ã‚  Ã‚  Ã‚  Ã‚  The essential parts of all steam turbines consist of nozzles or jets through which the steam can flow and expand. Thus, the temperature drops, and kinetic energy is gained. In addition, there are blades, on which high pressure steam is exerted. Stationary blades shift the steam onto rotating blades, which provide power. Also, turbines are equipped with wheels or drums where the blades are mounted. A shaft for these wheels or drums is also a basic component, as well as an outer casing that confines the steam to the area of the turbine proper. In order to efficiently use this contraption, it is necessary to have a number of stages. In each of these stages, a small amount of thermal energy is converted to kinetic energy. If the entire conversion of energy took place at once, the rotative speed of the turbine wheel would be way too excessive.   Ã‚  Ã‚  Ã‚  Ã‚  Steam turbines are really quite simple machines, that have only one major moving part, the rotor. However, auxiliary equipment is necessary for their operation. Journal bearings support the shaft, and an oil system provides lubrication to these bearings. A special seal system prevents steam from

Family Planning Essay

Introduction Family planning is the planning of when to have children, and the use of birth control and other techniques to implement such plans. Other techniques commonly used include sexuality education, prevention and management of sexually transmitted infections, pre-conception counseling] and management, and infertility management. Family planning is choosing the number of children in a family and the length of time between their births. When you start searching for options in family planning, it’s important to understand all of your choices and which might be best for you. When you’d like to postpone a pregnancy, artificial and natural methods of family planning can help you do so. Also, if you’re ready to plan a pregnancy, it’s important that you have the knowledge to maximize your chances for conception. Family planning is the voluntary planning and action taken by individuals to prevent, delay or achieve a pregnancy. Family planning services include counseling and education, preconception care, screening and laboratory tests, and family planning methods. Family planning methods include abstinence, natural family planning and all FDA approved methods of contraception including hormonal contraception and contraceptive supplies such as condoms, diaphragms and intrauterine devices. It is a fundamental aspect of enhancing the health outcomes of women and children. There are many family planning options ranging from contraception and birth control to abstinence and other natural methods to the latest medical technology breakthroughs. Rationale Family planning is method of rationally deciding the size of your family. Using family-planning methods can help decide how large your family should be as well as how long to wait in between children and how to avoid unwanted pregnancies. Proper, non-coercive, science-based family planning can help you create a family that meets your needs and wants. Access to effective methods of birth control is an important component of family-planning services. A healthy relationship between two partners generally includes periodic sex. Having sex may result in pregnancy. Helpful family planning should allow you access to safe and efficient methods of birth control. An ideal form of birth control should be easy to use, have minimal side effects, reduce transmission of disease and be easily reversible. Family-planning workers may distribute condoms, fit a woman for an IUD or give her birth-control pills. Family planning can help you limit the size of your family. Families with more children may struggle financially and emotionally. Parents may not be able to provide each child with adequate resources such as access to educational opportunities. A family-planning worker can help you decide how large you would like your family and help you find methods to achieve that goal. Read more: Rationale of Family Planning | eHow.com http://www.ehow.com/about_5403126_rationale-family-planning.html#ixzz2KRvrvU4l Read more: Rationale of Family Planning | eHow.com http://www.ehow.com/about_5403126_rationale-family-planning.html#ixzz2KRvkT2X4 Objectives Goals in family planning should include balancing the desire for children with emotional, physical and financial needs. Or, if you do not wish to have children, it’s important to recognize this and plan accordingly. Significance of the Study This study will show clearly the effects of Family Planning on the people of our Brgy Basing Binmaley and Brgy. Patayac Sta. Barbara. The importance of this Study is to provide information to government and educate the people on the need to control birthrate, and will also assist husbands and wives to enjoy sex without unwanted Pregnancies, to help to space their children well and conveniently too; to limit the size of individual family to suit economic state. It also helps to reduce the possibility of health dangers through frequent birth and benefits to teenagers to prevent unwanted pregnancies instead of preventing child births through abortion and also on their choice of methods of contraceptives which will be effective for their age group. Scope and Limitations This present study is focused on â€Å"Effect of Family Planning† This study on â€Å"Effect of Family Planning â€Å" will used 10 respondents compressing of selected Family in our Barangay in Basing Binmaley and Barangay Patayac Sta. Barbara Pangasinan, where the researchers are living. The research subjects will answer the prepared questionnaires. II. Methodology / Research Method There are many options for family planning out there, and it is confusing to sort through all of them. Each one has different effectiveness ratings, but some are more comfortable (for some people) than others. Reading through a simple breakdown of all of the family planning methods available will help you weed out the ones you are not interested in, so you can go about researching just the ones that are of interest to you. Read more: Different Family Planning Methods | eHow.com http://www.ehow.com/facts_4866824_different-family-planning-methods.html#ixzz2KS3dngqt

Goal-Setting Theory of Motivation - 2104 Words

INTERNATIONAL JOURNAL OF MANAGEMENT, BUSINESS, AND ADMINISTRATION VOLUME 15, NUMBER 1, 2011 Goal-Setting Theory of Motivation Fred C. Lunenburg Sam Houston State University ABSTRACT Locke and Latham provide a well-developed goal-setting theory of motivation. The theory emphasizes the important relationship between goals and performance. Research supports predictions that the most effective performance seems to result when goals are specific and challenging, when they are used to evaluate performance and linked to feedback on results, and create commitment and acceptance. The motivational impact of goals may be affected by moderators such as ability and self-efficacy. Deadlines improve the effectiveness of goals. A learning goal†¦show more content†¦Asking organization members to improve, to work harder, or to do your best is not helpful, because that kind of goal does not give them a focused target. FRED C. LUNENBURG _____________________________________________________________________________________3 Specific goals (often quantified) let organization members know what to reach for and allow them to measure their own progress. Research indicates that specific goals help bring about other desirable organizational goals, such as reducing absenteeism, tardiness, and turnover (Locke Latham, 2002). Goals Must Be Difficult but Attainable A goal that is too easily attained will not bring about the desired increments in performance. The key point is that a goal must be difficult as well as specific for it to raise performance. However, there is a limit to this effect. Although organization members will work hard to reach challenging goals, they will only do so when the goals are within their capability. As goals become too difficult, performance suffers because organization members reject the goals as unreasonable and unattainable. A major factor in attainability of a goal is self-efficacy (Bandura, 1997). This is an internal belief regarding one’s job-related capabilities and com petencies. If employees have high selfefficacies, they will tend to set higher personal goals under the belief that they are attainable. The first key to successful goal setting is to build and reinforceShow MoreRelatedGoal Setting Theory Of Motivation Essay877 Words   |  4 PagesEssay question: It is often claimed that goal-setting is a theory of motivation which works. Critically evaluate the evidence and discuss the extent to which it supports this claim. Introduction As element that drives the person to strive for the best within his or her own capacity, Guay et al. (2010) defined motivation as reasons that underlie behaviour. It is also interpreted by Huitt, W. (2011) cited Kleinginna and Kleinginna (1981) as an internal state or condition (sometimes described as aRead MoreThe Goal Setting Theory Of Motivation1818 Words   |  8 PagesLocke put forth the Goal-setting theory of motivation. This theory states that goal setting is fundamentally linked to task performance. It standardizes the idea that specific and challenging goals along with constructive feedback, contribute to enhanced task performance. Locke, one of the most notable contributors in goal setting theory, alongside Gary Latham have contributed to the history and evolution of goal setting while highlighting strengths and weaknesses of the theory in practice used byRead MoreMotivation Theory And The Goal Setting Theory1159 Words   |  5 Pages Essay 1 Content theories of motivation focus on the importance of work itself, challenges, growth opportunities and responsibilities that the work provides employees. Process theories of motivation focus on the cognitive processes that are part of employee’s decision making. It also deals with our thoughts and perceptions about our jobs. The decisions are made based on calculations of gains versus loses. Also, when it comes to process theories of motivation, how the work situation is perceivedRead MoreThe Goal Setting Theory for Employee Motivation1302 Words   |  6 PagesGoal setting theory can help motivate employees to do their job as managers can relate to Professor Edwin Locke goal theory. The underlying concept behind this theory is the belief that people’s goals play a vital part in deciding their behavior. People drive to satisfy these goals to help their emotions and desires. Goals guide people’s responses and actions. Goals command employee performance an d actions and this can call for action or feedback. The effort that individuals will exert in attemptingRead MoreGoal Setting Theory: Motivation, Stress, and Communication1278 Words   |  5 PagesMotivation, Stress, and Communication Motivation, Stress, and Communication Introduction Goal-setting has progressively become a prominent tool of performance utilized by individuals and business organizations. Companies attain their success by setting long and short-term targets which provide them with direction in productive channels economically. Some of the common attributed elements in goal setting include: sales, services, products, and customer relations in general. The setting of goalsRead MoreCompare and Contrast Expectancy and Goal Setting Theories of Work Motivation. Which Do You Find the More Useful and Why?1384 Words   |  6 Pagescontrast expectancy and goal setting theories of work motivation. Which do you find the more useful and why? Two of the best known approaches to work motivation are the expectancy theory introduced by Victor Vroom (1964) and the goal-setting theory introduced by Edwin A. Locke (1968). Both of these theories have garnered support from subsequent empirical research and have proved influential in how companies motivate their workers through incentive schemes and objective-setting exercises. As theirRead MoreBackground Of Id Medical Group1389 Words   |  6 Pagesbrand, motivation and engagement. The wellbeing is bound up flexibility, work-life balance, motivation, job-satisfaction and human research management. For this reason, the rank of giving something back and wellbeing is very high in 100 companies (high level means not good at about a topic). The two category have included a joint topic which is motivation. The company is not good at about motivation. Therefore, the company is not good financially. 3.0 Motivation and Theories 3.1 Motivation For motivationRead MoreHow Managers Motivate Employees And Helping Managers Keep Their Employees Motivation High Essay1492 Words   |  6 PagesMotivation in the workplace has been a frequently discussed subject for at least a century. Whether an employee is doing paperwork behind a desk, helping to put together a car on a conveyor belt, or trying to make a sale, motivation is essential in their job. The reason behind this is simple enough- the more motivated an employee is the more work they tend to get done. However, it can be a struggle for managers to keep their workers motivated. This struggle has led to the development of numerousRead MoreEssay on Reinforcement Versus Goal Theory724 Words   |  3 PagesReinforcement versus Goal Theory Lorraine Patterson OMM 625 Learning Organizations amp; Effectiveness Professor Renee Hill January 30, 2012 According to Edwin Locke the goal setting theory is a tool used for motivation. The theory states that goal setting is linked to task performance. The goal states â€Å"specifically challenging employees while using feedback will contribute to a higher and better performance while completing a task.†(Pane, S) The idea of workingRead MoreEssay on Insight on the Motivation of Workers596 Words   |  3 PagesMotivation has always been a subject of much research over the last fifty years however there have been many definitions and theories describing and analysing motivation but the research is never complete. Right from Robert Owen who described human beings to be like machines that need care and maintenance to work efficiently till Drucker (1999) who described them as the knowledge workers of the 21st century with different needs and therefore on what it is required I would like to elaborate on the