Speed Essay Example

Speed Essay Example Speed Essay Speed Essay Trevor Hale 10th Physical Science 01 / 16 / 09 1. A: Reference Point a point against which position is measured. B: Vector Quantity a physical measurement that contains directional information. C: Scalar Quantity a physical measurement that does not contain directional information. D: Acceleration the time rate of change of an objects velocity. E: Free Fall the motion of an object when it is falling solely under the influence of gravity. 2. No. Motion depends on the reference point that is used. 3. That depends on the reference point that is used. The glass is not moving relative to the counter. 4. A: The girl joggers. B: Child in inner tube. C: The first girl jogging. 5. 30 Min. x 1 Hr. = 0. 5 60 min. 10 Miles = 20 Miles/Hr. 0. 5 Hours 6. 6 Kilometers x 1000 Meters = 6000 Meters 1 Kilometer 45 Min. x 60 Seconds = 2700 Seconds 1 Min 6000 Meters = 2. 2 Meters 2700 Seconds Second 7. A: 10 meters scalar quantity, distance. B: 1. 2 meters/second? east. C: 3. 4 feet/hour and slowing scalar, speed. D: 56 liters, scalar, none of these. E: 2. 2 miles/min east, vector, velocity. F: 2. 2 milometer’s/year, scalar, speed. 8. Relative speed = 57 Miles 45 Miles = 12 Miles Hour Hour Hour 12 Miles/Hour toward each other. 9. Since velocity is constant, there is no acceleration. 10. 12 Meters Per Second = 6 Meters per second? west. 2 Seconds 1. 30 Miles Hour 12 Min. x 1 Hour = 0. 2 Hours. 60 Min. 30 Miles ? 0. 2 Hours. Hour 150 Miles/Hour? south. 12. Any object that is affected greatly by air resistance cannot experience free fall when dropped near the surface of the earth. In order to experience free fall, an object must be falling solely under the influence of gravity. Air resistance is an influence other than gravity. 13. All objects falling near the earth’s surface accelerate equally. 14. Both hit at the same time since there is no air resistance.

Words linked to Alzheimers - Emphasis

Words linked to Alzheimers Words linked to Alzheimers Your words could say more about you than you realise. New research suggests that changes in vocabulary could be an early sign of Alzheimers disease. The study by scientists at Southampton university focuses on the speeches of former UK Prime Minister Harold Wilson. It supports the theory that he was suffering from the condition but never diagnosed. Writing in the Journal of Neurolinguistics, the universitys Dr Peter Garrard says hes detected a marked change in the words Wilson used in the months leading up to his unexpected resignation. It seems that Wilson stopped using his trademark broad vocabulary shortly before he resigned, relying instead on much simpler words. Dr Garrard has detected similar changes in the work of the author Iris Murdoch, who died of the disease in 1999. Short words more powerful The use of short words, of course, is not in itself an indicator of Alzheimers. Another famous prime minister and orator, Winston Churchill, favoured short words over long ones, as he felt they were more powerful. Our work with hundreds of the UKs top organisations over the last ten years suggests that overuse of long words may actually be a sign of under-confidence. Click here for details of our course on Writing high-impact speeches and presentations.

Coorinating Emergency Response - Crisis Management Essay

Coorinating Emergency Response - Crisis Management - Essay Example Myanmar Government preferred government to government aid. AmeriCares required permission for airlift supplies which was a challenging and proved to be time taking process. The efforts could have brought more differences in relieving people from suffering and dying. The political pressure was high in the case of efforts of AmeriCares. However during such kind of natural disaster the effort should be to ensure proper assessment of disaster, coordination among various teams of rescue efforts, proper flow of food, medical and other supplies for relief, coordinating response through public information officers and media channels, collaboration of global efforts for the rescue and relief operations, informing public about their lost relatives, friends and dear ones and informing general public about disaster. However political situation of Myanmar did not allow all these things. Once disaster takes place in certain area, depending upon the nature of disaster and damage caused to the communication network, disaster management team finds out alternatives for communication to ensure proper flow of communication. In major disasters, communication infrastructure gets damaged or destroyed. Government agencies and disasters management agencies should have an alternative communication strategy for disasters. The information sent or receive should be short, clear and simple. An effective communication strategy during any disaster supports the coordination activities and helps in rescue and damage control operations. The Transitional Fires are significantly dangerous as the exposure of firefighters is high on hourly basis and is very risky for them. It is highly risky for resulting in injuries and fatality. It is threatening for the firefighters and influences their level of motivations negatively. The crisis management and emergency response to the transition fire requires combined efforts of Forest Service Firefighters, researchers and analysts. These can

Life Stage Interviews and Reports Paper Essay Example | Topics and Well Written Essays - 2000 words

Life Stage Interviews and Reports Paper - Essay Example If a person develops good eating habits, exercises daily, and possesses a positive attitude with regard to the everyday activities since early childhood. He/she will have higher probability to live longer as compared to a person who uses drugs, drinks alcoholic beverage excessively or lives a sedentary life. Many of the late adulthood in the developed countries live longer due to more medical assistance and educational resources available. However, living longer truly depends on the person’s mindset. The development and resulting lifespan of people may be dependent on such factors as their perception of death or afterlife, resiliency in confronting changes in adulthood and attributed value to life. This paper discusses how factors such as their perception of death or afterlife, resiliency in confronting changes in adulthood and attributed value to life have affected the development and quality of the lives of the interviewees who are in their late stages of adulthood. As their views are compared and further information gathered, the apparent role of adult development factors are exhibited. Fear of death or dying is natural and sometimes may cause individuals to become preoccupied and obsessive with the thoughts of death. At times, just the mere mention of death may even cause substantial anxiety for some people. To further illustrate how the fear of death is actually universal, the presence of death is often frightening and unwelcome or even taboo to discuss in some cultures. In more modern cultures, death has been accepted as eminent, thus, embraced. However, the restrictions to certain foods that can be eaten or clothing that can be worn to avoid death or prolong life still prevail. Based on recent psychological studies, there are five primal fears, i.e. fear of dying, the unknown, abandonment, loss of control, pain, and bodily deterioration (Garfield, 2001). All these

Stereotyping Genders from Everyday Use Essay Example for Free

Stereotyping Genders from Everyday Use Essay Stereotyping men and women have always been an issue in literature and media but it should not be so if one accepts that all people are different and it is this difference that affects the social perception being expressed in the different forms of literature and media. In a speech made by Professor Amy Wax of the University of Pennsylvania School of Law, she explained that stereotyping studies have become too focused on the achievement levels of men and women but never really gave in-depth analysis to why men seem to have more â€Å"success† in popular fields such as authorship in literature, engineering, etc. Professor Wax argues that men and women possess differences that explain this circumstance such as their views on competition, ambition and aggression. Women, she believes, â€Å"possess a greater attraction to and interest in people rather than things, a relative reluctance to focus on career advancement at the expense of domestic pursuits, and a stronger desire to achieve life balance† compared to men. (Silvester 2008) This can be seen in the short story, â€Å"Everyday Use† written by Alice Walker in 1973. The story portrays three very different women within one nuclear family. Mama is big-boned and strong enough to do work that men are fit to physically do. Maggie is timid and insecure about many things probably because she had always been the practical and not worldly sister. Dee, on the other hand, is very prone to social pressures and is more assertive than most women. These three different characters show that women live beyond what others are suggesting as stereotypical. Alice Walker is very vivid in her descriptions of these women. She used Mama as a narrator to show her strength of character and make many descriptions of how the two daughters had grown up to become who they are now. Maggie’s dialogues also gave many insights to the family’s heritage while Dee’s behavior created a very vivid picture of how she had succumbed to the media hype and commercialization of women being worldly. The exchanges of thoughts and words among the three women made the literature vibrant and technically excellent in its character depictions. Dee obviously had given in to the social pressure of being a modern woman who seemingly knew more about the world through her education and disdain for domestic life. She wanted to be the modern woman who never let limits stand in her way. Maggie, on the other hand, gave in to becoming just a simple shadow behind her sister because she looked up to her stronger personality. Mama, on the other hand, did not let anything stand in the way of things that had be done. She was practical and accepting of her circumstances and was content to do what was necessary to survive without minding what Dee thought of as domestic or backward. In creating intense mother figures in fiction or recalling them in memoir, African American writers such as Alice Walker have paid tribute to the beauty, struggles and sorrows of black motherhood. (Davis 2005) The theme of how these three women view the world and fight back at its pressures are still very relevant to today’s society simply because it showed that people, even within one gender type and blood type, can be different. People may or may not be affected by what the world throws at them through the different forms of media and social pressures that come their way. It is difference in perspective and personality that expresses character whether or not it is stereotypical of any gender. References Davis, Bernadette. â€Å"Remembering mama: images of mothers, good, bad, real or fictive abound in our literary tradition. † May-June 2005. Black Issues Book Review. 14 March 2009 http://findarticles. com/p/articles/mi_m0HST/is_3_7/ai_n13721824 Silvester, Tim. â€Å"Stereotype Threat: Fact or Fiction? † 25 November, 2008. Docket Online. 14 March 2009 http://media. www. docketonline. com/media/storage/paper744/news/2008/11/25/News/ Stereotype. Threat. Fact. Or. Fiction-3565977. shtml Walker, Alice. â€Å"Everyday Use. † Robert DiYanni, ed. Literature: Reading Fiction, Poetry, and Drama. 6th ed. Boston: McGraw-Hill, 2007. 743-749.

The Study of the Relationship (Satire) Essay -- essays research papers

The Study of the Relationship Introduction A relationship? Something meaningful? Forever? HA! All ploys and devious schemes devised by horifically cruel creatures, in order to have their every wish granted for all of eternity. These terms were created to destroy our lives, they were created by the most evil and demented of all creatures, The Female. Ask any boyfriend, or should I say "slave", and they will tell you that the Female is a very mean creature that gets her every way without any questions. They turn us into their servants and force us into a permanent relationship, or a permanent "slavery", as I prefer to call it. Step One: Scouting Their Prey The First thing you need to remember about these...things, is that they always, without exeption, travel in packs. So remember that when aproaching one of them. Back to the point at hand. When in the proper habitat that these Females inhabit, stay cautious, as they seem to sometimes pounce upon their prey, and ask you to preform something that you are currently incapable of (example: asking you to dance). These manuvers are used to make you semi-embaressed, and thus would do anything to regain your higher status, no matter how long it takes you. Thus they have control before any plans are even made. Step Two: Pulling Out The Whip After the initial request made by the male generally, thye begin to start a "relationship", or so it is called. By this time you are already stuck with her, and all of your friends...

Is Decoherence a Solution for the Measurement Problem

Abstract—Decoherence is considered as one of the important topics in quantum computing research area. Some researchers stated that decoherence solved the measurement problem and on the other hand many researchers stated the opposite. In this paper we will prove whether decoherence is a solution or not through an exhaustive survey of the different ideas, methodologies, and experiments. Index Terms—Quantum computing, decoherence, measurement problem INTRODUCTION Decoherence is considered as one of the important research areas since 1980s.Quantum decoherence is the Loss of coherence or ordering of the phase angles between the components of a system in quantum computing superposition and the consequence of this is classical or probabilistically additive behavior†¦ (Zurek Today 10 (1991)) Wave function collapse is the reduction of the physical possibilities into a single possibility as seen by observer can appear in quantum decoherence also it justifies the framework an d can predict using classical physics as an acceptable approximation†¦ Namiki and Pascazio 1991). However, decoherence is a mechanism that emerges out quantum stating point also it determines the location of the quantum classical boundary moreover decoherence appear when the quantum system interacts with its environment in a thermodynamically irreversible way and that lead to prevent different factors in the quantum superposition of the system and environments wave function from interfering with each other†¦ Zurek Today 10 (1991)) Decoherence can be viewed in different ways such as flowing information from the system to the environment lead to lose information this is known as heat bath since each system is losing some of its energetic state because of its surroundings environments†¦ (Kumar, Kiranagi et al. 012) There is also another view of decoherence that is called isolation; which is the combination of the system and the environment which known as non-unitary ther efore the dynamics of the system alone are irreversible also as a result of combination of system and environment the entanglements are generated between them and that will lead to sharing quantum information without transferring these information to the surroundings†¦ (Lidar and Whaley 2003) Describing how the wave function collaps occurs in quantum mechanics called measurement problem. The disability of observing the process directly lead to different nterpretations regard quantum mechanics, also it rises too many qustions that each interpretation must answer. However there are some researches provides aprove that the decoherence solved the measurment problem and some other researchers prove the opposite thus in this paper we will make a comparasion between these two different point of views†¦ (Kumar, Kiranagi et al. 2012) PROBLEM IDENTIFICATION Decoherence is a real challenge that prevents implementing quantum computers; because the machines rely on undisturbed evolutio n of quantum coherences†¦ (Chen, Ang et al. 003), (Flitney and Abbott 2004) Decoherence provides an explanations for the appearance of the wave function collapse it does not generate actual wave function collapse and that is the nature of quantum systems it leaks into the environment and that done by decomposing the component of the wave function from the coherent system and then applying phases to the environment†¦(Flitney and Abbott 2004) P. W Anderson claimed that decoherence has solved the Quantum measurement problem while S. L Adler prove the opposite†¦. Adler 2002) In this paper, we will conduct a comprehensive survey of the different views and experiments to come up with a solution for the relationship between decoherence and measurement problem. Decoherence is the Solution Zurek (1991), Tegmark and Wheeler (2001), and Anderson (2001) stated that decoherence has solved the quantum measurement problem by eliminating the necessity for Von Neumann’s wave fu nction collapse postulate. Osvaldo Pessoa Jr. wrote an article titled â€Å"Can the Decoherence Approach Help to Solve the Measurement Problem? He concluded that decoherence could help to solve measurement problem in open systems. From that point, he wanted to count on the open systems to solve the measurement problem of individual systems. He also mentioned that decoherence helps to get an approximate solution for the statistical version of the measurement problem. Wallace (2011) mentioned that decoherence explains why the measurement problem is a philosophical rather than a practical problem and stated that decoherence could solve the measurement problem.He claimed that the quantum state continues to describe the physical state of the world. So, decoherence finds its natural role in the measurement problem as the process which explains why quantum mechanics can be fundamentally deterministic and non-classical, but emergently classical. It does not dull the aspect of Everett's pro posal, which states that all are equally part of the underlying quantum reality. Decoherence is Not the SolutionThe decoherence initiative was to explain the transformation from large to conventional by evaluating the relationships of a program with a determining program or with the environment. It is realistic to think about a large specialized substance or program of pollutants as a divided program boating in unfilled space. Dynamical Failing Styles Somehow do not like the idea of failure due to professionals trying to rig the pattern function improvement so to advantage loss of the situation vector in a well described way.One way is to say that the pattern function, or at least an element of it, consistently gets â€Å"hit† in such a way as to cause localization in the position base. Another way is to add a not unitary term into Schrodinger’s program. There are suggestions stated that we can infer using mind ability to get the collapse of the wave function Tohmas Br euer at 1996 try to investigate these suggestions and apply it to recent results of quantum machines regard restrictions on measurement from inside.Tohmas Breuer count on these restrictions to come up with a phenomena of subjective decoherence therefore he split his article into parts. The first part is â€Å"measurement from inside† and he makes a presentation to illustrate why it is impossible for an observer to make a distinction between all states in a system in which an observer is contained and that consider as restriction on the measurability from inside, he conclude that bigger system O need more parameters to fix its state.However, this will lead to situations that big O can be determined of each physically possible state by the state of a subsystem A together with some constraint. Second part is â€Å"EPR-Correlations† and he focus on situation which stronger results hold when we take into account particular features of quantum mechanical situations for examp le if we have two systems A and some environment R then the union of two system A ? R equal to Big O. also if both systems A and R have Hilbert spaces HA and HR as state spaces then EPR correlations can be obtained in the vector states HA HR .Therefore he conclude that A con not make a distinction between states of O which is make difference only in the EPR correlations between A and R. however observers can only be able to make a measurement of EPR correlations between A and R in A ? R†¦(Breuer 1996) David Wallace wrote his article to achieve two goals the first one is to present an account of how quantum measurements are dealing with in modern physics in other word quantum measurements does not involve a collapse of the wave functions also to present the measurement problem from that account perspective of view.The second part is concentrate on clarifying the role of decoherence plays in modern measurement theory and what affects it has on the different strategies that have been proposed to solve measurement problem. Wallace concluded that it seems not possible to have a complete understating of the microscopic predictions quantum mechanisms without interpreting the state in a probabilistic way and that because of interference since quantum states cannot be thought of as probability distributions in physical states of airs.Therefore it is allowable to try to resolve the incoherence by two ways, the first one by philosophical methods which means trying hard to think about how to make a full understanding quantum states so as to come out with a non-incoherent way, also the second way done by making modifications on the physics which means trying to make a replacement of the quantum mechanics by using some new theory which does not prima facie lead to the conceptual incoherence.Finally, Wallace state that the natural role of decoherence can be found in the measurement problem as the process which provides an explanations regard why quantum mechanics, inte rpreted can be basically not classical and deterministic, but critically classical†¦(Wallace 2011) Dan Stahlke based on application he made state that the most important point of decoherence theory is that it provides understanding about the process of wave collapse. Some systems need to be built in way that it stays in coherent superposition.However, tendency of system that been in superposition can be immediately calculated. Also he stated that decoherence does not give the ultimate solution in the measurement problem but it bring some light to the matter†¦(Stahlke 1999) Maximilian Schlosshauer makes a distinctive discussion regard the role of decoherence in the foundation of quantum mechanics, and focusing of the effectiveness of decoherence regard the measurement problem. He concludes that within a standard interpretation of quantum mechanics that decoherence cannot solve the problem of definite outcomes in quantum measurement.Therefore he mention the effectiveness of environment super selection of quasiclassical pointer states along with the local superposition of interference terms can be put to large use in physical motivation, assumptions and rules regard alternative interpretation approaches that can change the strict orthodox eigenvalue-eigenstate link or make modification on the unitary dynamics to account for the awareness of definite outcomes†¦(Schlosshauer 2005) Elise M.Crull mention in his article that it has been claimed that decoherence has solved the measurement problem. In other hand, some researchers stated that it does not solve the measurement problem. However, the Crull target is â€Å"Which measurement problem? †, thus he argue three questions depending on Max Schlosshauer which has neat catalog on the different problems which called â€Å"the measurement problem†Ã¢â‚¬ ¦(Schlosshauer 2008; Crull 2011) Harvey Brown stated that there are many attempts to proof the insolubility of the measurement problem in non -quantum mechanics.We can use these attempts for quantum mechanics. These proofs tend to establish that if mechanical interaction between object system A and measuring instrument B is described through a suitable defined unitary operator on the â€Å"Hilbert† tensor product space, so the final state of the A + B together cannot be described by a density operator of a specific kind in that space.Therefore this leads us to a resolution in terms of weighted projections which be useful to interpreted as mixture of pure A + B states, which are eigenstates corresponding to the â€Å"pointer position† that observable connected with the instrument†¦(Brown 1986) Ford, Lewis and Connell count on a book â€Å"Decoherence and the Appearance of a Classical World in Quantum Theory† †¦(Giulini, Joos et al. 1996) which state that ‘‘irreversible coupling to the environment seems to have become widely accepted ~and even quite popular!During the last decade, not least through the various contributions by Woljciech Zurek and his collaborators. ’’ And he conclude that general and simple formulation of quantum measurement gives a good method regard discussing quantum stochastic systems†¦(Ford and Lewis 1986) . Also authors stated that decoherence appear at high temperature with or without dissipation and the time for both cases are the same furthermore at zero temperature, decoherence occurs only in the presence of dissipation†¦(Ford, Lewis et al. 001) In 1980s and 1990s techniques are established to cool single ions captured through a trap and to control their state by using laser light and the single ion can be observed using photons with minimal interaction with the environment. Photons can observed without being destroyed during interaction together with atoms in designed experiment. That leads to make a study regard pioneers that make a test for basis of quantum mechanics also the transition between microscopic and microscopic world.The most important stage in controlling the quantum state regard ion is cooling it to the lowest energy of the trap using a common technique called sideband cooling†¦(F. Diedrich, Bergqvist et al. 1989) this technique consists of exiting the ion, increasing inside energy also decreasing the vibration energy†¦(SCIENCES 2012) Bas Hensen starting his discussion by defining the measurement problem and he stated that measuemet problem begin naturally from quantum theory’s success through describing the realm regard microscopic particles also permitting them to have definite values for quantities like momentum and position.Then he split the problem into several parts. The first two parts are â€Å"the problem of outcomes: Why does one perceive a single outcome among the many possible ones in equation? †, â€Å"The problem of the collapse: What kind of process causes the state of the system to ‘collapse’ to the outcome one percei ved (in the sense that a repeated measurement yields the same answer)? † in these two part he found that in quantum the world must be divided into a wave quantum system and the rest stays in some classical system.Also in accuracy point of view the division is made one way or another in a particular application. The third part is â€Å"The problem of interference: Why do we not observe quantum interference effects on macroscopic scales? † in this part author stated that the best way to illustrate this problem by using the double slit experiment. The experiment shows that the physical setup suggests that grouping the probability distribution gained with either one of the slit opened should occur in the probability distribution regard the two slits opened.For this situation of electrons as particles the probability distribution regard course differs, but regard a similar setup using macroscopic particles it doesn’t†¦(Hensen 2010 ) Dieks reviewed several proposa ls that solved the quantum mechanical measurement problem by taking into account that in measurement interactions there are many unobserved degrees of freedom. He found out that such â€Å"solutions† are unsatisfactory as they stand, and must be supplemented by a new empirical interpretation of the formal state description of quantum mechanics (Dieks 1989).Zurek mentioned in † Decoherence, Einselection, and the Quantum Origins of the Classical† that decoherence is caused by the interaction in which the environment in effect monitors certain observables of the system, destroying coherence between the pointer states corresponding to their eigenvalues. Then, he mentioned that when the measured quantum system is microscopic and isolated, this restriction on the predictive utility of its correlations with the macroscopic apparatus results in the effective â€Å"collapse of the wave packet†; which implicitly states that decoherence did not solve the measurement p roblem (Zurek 2003).Elby scrutinized the claim that the measurement problem is solved by decoherence, by examining how modal and relative-state interpretations can use decoherence. He mentioned also that although decoherence cannot rescue these interpretations from general metaphysical difficulties, decoherence may help these interpretations to pick out a preferred basis (Elby 1994). Janssen mentioned that the alleged relevance of decoherence for a solution of the â€Å"measurement problem† is subjected to a detailed philosophical analysis.He reconstructed a non-standard decoherence argument that aimed to uncover some hidden assumptions underlying the approach. He concluded that decoherence cannot address the â€Å"preferred-basis problem† without adding new interpretational axioms to the standard formalism (Janssen 2008). Busch et al (1996) explained decoherence using the many-worlds interpretation and stated the decoherence cannot solve the measurement problem. Legge tt (2005) concentrated on the paradox of Schrodinger's cat or the quantum measurement paradox to prove that dechorence is not a practical solution.Other researchers and scientists including Gamibini and Pullin (2007), Zurek (2002), Joos and Zeh (1985), Bell (1990), Albert (1992), Bub(1997), Barrett (1999), Joos (1999), and Adler (2002) stated that decoherence did not solve the measurement problem. Conclusion There is a serious and unresolved quantum measurement problem. Some, like Ghirardi, Rimini, and Weber (1986), try to solve it by modifying quantum mechanics. If successful, such attempts would result in a theory, distinct from but closely related to quantum mechanics, that is no longer subject to a measurement problem. That problem may be unsolvable (Healey 1998).