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Dispersal and Regrouping of Migrant Communities Essay

Dispersal and Regrouping of Migrant Communities - Essay Example Diasporas are only gatherings that vagrants structure based on a common c...

Saturday, May 23, 2020

Torque Kinetic Energy - 5318 Words

WHAT IS TORQUE? Torque is a measure of how much a force acting on an object causes that object to rotate. The object rotates about an axis, which we will call the pivot point, and will label O . We will call the force F . The distance from the pivot point to the point where the force acts is called the moment arm, and is denoted by r . Note that this distance, r , is also a vector, and points from the axis of rotation to the point where the force acts. (Refer to Figure 1 for a pictoral representation of these definitions.) | Figure 1 Definitions | Torque is defined as = r x F = r F sin(). In other words, torque is the cross product between the distance vector (the distance from the pivot point to the point where force†¦show more content†¦Second, you should grab onto the end of the lever, and not a point near its axis of rotation. Third, you should lift in a direction that is perpendicular to the lever: if you pull very hard away from the wall or push very hard toward the wall, the lever won’t rotate at all. Let’s summarize. In order to maximize torque, you need to: 1. Maximize the magnitude of the force, F, that you apply to the lever. 2. Maximize the distance, r, from the axis of rotation of the point on the lever to which you apply the force. 3. Apply the force in a direction perpendicular to the lever. We can apply these three requirements to an equation for torque, : In this equation, is the angle made between the vector for the applied force and the lever. Torque Defined in Terms of Perpendicular Components There’s another way of thinking about torque that may be a bit more intuitive than the definition provided above. Torque is the product of the distance of the applied force from the axis of rotation and the component of the applied force that is perpendicular to the lever arm. Or, alternatively, torque is the product of the applied force and the component of the length of the lever arm that runs perpendicular to the applied force. We can express these relations mathematically as follows: where and are defined below. Torque Defined as a Vector Quantity Torque, like angular velocity and angular acceleration, is a vector quantity. Most precisely, itShow MoreRelated Angular Momentum Essay1430 Words   |  6 Pagesbecause of its mass and motion. Angular momentum is possessed by rotating objects. Understanding torque is the first step to understanding angular momentum.Torque is the angular version of force. The units for torque are in Newton-meters. Torque is observed when a force is exerted on a rigid object pivoted about an axis and. This results in the object rotating around that axis. The torque ? due to a force F about an origin is an inertial frame defined to be ? ? r x F1 where r is the vectorRead MoreScience in a Lacrosse Shot Essay1319 Words   |  6 PagesPhysical Requirements). Shear commenced a 3-D biomechanical study to show the physical fundamentals behind a flawless lacrosse shot. Lacrosse involves a complex rotary motion entailing a kinetic linking from your feet to your arms. Kinetic linking is associated with kinetic energy. Kinetic energy is â€Å"the form of energy contained in an objects motion† (Bloomfield, 31). Each body segment is a â€Å"link in the chain† (i.e. hips, arms, stick, etc.). In preparation for just the right shot, a good player needsRead MoreEssay on Physics of Bowling909 Words   |  4 Pagesfour aspects of bowling that can be explained with physics terms and show you how to use this knowledge to optimize your game. Gravitational Potential Energy Depending on the height from which the bowler drops the bowling ball, the ball will have a certain amount of potential energy. If the bowler bowls with a straight ball, the potential energy of the ball will not affect their game very much. It will, however, draw attention to the bowler when they drop the ball sufficiently high as to broadcastRead More Catapulting though Time Physics Essay2329 Words   |  10 Pagesand other objects that hurl projectiles, also seem as old as human civilization itself. The effectiveness of the catapult in flinging objects over a great distance and causing destruction is due to a few basic physics principals that govern force, energy, motion, speed and mass to name a few. The design of the catapult denotes a change in modern warfare to the engineer behind weapons being just as important as the actual soldiers and people who use them. Projectile-throwing machines are foundRead MoreChanging the Momentum of a Ball766 Words   |  3 Pagesamount of kinetic energy a ball possess after collision. The ball that is travelling down the ramp with a slightly higher angle, will possess more kinetic energy before collision but after collision it will posses less kinetic energy because of it being an elastic collision where energy is conserved and transfers some energy to the ball travelling down the less steep ramp with less momentum. Therefore the ball travelling down the ramp that is not as steep will possess more kinetic energy after collisionRead MoreEssay on The Physics of Bowling1766 Words   |  8 Pages The definition of physics by some may be the science that deals with matter, energy, motion, and force. Therefore everything in the world uses physics in some way or another. One of the numerous things that deal with physics is bowling. Some of the major parts of physics bowling has is the motions, the ways that Newton’s laws apply, the different momentums, and the energy. Other physics topics include torque, pendulum theory and collisions. In the motion of bowling many things are goingRead MoreMass and Kinetic Energy Essay964 Words   |  4 Pagesuniform disk of radius R = 0.25 m has a string wrapped around it, and a m = 3 kg weight is hanging on the string. The system of the weight and disk is released from rest. a) When the 3 kg weight is moving with a speed of 2.2 m/s, what is the kinetic energy of the entire system? KETOT = KEwheel+KEweight = (1/2)(I)(w2)+(1/2)(m*v2) =(0.5* v2)(m+1/2M) =0.5*(2.2^2)*(3+(.5*15)) J b) If the system started from rest, how far has the weight fallen? Read MoreThe Physics of Golf Essay3575 Words   |  15 Pagesgolf club. Two men are most influential in this area of study, Galileo Galilee and Isaac Newton. It is the principles of these two men that will be used during the discussion of the physics of golf. A brief explanation of momentum, moment of inertia, torque, centripetal force, and centrifugal force can be located in Appendix 4. These terms were derived from the experiments and research of first Galileo, and then expanded upon by Newton. Although neither of these two men are solely responsible for allRead MoreEnergy From Track s Vibrations For Safety And Monitoring Using Aurdino Controller Which Will Improve Rail Road Accidents1233 Words   |  5 Pages 1.2 Objectives and Aims The main objective is to recover energy from track’s Vibrations for Safety and Monitoring using Aurdino controller which will Improve Rail-Road Accidents. The proposed harvester is designed to power major areas where there is no proper maintance of electricity. The different equipments usually need a power supply of 10-100 Watts, for example generating warning signals, switches and health monitoring systems. 1.3 Literature Review The first step taken in this projectRead More Physics Of Bowling Essay1188 Words   |  5 Pagesthe net force. When my fingers leave the hole, it’s accelerating. Now, how fast it goes is determined on how fast you swing your arm and let go. Now that’s all Durbin basically said on bowling. But I realized that Newton’s Laws, momentum, kinetic and potential energy all have their role in bowling too. Durbin was correct when he explained acceleration. Let me tell you a little something on acceleration. Acceleration is the rate at which the velocity is changing. Because acceleration is a rate, it

Tuesday, May 12, 2020

Bitter Love Quotes

Love is like dark chocolate. Although it can leave you with a bitter taste in your mouth, you will still be tempted to take a bite the next time around. Many writers have tried to put the bitter experiences of love into words and some have done an exceptional job of it. Here are 21 bitter love quotes that bring out the bleakness of love. Bitter Quotes From Famous People Mother TeresaLoneliness and the feeling of being unwanted is the most terrible.Ben HechtLove is a hole in the heart. Pearl Bailey  The sweetest joy, the wildest woe is love. James BaldwinThe face of a lover is an unknown, precisely because it is invested with so much of oneself. It is a mystery, containing, like all mysteries, the possibility of torment. W. H. AudenHe was my North, my South, my East and  West,My working week and Sunday rest,My noon, my midnight, my talk, my song;I thought that love would last forever:I was wrong. Maureen Duffy  The pain of love is the pain of being alive. It is a perpetual wound. William M. Thackeray  To love and win is the best thing. To love and lose, the next best.Johann Wolfgang von GoetheIf  I love you, what business is it of yours?ConfuciusCan there be a love which does not make demands on its object?Henry Wadsworth LongfellowIf I am not worth the wooing, I am surely not worth the winning.S. JohnsonLove is the wisdom of the fool and the folly of the wise. Kahlil Gibran Ever has it been that love knows not its own depth until the hour of separation. Margaret MitchellI was never one to patiently pick up broken fragments and glue them together again and tell myself that the mended whole was as good as new. What is broken is broken, and Id rather remember it as it was at its best than mend it and see the broken places as I lived.   Anais NinLove never dies a natural death. It dies because we dont know how to replenish its source. It dies of blindness and errors and betrayals. It dies of illness and wounds; it dies of weariness, of withering, of tarnishing.Samuel Butler  It is better to have loved and lost than never to have lost at all. Anonymous Bitter Love Quotes AnonymousTo fall in love is awfully simple; to fall out of love is simply awful. Anonymous  Love is like heaven, but it can hurt like hell.Anonymous  Love is like war: easy to begin but hard to end.AnonymousI never felt true love until I was with you, and I never felt true sadness until you left me.AnonymousLove begins with a smile, grows with a kiss, and ends with a teardrop.AnonymousNo matter how badly your heart is broken, the world does not stop for your grief.

Wednesday, May 6, 2020

Life Span Perspectives Paper Free Essays

In order to truly understand the life span perspectives we must first define developmental psychology, which is a field that falls under the topic of psychology that is centered on describing how individuals change and grow throughout the stages of their life. This field has also been noted to be one of the more popular fields to be studied. We, as humans, must first grasp the concept that before there can be an outcome there has to be a process or a beginning. We will write a custom essay sample on Life Span Perspectives Paper or any similar topic only for you Order Now We can always trace anything that exists back to a beginning, for people this beginning is birth and the developmental processes that follow are individual pieces of the life processes. Charles Darwin had a longing to understand just what evolution was and exactly how it worked; from this desire he drew the study of lifespan development. Adolescence and norms were first introduced to those in the field of science by way of a G. Stanley Hall publication (Boyd Bee, 2006). Within this book these scholarly individuals could read about the first observational studies of children. Within this paper you will find the definition of lifespan development, a description of the many characteristics of the lifespan perspective, and the identifying factors of the human developmental domains and periods. Lifespan Development We recognize that within the lifespan there had to be a beginning; we know this because of the work of Charles Darwin. Darwin began the inner workings of human developmental studies and those early evolutionists who shared his opinions were soon to join in his studies. Darwin’s goal was to prove his theory of evolution; it was his belief that his best chance of proving his theory was to engage in intense studies of human development (Boyd Bee, 2006). According to the American Heritage Dictionary, a lifespan is the average amount of time that an organism, material, or object can be expected to survive or last. If we look for further detail and look for the definition of development, we find that development based on biology is the process of organic growth in an individual organism, we also see that this an be defined as a biological occurrence of events in which an organism changes gradually from a simple to a more complex level (Collins English Dictionary, 2003). When we combine these two individual words we end up with a term that defines the individual changes associated with life progresses that can be tracked in correspondence to the individual’s age. People will change many times over throughout their lifetime; these developmen tal periods are the prenatal period, infancy, childhood, adolescence, and adulthood. In order for one to experience growth developmental change must occur. Life span development will occur over and over, again and again throughout the individual’s life time. Although there are positives and negatives in the developmental process, developmental research and advances will continue to occur throughout an individual’s entire life cycle. Characteristics of the Lifespan Perspective All individuals develop on their own schedule and at their own pace, depending on many internal and external factors. Due to improved nutrition and health and medical knowledge a sharp rise in the average life expectancy has recently been observed. The characteristics of the lifespan perspective are lifelong, multidirectional, plasticity, contextual, multidisciplinary, and multidimensional. One’s development continues throughout their lifespan, there is no certain age that appears to be heavier in this area than others. Continued growth paired with decline affects development which can be said to attribute to the multidirectional portion of the lifespan. Many will seem to focus on the plasticity of the human lifespan, one can see this in the example of a child who has been malnourished, this child may suffer from a diminished intellect but given proper nutrition over an extended period of time the child will, indeed, regain much f the lost function and should eventually catch up to the average for his age. There are many outside forces that have a great effect on human development, these forces can be biological, historical, social, and cultural (Berk, 2007). Lifespan Domain Human Development domains all work together and are affected by one another. The categories of the domains of development are social, physical, and cognitive (Boyd Bee, 2006). The social domain encases the changes that one may find necessary in order to adapt to a new social environment, or situation, this might include developing and maintaining relationships, and improvement upon general social skills. The physical domain can be defined as the way the humans change their physical appearance. A good example of a physical change is when a child enters puberty, and again as the child becomes elderly. Within this domain it is seen that as the physical appearance changes so will the views that the individual possesses in life. Human Development Periods Psychoanalytic, cognitive, and learning are the three theories that have been shown to produce the most information on human development (Boyd Bee, 2006). Within these theories we can find information that best explains how one transitions from one moment within their life and essentially evolves to the next level. In discussing human development we must recognize the age old debate of nature versus nurture. Within this theory we must ask which, if either, is truly the strongest influence? Does the environment or genetics play the biggest part in this factor? Conclusion There are many answers that are yet to be discovered in the field of psychology in spite of the fact that there have already been so many discoveries. In the beginning there was Darwin and his theory of evolution†¦.. we do not yet know where the end may take us. How to cite Life Span Perspectives Paper, Essays

Sunday, May 3, 2020

Perception and Attention Paper free essay sample

Perception and Attention Paper In the exploration of cognitive psychology, the theory of cognitive processes has been brought to light. These processes could include attention, memory, perception, sensory, and visual perception. Memory is composed of different factors such as short-term memory, long-term memory, screen memory, remote memory, replacement memory, and immunologic memory. Visual perception deals data intake from a visual standpoint. The five senses, touch, taste, smell, sight, and hearing also time into the cognitive process. Perception gives an individual the ability to have insight into any given situation. This is also how an individual can gain knowledge or intuition. On the other hand, there is attention, which gives an individual to ability to focus mentally. While each concept is equally important to cognitive processes, this will paper will explore perception, attention, and the relationship between the two. Define the concept of perception Let thinks about all the things around us and how we look at them on a daily basis. When thinking about perception an individual should think about all their senses, these senses involve the ability to become aware of the changes within one’s body and mind. As you travel, you may see objects that cause you to think of various things in your life. Think about the touch of objects, the smell of various aromas the may remind you of a home-cooked meal and different types of music playing can also have an affect on a individual differently. All of these things help create a conscious familiarity and allow one to connect with the people and objects around us. However, these perceptions vary from individual. Therefore, many individual see and recognize thing for various prospective when looking at identical thing or situation. Moreover, the suggestion might not be the same to each individual. When looking at one individual’s perspective there might be a considerable change to the meaning to someone else. The flowing together of complex sensory inputs often a time creates a perception that is unreliable or unverifiable. In other words, it is based in reality (Robinson-Riegler, 2008). Breaking Down the Perceptual Organizational Process The perceptual organizational process is, according to Ruth Kimchi (2009) as the processes that create visual information into understanding units. Visual attention is the method that forms illustration information in a picture chosen. The selection chosen are important for the ability to form an opinion of his or her imaging surroundings and visuomotor, which is relevant to connecting images and motor processes. The motor process is the part that deals with movement, letting the body knows that the mind has the body’s attention. Define the concept of attention The processes that allow us to perform these dynamic cognitive operations on the information that held awareness include what referred to as working memory (Robinson-Riegler, 2008). Robinson-Riegler (2008), states that attention is limited, and that an individual cannot possibly process everything that heard. If we stop and think about it, has there ever been a time where we remember everything that we have heard or seen. It is hard enough to focus on what done, so if we are looking at our surroundings and not paying attention to what done, than we will probably not do a good job at what we are doing. It is also known that attention is considered to be flexible in a way that individuals can change from initial modes of attention to late modes (Robinson-Riegler p6 2008). Every individual has the control of how their incoming information processed in a way that they can decide the information they want processed. There are two types of attention divided attention and selective attention. In divided attention, Robinson-Rielger (2008) describe it as tasks that consist of the processing of multiple inputs, where selective attention involves choosing one input to process at the expense of others. An example would be parents who are constantly doing more than one thing at a time, whether it is cooking, changing diapers, or even picking up after their children. In selective attention, it is referred to as keeping an individual from being distracted and having them focus. For example, a student is trying to study in the library but cannot seem to focus due to the copier going off and people talking. The student knows the studying has to be done, so therefore finds way to block out all the noise. Attention is very important for everyone to understand; once an individual has, a better understanding of how they handle their attention span it will be easier for them to function in their everyday lives. Analyzing the Nature of the Attention Process The nature of the attention process is easy to comprehend; attention is the result of identifying the stimuli, be it a sound, object or image. According to Yeshurun, Kimchi, Sha’shoua, and Carmel (2007) researchers have demonstrated that perceptual organization has an effect on the routine, stimulus-driven operation of attention. For example, if an object flew extremely fast by a window, the onlooker would assume the object is a bird or a plane. The sound, whether a chirp or a hum the object made, finishes the determination of the object. In another light of attention, for example, when people required to take visual tests to obtain his or her driver’s licenses. Flashes of stars may show in different points of the screen: above, beneath, middle, and center. A reason for attention star’s movement is to see if the potential driver can hold his or her attention while driving. The other reason is to see how well the driver’s vision is. Perception and Attention Attention serves as the foundation for the beginning of an individual’s perception. The span of people’s attention is either spatial or object-based when using visual cues for perception (Robinson-Riegler and Robinson-Riegler, 2008). Spatial visual attention refers people paying attention to the space in front of them. Object-based visual attention refers to the focus on particular objects and the importance given to these objects within a scene. Visual attention brings information into focus for the people to draw conclusions from and behave correspondingly. Visual attention depends on the value people give to incoming visual stimuli. For example, when told to focus on one aspect of visual cues people may look over other aspects of the visual scene because of the inability for individuals to process all visual cues of an environment simultaneously. Inattentional blindness refers to things unfocused on in the scene and attentional capture refers to those things that are perceived by the individual (Robinson-Riegler and Robinson-Riegler, 2008). Visual stimuli combined with auditory stimulus presents a variety of ways to capture an individual’s attention. Auditory attention presents in the same manner as visual attention. People are presented with an auditory stimuli, the outcome of response is based on what characteristics attention given to the auditory stimuli. Several theories exist explaining the process of attention in receiving auditory stimuli. One is the early selection theory where information is received and filtered by a selection process by which the received information is processes (Robinson-Riegler and Robinson-Riegler, 2008). Attenuation theory refers to the process by which audible stimuli is still possibly received even when individuals attention is caught somewhere other than the exact stimulus (Robinson-Riegler and Robinson-Riegler, 2008). Whether people are aware of the auditory stimulus or not the information still passes into a degree of awareness to be later used or recalled. The information is obtained in memory because of an individual’s stored information that recognizes the auditory stimulus. Researchers also developed the late-selection theory to account for the process of audible stimuli catching ones attention when it appears to have done so. Late-selection theory states individuals perceive all audible stimuli; however, not all information receives the same attention (Robinson-Riegler and Robinson-Riegler, 2008). The information unattended to is then held in the individual’s consciousness to be used or retrieved when the individual finds a use for the information. If the information is meaningful the person perceives it. Attention strengthens the degree to which people perceive information; however, perception also occurs in the face of unconscious awareness. People perceive information despite not having consciously directed their attention toward the stimulus. Numerous studies indicate that perception occurs without awareness although the ability to recall information or the true validity of the information is obscured in some form (Merikle, Smilek, and Eastwood, 2001). Individual perception depends on the valued information observed by the individual whether visual or audible. The attention to information is what provides the ability for individuals to make perceptions about their environmental stimuli. From the information provided it is understood that perception and attention are important concepts to cognitive processes and development. It can be said that are closely related and can rely or support each other. Individuals are in control of how they feel and react in any given situation. Such feelings and reactions can dictate perception and the attention that is given to the situation at hand. One should also understand the environmental impact that can tie into these cognitive processes. References Merikle, P. M. , Smilek, D. , Eastwood, J. D. (April, 2001). Perception without awareness: perspectives from cognitive psychology. The Cognitive Neuroscience of Consciousness, 79(1-2), 115-134. oi: 10. 1016/S0010-0277(00)00126-8 Robinson-Riegler, G. Robinson-Riegler, B. (2008). Cognitive psychology:Applying the science of the mind (2nd ed). Boston, MA: Pearson/Allyn and Bacon Ruth Kimchi (2009) Perceptual organization and visual attention, Prog Brain Res. ; 176: 15–33, Doi: 10. 1016/S0079-6123(09)17602-1 Yaffa Yeshurun, Ruth Kimchi, Guy Sha’shoua, Tomer Carmel (2007) Perceptual objects capture attention, Department of Psychology, University of Haifa, Haifa 31905, Israel http://dx. doi. org. ezproxy. apollolibrary. com/10. 1016/j. visres. 2008. 01. 014