Investigation into Stress Capacity

Investigation into Stress Capacity This physics experiment was conducted to investigate stress capacity or known as tensile strength. We had to determine the relationship between the force applied on an object and the extension of the elastic material. The link between the force applied and the extension of the spring is governed by Hookes Law. To establish this connection, we need to measure the relationship between the force applied and the extension. We did this by adding a series of masses, which builds the force on the spring (The Professor, 2016). Hookes Law: When an elastic object is stretched, the expanded length is called extension. The extension of the elastic object is directly proportional to the force applied to it also known as F=kx. F is Force and expressed in Newtons (N). k is the spring constant expressed in newtons per metre (N/m) x is the extension expressed in metres (m). (BBC Bitesize, 2016) A force causes an object to undergo changes, forces that are unbalanced change speed, shape or direction. Gravitational forces are only in effect if there are two or more masses while friction opposes motion (BBC Bitesize,2017). Forces that affected this experiment are: Gravitational Force, Applied Force, Tensional Force. Gravitational Force: A force of attraction between all objects, it depends on the masses of the object and the distance between them. The larger object, the stronger the gravitational force. Applied Force: A force when an object is being pushed or pulled by another object. Applied forces causes an object to undergo changes in acceleration, velocity and direction. The force equation is F=ma. Tensional Force: It is a force that is transmitted through a string, cable, elastic band, rope or a wire. Tensional force is directed along the length of the object when it is pulled by forces from opposite ends. The relationship between stress and strain is known as the stress-strain curve. It is different for each material and is found by recording the amount of deformation at distinct intervals of tensile or compressive loading. Strain is relative change in shape or size of an object due to externally applied forces. This means it becomes dimensionless and has no units. Stress is the internal force (per unit area) associated with strain. It is predicted that the two materials will show different conclusions. I believe that the silicon tube has higher capability of holding larger masses. It depends on the length and thickness of the material. The prediction is that the silicon tube will have the highest stress capacity and wont have a long extension while the elastic band will stretch the furthest but wons have much stress capacity. Equipment Retort Stand Clamp 1 Metre Ruler Mass Hanger Silicon Tube Elastic Band 50g and 100g Masses Notebook and Pen Procedure Setup Retort stand and clamp. To start with, place the material/object on without any stress. Measure the weight of the mass hanger. Measure the length of the material/object. Place mass on it and measure the length to figure out extension Record results on table Repeat step 5, three times for each weight to allow results to be reliable then find average. Keep repeating step 5,6,7 until enough data has been recorded for each material Milan Abraham Elastic Band Mass (kg) Force Original Length 1st Extension 2nd Extension 3rd Extension Average 0 0 14.9 0.061 0.60N 14.9 +1.1 (16) +0.9 (15.8) +1 (15.9) +1 (15.9) 0.161 1.58N 14.9 +1.5 (16.4) +1.4 (16.3) +1.5 (16.4) +1.5 (16.4) 0.261 2.56N 14.9 +1.8 (16.7) +1.7 (16.6) +1.9 (16.8) +1.8 (16.7) 0.361 3.54N 14.9 +2.1 (17) +2 (16.9) +2.2 (17.1) +2.1 (17) 0.461 4.52N 14.9 +2.4 (17.3) +2.3 (17.2) +2.6 (17.5) +2.4 (17.3) 0.561 5.50N 14.9 +2.9 (17.8) +2.9 (17.8) +2.7 (17.6) +2.8 (17.7) Milan Abraham Silicon Tube Mass (kg) Force Original Length 1st Extension 2nd Extension 3rd Extension Average 0 0 72.2 0.061 0.60N 72.2 +2.3 (74.5) +2.3 (74.5) +2.8 (75) +2.5 (74.7) 0.161 1.58N 72.2 +4.3 (76.5) +4.3 (76.5) +4.3 (76.5) +4.3 (76.5) 0.261 2.56N 72.2 +5.3 (77.5) +6.3 (78.5) +5.8 (78) +5.8 (78) 0.361 3.54N 72.2 +7.8 (80) +7.8 (80) +8.3 (80.5) +8 (80.2) 0.461 4.52N 72.2 +8.8 (81) +8.3 (80.5) +8.8 (81) +8.6 (80.8) 0.561 5.50N 72.2 +10.3 (82.5) +9.8 (82) +9.8 (82) +10 (82.2) 0.98 1.4 0.7 The Elastic band and Silicon tube was hung vertically with a mass hanger to the end of the material. Masses from 61g to 561g were added. The length of the elastic band was measured once it was at rest. In this structure, certain forces were in effect. Gravitational force directed the hanging masses downwards. The Applied Force in this case is the masses pushes the elastic material downwards with gravity supporting it.   Restoring Force directs the elastic material upwards, in the opposite direction of displacement. Tension is directed through each material pulling each end. Using Newtons Law the spring constant was calculated for each material. F=ma was transferred into W=mg to calculate gravity. To find the spring constant for the elastic band, mass was turned into dynes. Gravity times mass= dynes. 9836.07 times 0.561 = 5518.04 dynes. Then it is dynes divided by extension(cm) which is 5518.07 divided by 2.8 = 1970.74 dynes/cm which is 1.97N/m. The spring constant for the silicon t ube was which is 0.55N/m. The intercept for the best fit straight line is close to the origin and is also consistent with Hookes Law. To minimise errors, we should have viewed the ruler from specific angles to make sure it was vertical. The scale should be viewed at eye level to avoid parallax error. There were some issues with the retort stand so some equipment was not fit for the experiment and were faulty. In some instances, we needed to make sure that when the person was adding mass, he didnt stretch the material while he was doing it so the results could be accurate. We reduced the decimal places to two so that results could be easy to substitute while being accurate. The hypothesis was predicted to be that the elastic band while have a longer extension than the silicon tube and the silicon tube would be stronger than the elastic band. The prediction wasnt correct as from results it says that silicon tube had a bigger extension which was a surprising result as the material was much thicker. The elastic band had the best result because it showed results that were somewhat predicted and accurate. Through this experiment investigated stress capacity, Hookes Law and certain forces which have influenced the experiment. The hypothesis wasnt as predicted. For this experiment, we determine the spring constant and Youngs Module, we had to interpret the behaviour of two different materials. The results will be analysed to determine what is happening to the materials physically and which one is more capable of the masses. The two types of materials used for this experiment were an elastic band and a tube of silicon rubber.

Birth Order Essay -- essays research papers

Sigmeund Freud was the first psychotherapist to say: "a child's position in the sequence of brother and sisters is of very great significance for one course of his later life" (Richardson 12). One's birth order position (whether born first, second, last, etc.), one's sex (male or female), and the sex of one's siblings affects the kind of person one becomes. People often say they can't understand "how people from the same family can be so different". What they do not realize is that each sibling is born into a different family. Each new child needs to create a unique identity separate from the others. However this new identity is created within the context of those who are already there. The people in a family change in many ways between the birth of each new child. Many variables impact on each sibling. These include the physical circumstances in which a family finds itself, (ie. location, income, residents), the emotional stability of the family, (ie. well adjus ted parents, parental experience, settled career), and lastly the state in which they find themselves, (ie. decade, wartime, country). These variables mean that each child will be treated differently by parents and siblings and this is done usually unintentionally. One must remember that birth order does not determine the basic values of a person or the person's value to society. It affects social interactions more than attitudes and ethnical stances. Your birth order and sex determines in a large part how other people in your family react to you and treat you which in turn influences what you think about yourself and how you react to and treat others inside and outside the family. Your birth order and gender affect primarily your social behaviour and how you relate to other people in your life. They affect the way you relate to your spouse, your friends and the skills you bring to parenting. Birth affects what kind of a spouse you will be because of how you grew up. "It is useful to know that something as simple as birth order can account for major conflicts in a relationship and that neither person is to 'blame'" (Richardson 17). When one understands, for example, that an oldest brother of brothers and an oldest sister of sisters are bound to have conflicts over who is in charge, they can stop blaming each... ...table position is that of the only child which usually takes on the role of a firstborn and then some. Hence, an only child is often referred to as the "Super First Born". "It is a scientific fact proven time and again that your position in your family shapes your approach to life" (Leman 9). Your birth order and sex determines a large part how other people in your family react to you and treat you which in turn influences what you think about yourself and how you react to and treat others inside and outside the family. It should also be noted that birth order not only affects reactions and behaviour. One's birth order affects a plethora of things which include one's IQ, consumption of cigarettes, alcohol and drugs, depression and mental illness, and creativity. (Ernst i - v) The topic birth order has proven to be very interesting and educational. It is amazing and fun to know more about yourself and your siblings through the order in which we were all born. O ne can only wonder how much one's life is out of one's control by virtue of being born first, middle or last. Does birth order really determine who one is or will become or do other factors come into play?

Research Paper on a Tale of Two Cities

Formal Plot Summary Lucie Manette is a central character in the novel. She tends to affect the characters around her in a brightening manor. For instance she mends her father’s psyche through her unconditional love. Because of her ability to affect others in a liberating sense she attracts other characters such as Stryver, Charles Darnay, and Sydney Carton. She also is able to bring light to the life of family friend Jarvis Lorry. Another way Lucie is central is through her constant placement in â€Å"love triangles† the most obvious being Carton and Darnay. A second triangle she finds herself in is between Dr. Manette and Darnay. Sydney Carton is the protagonist of the novel. He dies by the blade of the guillotine to save Darnay. Carton is introduced in the beginning of the novel as an indifferent, drunkard of a lawyer. He seeks no true meaning to life or find pursuit in attaining any future goals. He is a complex character, because he ends up finding meaning, when he falls in love with Lucie Manette. He works early hours for Stryver while wearing sopping towels. He has thrown away much potential, yet he retains sympathy from people by fulfilling a promise to Lucie. Another dimension to Sydney Carton is that he is a social outcast. He has no place in the English class system. Yet, when Carton goes to Paris he becomes a new person. He finds fulfillment in life and in his death. Charles Darnay plays the role of romantic lead. He becomes the love interest and eventually the husband of Lucie. Darnay’s real name is revealed to Dr. Mannette in exchange for his daughter’s hand in marriage—his name is revealed to be St. Evremonde. Darnay is a symbol of sacrifice, when he gives up his home in France to pursue a life in England. He gives up his old privileges to become a tutor of the French language. Dr. Manette spent eighteen years in jail. To keep his mind in prison, he developed a skill in shoemaking. Dr. Manette suffers from spells of amnesia. Throughout the novel Dr. Manette grows as a character. He develops strength and confidence that he had lost in solitary confinement. An example of this is his ability to reason with the revolutionaries to keep Darnay alive. Five years later Charles Darnay is introduced on the stand of a court house. He is being tried for treason. Lorry and Lucie testify to save Darnay, but he saved by his Lawyer Stryver. The case that was made to save Darnay was that he could not possibly be spy because of his resemblance to Sydney Carton—an indifferent lawyer. As this is going on, Darnay, proposes to Lucie. They become engaged. Sydney Carton also reveals his love for Lucie. He understand that he cannot have her, so he promises to give his life for anyone sacred to her. While the marriage ceremony is commencing it is told to Dr. Manette that there were hidden papers found in a prison. This event sends Dr. Manette into shock for several days. Earlier in the day Darnay tells Dr. Manette his true name—Charles St. Evremonde. The French Revolution has now broken out, it is 1789. Defarge has lead an attack on the Bastille while his wife controls the revolutionary women. They burn down everything related with the St. Evremonde name. Gabelle, father of the killed child, is imprisoned. Darnay hears of this tragic event and rushes to France. While he is attempting to help Gabelle, Darnay is seized by revolutionaries as an aristocrat. Dr. Manette has much influence because of his time spent in the Bastille, he is able to visit Darnay, but no free him. Fifteen months later Darnay is brought up before the French Tribunal. As a result of Dr Manette and Gabelles’ testimonies he is set free. As Darnay is leaving, he is rearrested due to the efforts of Madame and Monsieur Defarge. Sydney Carton appears and informs Travis Lorry. Sydney Carton forces John Basard (he once testified against Darnay) to cooperate with him, or he’d reveal Basards illegal maneuvers of spying on prisoners. The following day Carton goes to visit Darnay, drugs him, and takes his clothes. Carton planned on fulfilling his promise to Lucie. Barsard rushes Darnay’s unconscious body out of jail to be with his family and flee safely. Madame Defarge goes to Manette’s apartment to kill Lucie, but meets Miss Pross. Miss Pross fights off Defarge who fires the pistol killing herself. Carton meets the guillotine. He is calm and is optimistic of his death. He dies with a face that is at peace. One major conflict in the novel is between Charles Darnay and his uncle. The conflict is external. There is a fight about Darnay selling the old establishment in France. Darnay’s uncle curses him. There is no resolution to this conflict, but Darnay’s uncle meets his demise when he is stabbed to death by Gabelle. One major internal conflict is between Carton and his inability to pursue any goals. He is revealed as a waste. He becomes the saddest story, when he is born with all the potential in the world but does nothing with it. The conflict is finally resolved when he keeps his promise to Lucie, when he takes his life for Darnay. He is able to come to terms and feel at peace. Sacrifice becomes a central theme in the novel. One example is when Darnay gives up his aristocratic lifestyle to pursue life in England. Another example is Carton when he sacrifices his life in order to save Darnay, so that Darnay can flee the country with Lucie. Another obvious them in A Tale of Two Cities is love and hate. An obvious example of love is Miss Pross protecting Lucie’s life by fighting off Madame Defarge. Miss Pross risks her own life to save another. The best example of love is Carton’s promise to Lucie. In order to promise his life to Lucie, he had to love someone more than himself. An example of hate is Madame Defarge’s attempts to kill those who had relations with Darnay. She wanted vengeance, which is a byproduct of hate. Her hate for aristocracy drives her to almost successfully getting Darnay killed by the guillotine. Another major theme which should be mentioned is death. Carton has to die in order for Darnayto live. Throughout the novel there is speak of death and violence. There were multiple descriptions in the novel of death by guillotine and scenes of the bloodshed due to revolutionary violence. One example I was able to clearly recognize was the guillotine. It symbolized death. Such as when it killed Carton. It also symbolized revolutionary violence. Evidence of this was whenever speak of revolutionary actions were shown, the guillotine was mentioned. Another example was Madame Defarge’s knitting. She would knit the names of the people she desired to kill. It was a symbol of their fate. Her knitting was a symbol of fate because every time she knitted someone’s name into her pattern, they would be marked to die. My personal reaction to the book was that it was very complicated to understand. Dickens’ word usage made simple sentences much too complicated to understand. I had to read the book with a dictionary. It took me from anywhere between twenty and thirty minutes to read eight to nine pages. Although I struggled much with the novel, I enjoyed it. My research paper will be concentrated on the complexity of Sydney Carton. He constantly changed my view of him in the novel. At one point I might dislike him, but then in another section I gained understanding for him. I feel that I will be centering my thesis on paralleling the lives and views of both Sydney Carton and Charles Dickens. Works Cited Dickens, Charles. A Tale of Two Cities. New York: Cassia Press, 1998.

history of the Internet essays

history of the Internet essays To know the history of the Internet it is very important, to know: what was the original goal to create Internet, what were the steps that had to be taken and who were the main players. In 1973, the U.S. Defence Advanced Research Projects Agency (ARPA) initiated a research programs to investigate techniques and technologies for interlining packet networks of various kinds. The objective was to develop communication protocols, which would allow networked computers to communicate transparently across multiple, linked packet networks. This was called the Interning project and the system of networks which emerged from the research was known as the "Internet." The system of protocols which was developed over the course of this research effort became known as the TCP/IP Protocol Suite, after the two initial protocols developed: Transmission Control Protocol (TCP) and Internet Protocol (IP). Invention of the Internet. (ARPA) Advanced Research Projects Agency was an agency of U.S. Department of Defence, (ARPA) the emphasis was towards research, thus was not oriented only to a military product. The formation of this agency was part of the U.S. reaction to the launch of sputnik by Soviet Union in 1957. ARPA was assigned to research how to utilize their investment in computers via command and control Research. Two of the main goals of ARPA were: 1) To find a way to allow scientists at different locations to share information and collaborate on military and scientific projects. 2) To make sure if even part of the network were disabled r destroyed by a disaster such as nuclear war, that the network would still function. (ARPA) awarded Bolt Beranek and Bewman a contract to design and deploy a packet switching network. This project was called ARPANET. TCP/IP was developed by Department of Defence (DOD) research project to connect a number of different networks designed by different vendors into a network. And this led to the up come of ...

Salem Witch Trials and Puritan Community Essay Example

Salem Witch Trials and Puritan Community Essay Example Salem Witch Trials and Puritan Community Paper Salem Witch Trials and Puritan Community Paper Arthur Miller, many lies have been made by the Puritan Community. The witch trials took place during the times of the Salem In Massachusetts. This was a time of much hypocrisy in the people of the town of Salem. The witch trials involved many people to lie about the devil and witchcraft, which also harmed others in many ways. The Puritans of Massachusetts were a religious faction. Miler involved the Intense dishonesty over the Puritan Community. The story began with the dancing of the girls In the forest. These girls were: Ball Williams, Tuba, and Betty Pearls. When the girls were seen they became scared and ran off. This Is what led to the uprising In the town. Many people believed anything they heard or saw. They believed In an unconditional election In which God has no obligation to save anyone, no matter how little the problem is. The Puritans use this during the witch trials in which they hanged many people that were innocent of witchcraft. These hangings happened because everyone believed everything the girls said and showed. People in the crowd seemed awe struck by the girls and their ability to view people as witches or not. These hangings produced hysteria in the townspeople. In the story because of the dancing of the girls the priests of the town, Hale and Paris believed that the girls called the devil upon their town. Many people are accused of witch craft because of the girls. Abigail instigated her problems by lying, in order to avoid punishment and to remain an accepted member of the community. Author Miller described that she has, an endless capacity for dissembling. (9) She started out by trying to convince her uncle, Reverend Paris that she never participated in any acts of witchcraft. She deed an excuse for Betty, her cousin, who was lying unconscious in bed. She explained to Proctor, Oh, posh! We were dancing in the woods last night, and my uncle leaped in on us. She took fright, is all. (22) Mary Warren suggested that they confess everything so that they will Just get whipped rather than hung. When Abigail heard this, she said, Oh, well be Abigail said this because she was planning on saying or doing everything In her power to stay alive. When the girls supposedly brought Satan upon their town the people got frightened and the only way to get rid of the demons In the town Is through several hangings. The girls was the link between the people they could see Satan and the people that followed his work. Through the stories the girls lied about what they saw this should not have happened. The girls took their tear out on the people of the town and they did not even realize it. Salem Witch Trials and Puritan Community By Abyssinian Puritan Community. The witch trials took place during the times of the Salem in religious faction. Miler involved the intense dishonesty over the Puritan Community. The story began with the dancing of the girls in the forest. These girls were: Abigail Williams, Tuba, and Betty Pars. When the girls were seen they became scared and ran off. This is what led to the uprising in the town. Many people believed anything they heard or saw. They believed in an unconditional election in which God heard this, she said, Oh, well be whipped! (19) Abigail said this because she was planning on saying or doing everything in her power to stay alive. And the only way to get rid of the demons in the town is through several hangings. Not have happened. The girls took their fear out on the people of the town and they

The Effect of Heroin on Pregnant women Essay Example | Topics and Well Written Essays - 1500 words

The Effect of Heroin on Pregnant women - Essay Example eroin, Marijuana, Brown sugar and others have adverse and harmful side affects and it is doubly harmful for any pregnant mother as it spoils her health. Once addicted to a drug, a person finds it extremely difficult to get over it and even if he or she Many pregnant, addicted, substance abusing mothers suffer tremendously when they go through withdrawal symptoms during later pregnancy and child birth. Initially when the drug is taken by a person, it makes them feel heavy and drowsy. They are hardly conscious of their surroundings and very often go into delirium. (Bauer, C.R., et al. September, 2005) Heroin affects the nervous system, making the person’s mental responses slow and clouded. Their breathing becomes heavy and slow and the Cardiac function slows down very much, sometimes to the point of death. Withdrawal symptoms are extremely difficult to go through. During this period, the mother experiences, extreme craving for the drug, and if left alone, can use it once again. The mother undergoing these symptoms is irrational and exhibits irritability. She becomes moody and throws a lot of frustration around. She has sleep abnormalities and The addicted pregnant mother experiences all this, in addition to severe hormonal imbalance which adversely affects the growing fetus in the mother’s womb. The results of such an experience, is fatal to the unborn child and may damage the fetus for life. Though it is quite a difficult task to treat addiction, yet there are ways and means that a person can get over his or her addiction. Treatment can be done in two ways. The person can be treated as an out – patient or in the very severe cases it is better to treat the addiction if she is an in- patient. For pregnant mothers addicted to heroin, it is better for them to be treated as in – patients because they can be always under the watchful eyes of the physician or nurse who could help immediately if things did not go quite right. Illicit drugs such as Heroin,

Computing;object oriented modelling Essay Example | Topics and Well Written Essays - 1000 words

Computing;object oriented modelling - Essay Example Software having a large amount of programmers and developers associated with it are bound to cause confusion if their processing life cycle is not properly documented and diagrammed. Object Oriented Modeling is used during the requirements analysis and design phases of a software life cycle to properly document the features that are expected from the software. 90% of process modeling is done in the object oriented fashion due to its wide acceptance. When object oriented modeling was first introduced it was the target of a lot of criticism and a lot of languages claimed to be perfect for it. Later, UML (unified modeling language) was accepted as a standard. UML is a standard for object oriented modeling. Therefore, Object oriented modeling is a design technique used to model different objects (entities) participating or interacting with a system. After understanding what object oriented modeling is all about we must strive to answer the question whether it is worth spending time doing it. The basic reason for creating a proper documentation is to facilitate software reuse. Software reuse could be defined as , â€Å"placing reusable chunks of software on a shelf in a reuse library and then hoping that someone will later reuse these already written, already tested, already commercially hardened chunks of code in other applications, with great savings in cost and time.† (â€Å"Software Reuse and Software Product Lines† by http://www.biglever.com/technotes/reuse_spl.html?source=reuse) During the course of development of Information technology, IT professionals have realized that if software are developed systematically and not in an ad hoc fashion then their different modules could be used to facilitate different other software developments as well. Object oriented modeling could be an important tool for software reusability. Two factors make object oriented modeling really useful in the reusability of different software components. (â€Å"Going beyond