The specific heat cpacity of the substance Essay Example for Free

The specific heat cpacity of the substance Essay Advanced Physics; Materials and Mechanics 2nd Edition By John Murray Ltd 1983 Provides depth information on Specifics Heat Capacity and specific heat capacity for varies materials Revise As Physics for OCR By David Sang 2001 Provides the equations to calculate Power and Energy Cambridge Physic 2 By David Sang 2001 Information about specific heat capacity and how to work out specific heat capacity Nuffield Advanced Science Book Of Data By Longman Group Ltd 1998 Contained the actual specific heat capacity for ethanol and all other substances. WEBSITES www. atlans.org/elements/heat/ol 02-Feburary-2002 This websites gives information on the laws of thermodynamics, Entropy and internal energy www. physics. about. com/library/dict January-2002 This website provided information about internal energy and entropy. MODIFICATION In my method I had originally planned to take thermometer reading after every 2 minutes but when testing the equipment and took the readings I found out the temperature rose rapidly and was unable to obtain sufficient readings that would produce a graph, so decided to take readings after every 1 minute. To prevent heat loss I had planned to use a layer of wool to wrap around the beaker but decided to add more layers of aluminium bubble wrap to keep heat loss as minimal as possible. THE RESULTS Implementing: When I finished testing the equipments the heater was still hot which would have meant the next experiment would have had unfair testing conditions. To resolve the problem I dipped the heater in cold water for 7 minutes to cool it off and placed on the table for further 3 minutes gain room temperature. During the first experiment, the thermometer that I was using had a scale reading from -5 to 100, which made it very difficult to obtain accurate reading. To minimise error with readings I used the same size thermometer but with a smaller scale reading from -5 to 50, that was much easier to see the temperature. The final condition to change from original plan was that I used a glass lid apart from using a rubber lid to cover the beaker. This was because when rubber lid is used the thermometer could not be viewed without being lifted up but with glass lid, eliminated the need to move around the thermometer to see the temperature. CONCLUSION Resulting from the three experiments, I was able to work out average for the energy used and temperature, which I used to work out the temperature rise. To be able to analyse the results properly and accurately I decided to plot a graph using the average temperature rise against energy used. When I plotted the graph, the out come of the results was a straight line when I drew a linear line of best fit. The out come of my graph agrees with my prediction, which stated that the results should produce a straight line on the graph and it would not go through the origin in the real world. To be able to work our the specific heat capacity I had to draw a gradient on the graph and use the value from it: c = Energy Mass   Temperature Change Using the gradient, we get:This value agrees with my prediction that the value will be between 2000 and 3000 and to be much lower than the specific heat capacity of water. The specific heat capacity that was produced by the gradient, 2353Jkg- K- is only 57 away from the actual specific heat capacity of ethanol, which is 2410Jkg- K- . If both values were to be rounded to two significant figures the values would be exactly the same (2400Jkg- K- ) which shows how close how close the value i worked out is to the real value. The Fact that ethanol is a liquid but has a significantly lower specific heat capacity compared to water this can be explained by the fact that ethanols is more dense than water and its particles are much closer together than those of water which makes it easier for heat to be conducted easily by particles in ethanol. This also explains why the boiling point of ethanol, (78. 3 c) is lower than that of water which is 100 c and this also supports my understanding and prediction that ethanol requires less heat than water. EVALUATION The experiment procedure that I chose for my investigation is reliable able minimised the margins of errors. This is supported by the fact that all my results were all on of very close to the line of best fit on the graph. The fact that when I used error-bars they were all being touched by the line and the R^2 value is 0. 9982 and no anomalous results strongly suggest that the procedure was reliable. The fact that there are no anomalous results and the R2 value is very close to 1 means that the measuring equipments and technique were very accurate and this is supported by the fact that the all observation all produced readings which are very similar to each other which helped to obtain good averages. The fact that I used a joule meter a part from using voltmeter and ammeter then working out the energy myself eliminated any calculation errors. Even though the measuring techniques and equipments helped produce reliable results, there are still errors in the experiment because the line didnt go through the origin and the value that I worked out for the specific heat capacity is a bit less compared to the actual value. The procedure I used produced errors, which affected the whole experiment. The errors that caused by the procedure are that the all the electrical heating was not all used to heat ethanol because some heat had escaped through convection, as the air in the room was cooler. Some energy was used to heat up the heat, heat up the beaker and thermometer. The fact that the lid did not cover the whole top because of the gaps for the heater and thermometer was being converted to the cooler air in the room. The limitation from the experiment that stopped me from obtaining a value that is 100% accurate was the heat loss through convection and these can be improved by using a lid that covers the entire top and the gaps for thermometer and heater dont have any space for air to enter or escape. The fact that some heat energy goes towards heating up the equipments, the equipments should be kept in a temperature that when any electrical energy is given it will all be used to heat up the ethanol and beaker to be wrapped with good insulators so any heat conducted to the beaker will not escape. Doing all these will decrease the amount of heat that is being used in other way than heating the substance. The main sources or errors would be the taking and recording of the readings. I had to observe and record both readings every minute, which meant that some records were few seconds late or early. This explains the reason the experiments producing minor differences when repeated. The way to overcome this problem is to have three people taking single reading and these would increase the accuracy of the results.

Responsibilities Essay -- essays research papers fc

Life is full of adventure and triumph, but sometimes the grass is not greener on the other side. Sometimes many sacrifices must be made in order to accomplish our own goals. We may all have duties that we have to deal with just to make it by, but we can acknowledge them through our personal experiences. In, Of Mice and Men, John Steinbeck creates symbolism through George's journey leading him to the eventual realization that everyone has responsibilities. Many themes occur throughout the novel, but one can apply to everyone: we all have tasks we must perform in order to achieve a better life. Initially, this theme becomes apparent through Candy and his dog, "' That dog ain't no good to himself. I wisht somebody'd shoot me if I got old an' a cripple'" (Steinbeck 45). The theme is you gotta do what you gotta do. Candy recognizes that it is his responsibility to put down his dog. It is the same with George when he has to kill Lennie: he knows that he will miss him, but he also knows that it must be done. Similarly, one critic agrees that actions such as, the dog being shot out of Candy's compulsion, predict the future demise of Lennie (Lisca). Lennie does not understand why certain things cannot be done and it only causes trouble for him. George comprehends his duty towards society, and the sacrifice that must be made in order to achieve his own utopia. Our own duties can become clear when we relate to this conceptual them e. ...

Human Development Essay

Human development is marked by different stages and milestones over the lifespan. It is expressed over three domains: physical, cognitive and socio/emotional. While human physical and cognitive development is universal, socio/emotional definitions and development vary from culture to culture. The various stages of human development include the prenatal period, infancy, toddler hood, early childhood, middle childhood, adolescence, young adulthood, middle adulthood and late adulthood. Each stage is marked by milestones in physical, cognitive, and socio/emotional development. The theorist that investigated about middle adulthood was Erik Erickson. Erikson observed that middle-age is when we tend to be occupied with creative and meaningful work and with issues surrounding our family. Also, middle adulthood is when we can expect to â€Å"be in charge,† the role we’ve longer envied. The significant task is to perpetuate culture and transmit values of the culture through the family and working to establish a stable environment. Strength comes through care of others and production of something that contributes to the betterment of society, which Erikson calls generativity, so when individual in this stage they often fear inactivity and meaninglessness. As children leave home, or relationships or goals change, they may be faced with major life changes—the mid-life crisis—and struggle with finding new meanings and purposes. If adults do not n get through this stage successfully, they become self-absorbed and stagnate. The main features of midlife refer to the transformation and progress on physical, cognitive/intellect and social domains. Changes are also evident on expertise and personality. Physical change is the most gradual. Such changes include, atrophy of muscles, slower metabolism, skin elasticity and dryness, wrinkles, slow growth of nail and hair and baldness. These changes also facilitate the decrease in height, increase in weight and decrease in bone density, strength and immunity, vision and hearing and decrease in kidney function and cardiac output. The greatest lost in this domain since physical factors are the primary source of sensory and motor functioning. The changes in physical attributes are generally characterized by menopause in women and andropause in men. Menopause is when the body stops ovulating and producing estrogen and gradual decline in testosterone levels. These physical changes are emphasized of the double-standard of aging. Men become more distinguished and women become old. Cognitive changes has to do with the way humans perceive and experience the world and deals with issues like memory, thinking and decision-making processes and concept comprehension. During middle adulthood, humans are experts at problem solving, although they begin to experience some signs of decline with speed in processing and recall. The lost mainly focuses the ability to perform tasks unlike the agility that they could exert when they are much younger. Many are losing confidence on performing the same task because their IQ or memory won’t allow them to do so. Social changes are wherein the individuals became more aware of his being, his worth and his surrounding. They become more aware of their own mortality, the passing time and the seriousness of the physical decline. The gain is the opportunity to identify you with others and contribute time to the community. Social changes has to do with how an individual is able to handle emotions, relationships, social situations, and the various roles demanded of them by society. Some aspect of Socio/Emotional standards, such as social expectations, relationships, and roles vary from culture to culture. The implication of middle adulthood to social work practice basically refers to the familiarity of the social worker to the journey of the service-users towards reaching that stage of life. The social worker may find difficulty in dealing with them especially when he or she has no idea where his or her clients’ concerns and issues are coming from. Their assistance would be feasible if they can recognize the role that culture plays on the process of. Middle adulthood is met with the psychological and emotional challenges of facing the mid-life crisis, and a life analysis and inventory is taken. During this stage of lifespan, adults encounter changing roles that families face. Firstly in terms of career and work. Adults most often choose to go to college for work-related purposes. Many employers require workers to attain certain levels of education in order to qualify for promotions due to globalization. some adults may change career fearing the consequence of losing jobs while Others go to college to learn new skills in preparation for another career. Some, adults may also return to college simply for personal enrichment. â€Å"The role of work , whether one works in a full time career, part time job or as a homemaker, is central during middle adulthood†(Santrock,2009,p490). As adults reach their peak position in earning, they are saddled with multiple financial burdens including rent, mortgage, medical bills, and children tuition. These competing demands hinder the middle adulthood to further to career progress. They decide whether to change jobs or career, or rebalance family and work or plan for retirement. Having some knowledge about human lifespan development is beneficial for many reasons. It increases self-awareness and understanding, which helps with life planning. If a female is aware of the stages of her physical development, for example, she will know that her natural childbearing years are limited. If she wants to have children, she can use family planning to make choices about her education, career and mate to support this goal. Additionally, this knowledge can be helpful for improving relationships and interpersonal communication and resolving conflicts.

Essay about Distressed Hamlet - 1613 Words

In the novel, Hamlet, there is a character that suffers from a life of insecurity and uncontrolled events that afflict him as there is nothing he can do to change it. Hamlet is . . . a noble prince who suffers from a corrupt world that is not suitable to his sensitive moral nature.† He attempts to improve his distressed reality while his past continued to haunt him. He has a best friend, Horatio, who is loyal to him and tries to help him throughout the entire play. He is engaged to a lovely woman named Ophelia, which he loses interest with after he deals with his dreadful and upsetting world. He eventually leads her to contemplate suicide after rejecting her and making her give up on life. Her brother, Laertes, dedicates his life to†¦show more content†¦The prince now develops even more rejection towards his stepfather and has to keep quiet about this finding or else he would be taken as a fool. He also uses the appearance of being mad to his advantage in his attempt t o rid himself of his uncle and fear him. The prince now exhibits an even more maniacal disposition with the time he had to fester what he is to do next. He responds to Ophelia and shows up with a deranged personality with ragged clothes and a pale appearance. Her father, Polonius, now thinks Hamlet really did love Ophelia and has gone mad after she had rejected him. Then, he sends Rosencrantz and Guildenstern from his school to investigate why he has been acting crazy and to tell him a group of actors has arrived at the castle. He already decides that he will have the actors perform a play reenacting the murder of his father to see Claudiuss reaction because he thinks the ghost is a lying devil. Claudius, Polonius, and Gertrude, wants to test Hamlets love for Ophelia as they spy on a meeting between the two. Then, Hamlet shows his nasty side and proclaims that Ophelia should go see a nunnery and become a nun. Hamlet has forgotten all the pleasures he had in his life to spend his time exacting his revenge on Claudius. The uncle Claudius is troubled with the thought thatShow MoreRelatedEssay on Shakespeares Soliloquies - Hamlet’s Soliloquy1034 Words   |  5 PagesWithin a month...most wicked speed, suggests his disgust at the situation and that it is not necessarily the nature of their incestuous relationship that troubles Hamlet; more the short time in which it occurred. In fact, this is especially well communicated to the audience as, throughout the soliloquy, the passage of time that Hamlet describes gets less from two months to Within a month. This has the effect of outlining Hamlets supposed contempt of his mother for only mourning a month whilstRead MoreHamlet And Laertes By William Shakespeare1265 Words   |  6 Pagesâ€Å"Hamlet and Laertes† William Shakespeare s Hamlet is one of his excellent tragedies which explores the difference between themes such as love and revenge or the complexities of life and death. In Shakespeare s play, Hamlet and Laertes show some comparisons and contrasts which give an abundance of interest to the play. In fact, Hamlet and Laertes display impulsive reactions when angered; both have fathers killed, and both are seeking revenge. Even so, both characters display a considerable likenessRead More Comparing Laertes and Hamlet in Shakespeares Hamlet Essay886 Words   |  4 PagesComparing Laertes and Hamlet      Ã‚  Ã‚   In Shakespeare’s play, Hamlet, the characters of Laertes and Hamlet both display impulsive reactions when angered. Once Laertes discovers his father has been murdered, he immediately assumes the slayer is Claudius. As a result of Laertes speculation, he instinctively moves to avenge Polonius death. To hell, allegiance! Vows, to the blackest devil! Conscience and grace, to the profoundest pit! I dare damnation: to this point I stand, that both worlds IRead MoreAnalysis Of To Be Or Not To Be795 Words   |  4 PagesTo Be or Not To Be Essay The Hamlet play by William Shakespeare, the â€Å"To Be or Not To Be† speech is a very famous soliloquy in English Literature. This piece refers to the theme of the afterlife, it also provides Hamlet’s continued reflecting contemplation between his ambiguous personalities. Throughout the speech Hamlet contemplated the thought of offing himself right then and there. This is shown by his depressed sequestered tone and his distressed actions with the dagger that successfully programsRead MoreLove Thy Mother Most Peculiar Essay1235 Words   |  5 PagesAbstract: Does Hamlet, a character in Shakespeare’s historical play, have the Oedipus complex? Do we truly understand the semantics of the Oedipus complex? Many critics have had different opinions. According to Webster’s online dictionary, the Oedipus complex is a â€Å"complex of males; desire to possess the mother sexually and to exclude the father; said to be a source of personality disorders if unresol ved† (Websters Online Dictionary, 2011). Another source defines the Oedipus complex as â€Å"theRead MoreThe Tragedy of Hamlet by William Shakesperare977 Words   |  4 Pagesâ€Å"The Tragedy of Hamlet, Prince of Denmark†, shortened to â€Å"Hamlet†, written by William Shakespeare dramatizes the revenge Prince Hamlet is instructed by his father, King Hamlet, to execute on his uncle Claudius, who murdered the king. Not only did he kill Hamlet’s father but then succeeded to the throne and took the murdered king’s wife, Gertrude, to be his own. Shakespeare uses Hamlet’s major soliloquies to depict a close to clear picture of Hamlet’s true character. He gives us many soliloquies,Read MorePerfect Idealism In Shakespeares Hamlet1631 Words   |  7 PagesIntroduction The play Hamlet is a fable of how the ghost of a slain king comes to haunt the living with disastrous consequences. A rancorous ghost and a brother s murder, lead the gloomy setting of Hamlet s Denmark. Hamlet story opens with an encounter between young Hamlet, his dad s ghost as well as the prince of Denmark. The ghost reveals to Hamlet that its murderer was his brother Claudius, who then rapidly wedded his widowed queen, Gertrude. As a result, the ghost presses Hamlet to seek vengeanceRead More Shakespeares Hamlet - Regarding Gertrude Essay1965 Words   |  8 PagesRegarding Hamlet’s Gertrude  Ã‚        Ã‚  Ã‚   In William Shakespeare’s most famous tragedy Hamlet, the audience meets a queen who is a former and present queen. She was unhappy before – how does she feel now? Is she evil, guilty, motherly, lascivious? The multiple aspects of her personality deserve our attention.    Angela Pitt in â€Å"Women in Shakespeare’s Tragedies† comments that Shakespeare’s Gertrude in Hamlet is, first and foremost, a mother:    Gertrude evinces no such need to justifyRead MoreWilliam Shakespeares Presentation of Hamlet Through Soliloquies2419 Words   |  10 PagesWilliam Shakespeares Presentation of Hamlet Through Soliloquies Shakespeare presents Hamlet in the first Act as distraught and angry in a state of utter depression caused by his father’s death and as we learn during the first soliloquy, by his mother’s ‘frailty’ in remarrying so soon after the King’s death. Shakespeare reveals Hamlet’s torment and the origins and causes of a lot of his feelings that contribute to his behaviour throughout the play, in the first of Hamlet’sRead MoreHamlets 7 Soliloquies1815 Words   |  8 PagesShakespeare s, Hamlet, features a round, enigmatic character, Hamlet, whose personality is brought out and understood with the help of seven soliloquies featured throughout the play. He leads a very complicated life as his father, the former King of Denmark, was killed by his uncle, the present King, who is now married to his mother, Gertrude. Audiences often find it difficult to extract pieces of his personality because of how mysterious and difficult to read he is. However, Hamlet s seven soliloquies