James Cook :: essays research papers

James Cook   Ã‚  Ã‚  Ã‚  Ã‚  Do you know who the worlds greatest explorers are? One of them is the topic of this essay. This essay is about James Cook. The objective of this report will be to answer the following question: Why do we remember James Cook?   Ã‚  Ã‚  Ã‚  Ã‚  James Cook was born on October 27, 1728 in Marton, England. At the age of 18 James Cook became an apprentice with a shipping company. His first voyages he worked on ships that carried coal to English ports. In 1755, during the French - Indian war, Cook joined the British navy. In 1759 he was given a dangerous wartime mission. He was to enter French territory and survey the St. Lawrence river for the British navy. The charts that he made during this voyage contributed to the capture of the French city of Quebec later in that year.   Ã‚  Ã‚  Ã‚  Ã‚  James Cook made three voyages to the Pacific. His first voyage, in 1768, the navy appointed Cook to lead an expedition to Tahiti. On the Endeavour they left in August and reached Tahiti in April of 1769. On the island scientists watched the planet Venus pass between the Earth and the Sun. This was the main goal of this voyage but cook had been given secret orders to find an unknown continent in the south pacific. He was told to find it because geographers believed that it kept the world in balance, however Cook was unable to find it. In October of 1769 Cook became the first European man to visit New Zealand. In April of 1770 the Endeavor sailed to Botany Bay on the east coast of Australia. Cook claimed the entire east coast of Australia for Great Britain. He returned to England in July of 1771. During this voyage, from 1678 - 1771, Cook became the first ship captain to prevent an outbreak of scurvy. Cook had heard that scurvy was caused by a lack of fresh vegetables and fruits. To prevent an outbreak he served his sailor's fruit and sauerkraut. In July of 1772 Cook set off on his second voyage to the pacific. Cook had left England with the Resolution and the Adventure. This expedition was Cook’s second attempt to find the unknown southern continent. During this voyage Cook sailed farther south than any European had ever gone. Cook faced many dangers in the cold Antarctic waters. Jagged mountains and ice as high as 18 meters often blocked the way of the ships. High winds that pushed the icebergs towards the ships increased the danger. Cook circled Antarctica but the ice kept him from sighting land.

Daily Routines

Your Daily Routines: Then and Now Day| Before College| After College| Sunday| My daily routine before college on a Sunday was to attend church service and was to decide what our Sunday dinner plans were. | My daily routine now that I am enrolled in college on a Sunday are to attend church service, decide what our Sunday dinner plans are, and to make sure that all of my assignments and discussion questions are submitted, and all participation posts are completed for the week. .| Monday| My daily routine before college on Mondays were to go to work and come home to watch my favorite TV shows to wind down from my day. My daily routine now that I am enrolled in college on a Monday is to go to work try to complete a participation post or a discussion question during my lunch break, and then come home and make dinner while studying. | Tuesday| My daily routine before college on Tuesdays were to go to work and come home to watch my favorite TV shows to wind down from my day. | My daily rout ine now that I am enrolled in college on a Tuesday is to go to work try to complete a participation post or a discussion question during my lunch break, and then come home and make dinner while studying. Wednesday| My daily routine before college on Wednesdays go to work and come home to watch my favorite TV shows to wind down from my day. | My daily routine now that I am enrolled in college on a Wednesday is to go to work try to complete a participation post or a discussion question during my lunch break, and then come home and make dinner while studying. | Thursday| My daily routine before college on Thursdays were go to work and come home to watch my favorite TV shows to wind down from my day. My daily routine now that I am enrolled in college on a Thursday is to go to work try to complete a participation post or a discussion question during my lunch break, and then come home and make dinner while studying. | Friday| My daily routine before college on Fridays were go to work and come and decide what our weekend plans were with our friends are and maybe have a date night. | My daily routine now that I am enrolled in college on a Friday is to go to work try to complete a participation post or a discussion question during my lunch break, and then come home to spend time with my husband. Saturday| My daily routine before college on a Saturday was to sleep in late, make a nice lunch fore my husband and then go out with friends and enjoy each others company later that night. | My daily routine now that I am enrolled in college on a Saturay is to wake up a bit earlier than usual to try to complete a participation post or a discussion question before cleaning my house and going out with friends. | What are the major differences in your daily routine now that you are in school? The major differnces that I see now that I am back in school are that I have a more structured schedule and am able to focus on completeing assignments before doing extracuricular activities. Have you included enough time into your schedule for academics? What information in the chart demonstrates evidence to support your answer? I have included enought time into my schedule for academics by cutting out alot of television watching and minimizing the activites I do with friends prior to completeing my class work. The information on the chart that demonstrates evidence of this is there not being any extra activites or television watching during the week or prior to completeing assignments. Do you have an effective balance in the use of your time and your priorities? Why or why not? I do feel that I have an effective balance in the use of my time and my priorities by my cutting out the things that will not assist me in acgieving my goal of and education and earning my diploma. I have substituted watching television by watching the web tutorials. What are some time management strategies you have learned this week that you can implement to make your daily routine effective? A time management strategy I have learned this week is to learn to comprimise with myself I have to buckle down and do my works on certain days so that I can reward myself and be afforded the time for fun activities on other days when my classwork has been completed.

The AIDS Epidemic Outbreak

Who would have ever thought that a disease, possibly brought to America by infected African monkeys, would affect the country forever? This is exactly what happened in the late nineteenth century when the Acquired Immune Deficiency Syndrome (AIDS) was introduced to America. The unpredictable epidemic caused a huge outrage for years to come. The outbreak of the HIV virus, AIDS, in the early 1980†³s resulted in medical research, public misconceptions, and ultimately growing awareness. Appearing first only in homosexual men, AIDS was an unfamiliar virus to the entire United States. Reports of unknown and unexplainable symptoms caused much confusion among patients and even doctors. In 1981, the first reports explained that 41 homosexual men in the San Fransisco area had â€Å"†¦ a rare and often rapidly fatal form of cancer† (Altman n. p. ). After years of researching these cases and millions of others appearing later in the decade, scientists discovered that it was not cancer they were dealing with. They called it HIV (Human Immune Virus) which leads to AIDS (Acquired Immune deficiency Syndrome) that â€Å"†¦ rogressively destroys the body†s ability to fight infections and certain cancers† (ARIC n. p. ). With minimal research there was nothing to initially â€Å"combat† the virus; but, thanks to time and funding, there were some drugs that seemed to help stop the spread of the virus in ones body. These anti-retroviral drugs still don't constitute as cures ! for the virus, but have definitely helped and continue to help patients live longer (ARIC n. p. ). Since a vaccine to â€Å"†¦ evoke an immune system response that will prevent infection or disease development† still has not been found, other treatments have been tested. Accupuncture, stress management, hypnosis, exercise, good nutrition, and an overall positive attitude all seem to alleviate symptoms even if they are not proven cures of the virus (Packer 78-88). Although AIDS is a life threatening disease, there were many people living with it by keeping healthy and staying safe. Scott Fried had not tried any of the aniviral drugs; however, practices such as taking 80 herbs and vitamins a day, staying physically fit, visiting the doctor every three months, and being happy have kept him alive with the virus for thirteen years (Fried speach). Most victims have not lived as long as he which is why AIDS has lead to some extensive research. Investigators supported by private and public funds continued to search for a cure or even an explanation of HIV/AIDS for two decades because like the â€Å"b! lack plague†, AIDS has killed off millions of people in a short time. Also like the black plague did, AIDS carried with it a long string of misconceptions. In the Middle Ages anyone carrying the â€Å"black plague† was to be avoided. Similarly, the public would often avoid people with AIDS. There were fabrications that AIDS could be caught by another human being from sneezing, coughing, hugging, kissing or even any â€Å"casual contact† ; so, people stayed away from those who were infected by AIDS. Another lie was that AIDS was caused by something magical or mystical (Taylor 23-24). Though some were overly careful of â€Å"catching† the virus, others were not careful enough. Since the initial outbreak was among gay men it was simply assumed that only gay men could be affected. Then reports of IV drug users having the disease still seemed to eliminate the chance of the common person being infected. Next, hemophiliacs and people who had had blood transfusions were reported followed by blacks, Hispanics, lesbians, straight women and finally white, heterosexual, males. Still everyone said â€Å"It can†t happen to me,† until it did (Fried speech). This assumption that AIDS only affected few amounts of people and only minorities was the basis of all misconceptions about that virus. People did not believe the virus could have any impact on their lives; but, it did impact everyones lives directly and or indirectly. Now that â€Å"AIDS is the second leading cause of death in the United States among people aged 25 to 44†³ (ARIC n. p. ), the misconceptions have been proven to be false. Although it was statistically correct that 66% of people infected by AIDS were homosexual males, 24% were IV drug users, and only 4% were heterosexual males or females (Packer 17) it was still a fact that AIDS can affect anyone. After years of research and statistical reports there were finally people relaying these messages to the public. Motivational speakers, like Scott Fried, continue to reach out to teens and adults about AIDS and sex. Information about these subjects can also be found easily, not only at hospitals or doctors† offices; but in books, magazines, pamphlets, and even on the internet. Conducting a simple search on http://www. yahoo. com came up with 164 â€Å"category matches,† 1,206 â€Å"web site matches,† and 237,000 web page matches. This means that HIV/AIDS appears at least 238,370 times on th! e world wide web and it shows that AIDS in an important component of modern life. Not only are people becoming aware of the AIDS epidemic, but they are becoming aware of sexuality through learning about AIDS. Before the outbreak of this fatal virus sex was only spoken about discretely. Now even kids are being made aware of the dangers of sex and spreading HIV. In this way HIV/AIDS had a positive affect on the country. People are aware of the facts and probably make better decisions. Some experts have said that AIDS will remain the way it is now and others predict it growing into a â€Å"huge epidemic† (Taylor 28). Hopefully due to this expansion of knowledge and recognition, he AIDS virus will not spread as quickly and infect as many people as it has in the past. HIV positive, homosexual, male, Scott Fried, said, â€Å"Ironically one of the blessings that HIV/AIDS has brought me is the abundance of love. . . † and perhaps that is true. Pertaining to the eighties and the early onset of the virus, AIDS caused much more commotion than love. However, every cloud has a silver lining and the hysteria has finally cleared up some myths. It has opened up the public to not only HIV/AIDS awareness, but sexual cognizance as well.

Ocean Dumping: Key Issues

Ocean Dumping: Key Issues Liz Gomez Ocean Dumping: Key Issues Marine debris is the official designation and referents to human created wastes that pollutes and are dumped deliberately or accidentally in lakes, waterways, seas and oceans. While certain debris naturally float on bodies of water (i. e. ogs and trees that got cut via natural events), certain communities, peoples and industries the world over deliberately dump debris and garbage in bodies of water without much thought into the effects of such acts in relation to threats to animals (fish, sea mammals, birds, reptiles) their habitats, coastal habitations and to human industries that depend on the bounty of the sea (i. e. fishing). Of late the greatest threat are the toxins released via the practice of ocean dumping which can destroy so easily fragile ocean habitats.Plastic and Styrofoam’s, being non-biodegradable cannot breakdown and affect ocean and water inhabitants in so many ways – accumulated debris preve nts photolysis, a component in photosynthesis killing marine life. Ghost nets and accumulated plastic as well as unique debris like six-pack rings can entangle marine life and result to movement restriction which can lead to starvation, laceration, infection and eventually, death. Dugongs, dolphins, sharks, reptiles, sea turtles and all sorts of fish can easily get entangled with ghost nets.Plastic bags and plastic pellets – the broken down versions of plastics via weathering clog the digestive tract of marine animals and where they pool, prevent photolysis as well. It does not help that the smaller pellets, known as nurdles resemble fish eggs. Populations of fish and sea mammals often mistake them for fish eggs and their ingestion result to death. Ever since man started sailing, the ocean has become a dumping ground for debris and materials. Greenpeace estimates that annually, containers ships lose about 10,000 containers while at sea.Adding to marine debris is the runoff fr om landfills & storm drains. The danger in the toxic contamination via ocean dumping can be seen in varied incidents in the Arctic Sea. In the 50's Russia dumped highly radioactive materials in their own part of the Arctic – the Barents Karas Sea but the toxicity spread through the rich fishing grounds of the international and open waters of the sea that it affected and threatened fish populations and the industry of Arctic Sea Fishing.Of recent, the experience of the oil spill in the Gulf of Mexico showed how fragile marine biology is as species of marine life got heavily affected which in turn affected the fishing and tourism industries of the towns and cities around the gulf which destroyed livelihoods and way of life. Aside from the issues listed above, key concerns in relation to how ocean dumping affects human life are identified as follows (Burger, 2009) – 1) Occupational accidents, injuries, and exposures; ) Exposure of the public to hazardous or toxic material s washed up on beaches; 3) Human consumption of marine organisms that have been contaminated by ocean disposal. A further complication is the practice of legal dumping where countries (including the US) allow dumping of materials into the sea/ocean following certain situations and measures. Environmental organizations have since been advocating against such measures. To counteract them however, in the case of the US, the following measures have been put in place – †¢ Resource Conservation and Recovery Act, Toxic Substances Control Act, †¢ Water Pollution Prevention and Control Act, †¢ Air Pollution Prevention and Control Act, Dangerous Cargo Act, †¢ Ports and Waterways Safety Act, †¢ Deep Water Ports Act, †¢ Ocean Dumping Act Of the above, the biggest act with a direct impact on ocean dumping is the last measure, the Ocean Dumping Act. Enacted in 1988, with additional amendments the EPA presents the highlights of the act today as follows (EPA, 20 10) – †¢ TITLE I – OCEAN DUMPING BAN ACT OF 1988 (Amends the Marine Protection, Research, and Sanctuaries Act, commonly called the â€Å"Ocean Dumping Act†) Makes it unlawful for any person to dump, or transport for the purpose of dumping, sewage sludge or industrial waste into ocean waters after December 31, 1991; †¢ Prohibits, after the 270th day after enactment, any person from dumping, or transporting for the purpose of dumping, sewage sludge or industrial waste into ocean waters unless the person: (1) enters into a compliance or enforcement agreement (which includes a plan negotiated by the dumper, the State, and EPA for terminating dumping as well as a schedule which EPA believes will result in the termination of the dumping), and (2) obtains a permit issued by EPA under authority of sec. 02 of the Marine Protection, Research, and Sanctuaries Act (MPRSA); †¢ Provides for the payment of special fees for dumping and any penalties incurred by a dumper to be deposited into certain funds for use in finding alternatives to ocean dumping. †¢ TITLE II – DESIGNATION OF AREAS FOR PRIORITY CONSIDERATION UNDER NATIONAL ESTUARY PROGRAM †¢ This title adds four new areas to the list of sites which EPA must give priority consideration when designating new estuaries for inclusion in the National Estuary Program: Massachusetts Bay; Barataria-Terrebonne Estuary Complex, Louisiana; Indian River Lagoon, Florida; and Peconic Bay, New York. TITLE III – DUMPING OF MEDICAL WASTE †¢ Cited as the â€Å"United States Public Vessel Medical Waste Anti-Dumping Act of 1988†, this section prohibits, 6 months after enactment, disposal of potentially infectious medical waste into ocean waters by a â€Å"public vessel†. Two narrowly crafted exceptions to this prohibition relating to health and safety of the crew, or times of war or national emergency are set forth. This title also: defines â€Å"medical wasteâ €  for purposes of the Ocean Dumping Act; adds medical wastes to the list of materials the dumping of which is prohibited under the Ocean Dumping Act; increases the civil penalties for illegal dumping of medical wastes under the Ocean Dumping Act and includes a provision for forfeiture of the vessel; and provides increased criminal sanctions under the Ocean Dumping Act for illegal dumping of medical wastes; defines â€Å"medical waste† for purposes of the CWA using the same definition as for the MPRSA; and, incorporates the term â€Å"medical waste† into the list of pollutants for which the discharge is prohibited under sec. 301(f) of the CWA. †¢ TITLE IV – SHORE PROTECTION ACT OF 1988 †¢ This section prohibits the transportation of municipal or commercial waste within coastal waters by a vessel without a permit and number or other marking. The Secretary of Transportation will issue the permits. The application procedure is set forth. Grounds on whi ch a permit may be denied are set forth. The federal Department of Transportation has discretion to deny permits, but must deny a permit if so requested by EPA. Other specifics as to this process are detailed. OpinionThe advocacies of Greenpeace and agencies campaigning against ocean dumping are clear in their message. Ocean Dumping is not conducive to maintaining ecological balance and while for now it might be immediately beneficial to those legally allowed to dump waste in our oceans, in the end when the toxicity level reaches concentrations that are deadly, there will come a point where it some areas of our oceans and bodies of water will become ‘dead' – marine life would not be supported and the toxicity from such concentrated pollution will easily affect other parts of struggling marine environments. Fishing and related industries will be affected and human life dependent on marine bounty will be deeply affected.To me, it seems that because of the vastness of the planet's oceans and the lack of a universal enforcement body and law that can require countries and their citizens to ensure that all these rules are followed, it would seem that some of these advocacies and campaign fall into deaf earns. There are shorelines and coastlines the world over that are now full of debris, coral reefs have died, former healthy fishing habitats have now dried up. What I find most problematic is the ‘legal dumpings' – if environmental protection of oceans is a priority surely dumpings that no doubt will increase ocean debris and contribute to water toxicity should not be tolerated.So far however in international waters, without the activity of advocates like Greenpeace, the negative effect of ocean dumping will most certainly not find its way into public concerns. A country can only police its own people and its shorelines. I believe that globalization has increased man's activities in relation to manufacture travel and trade and pollution brou ght about by ocean dumping will no doubt have long term affects to the health and state of marine life all over the world. A universal measure to counteract this problem and the creation of an international agency empowered by the UN for example should be put in place to ensure that the problem does not escalate. I doubt this will happen anytime soon, however.The 1982 UN Convention on The Law of the Sea (UNCLOS 1982) which was enforced in 1994 is the closest but is limited for it only provides a ‘framework for the determination of the rights and obligations of states relating to the oceans' only. While ‘Part XII contains provisions with regard to protection and preservation of the marine environment' – they are still just non-working provisos that are having problems in terms of enforcement. Without an agency tasked to reinforce the provisos, the Law of the Sea remains ineffective. References: http://www. enotes. com/public-health-encyclopedia/ocean-dumping http:/ /archive. greenpeace. org/odumping/ http://www1. american. edu/ted/arctic. htm http://www. epa. gov/history/topics/mprsa/02. htm http://www. pollutionissues. com/Na-Ph/Ocean-Dumping. html

Crystal Violet Formal Lab

Determination of Reaction Rate Law from the Reaction of Crystal Violet with Sodium Hydroxide ______________________________________________ Abstract: This experiment helps determine the rate of reaction of crystal violet while it reacts with sodium hydroxide with respect to crystal violet. The amount of sodium hydroxide is varied in this experiment while crystal violet is kept at a constant. The transmittance of crystal violet is observed and recorded using a colorimeter and the data obtained is used to plot graphs which are manipulated using LoggerPro software to produce the desired outcome; rate of reaction of crystal violet.Upon completion of the experiment it was seen that the rate of reaction of crystal violet turned out to be 1 which meant the reaction was first order with respect to crystal violet. This was deduced upon plotting the graph of ln Absorbance versus time of crystal violet and by drawing the line of best fit, which showed that the slope graph was 1 which is the rat e of reaction. This whole experiment was based upon the equation: Rate= k [CV+] [OH-], where k stands for the rate constant.Introduction: Kinetics, which is the study of how fast a reaction takes place or in other words the rate of a reaction, is the main ideology in this experiment. Reaction rates can be measured in a number of ways: by monitoring the amount of product formed, by measuring the loss in mass of reactants, for reactions involving gaseous products measuring the volume of gas produced, by electrolytic conductivity, pH measurement or for colored reactants or products measuring the transmittance by the use of a colorimeter.In this experiment the last method of measurement is used which is colorimetry. Colorimetry is a method of determining the kinetics of a reaction using a spectrometer which observes the amount of light that is absorbed or transmitted through a colored solution. As a reaction proceeds, the reactants either fades away or the product forms the color. By mo nitoring these changes the amount of product formed or reactant used up with respect to time can be monitored. The amount of light that is absorbed by a colored substance can be measured by calculating percentage absorbance or transmittance.A very helpful device known as colorimeter which is present in almost all equipped labs makes this quite simple to deduce. The machine displays the amount of light that passes through or absorbed by the substance. This instrument is based on the optics law or more commonly known as Beer-Lambert law, which is used in measuring the concentration of a solute in contrast to its absorbance. The colorimeter measures the wavelengths of different solutions as they vary. Distilled water is used as a reference in this experiment as it contains no colored elements and has a value of zero when inserted into the colorimeter.Crystal violet, a purple dye commonly used in inks or printers is reacted with sodium hydroxide, commonly known as caustic soda which is a powerful base. Sodium hydroxide is a colorless solution which when reacted with crystal violet causes it to lose its purple color and form a colorless product. The purpose of this experiment is to determine the order of the reaction with respect to crystal violet by using colorimetry. The amount of crystal violet is kept at a constant during the whole experiment while various amounts of sodium hydroxide, each of varying concentration are used.This method of determining rates is called the isolation method. Amount of reactant used with respect to time or the rate of reaction can be determined by plotting a graph of concentration versus time for the reactant if the reaction is first order. The slope is a measure of how much reactant is used per unit of time. As the concentration of reactant reduces in a chemical reaction, the slope is a negative value, hence by considering the absolute value of the slope, the rate of reaction of that reactant can be found for the reaction.If the rea ction was to be of second order, a graph of ln of concentration versus time would produce the rate of reaction by determining the slope like before. It must be noted that only the absolute value of the slope matters in this situation. Third order reactions have somewhat a similar story except they require a plot of 1/concentration versus time to determine rate of reaction. When all three graphs are plotted, the graph with the line of best fit, or the one in which all point seem to be on a straight line is the correct one for the reaction. This is easily drawn using the LoggerPro software.When all three graphs are drawn, the graph with the best fit line and lowest root mean square error, or the lowest deviation from the best fit line, is the graph to be used to determine reaction kinematics. This knowledge is acquired from the equations of the integrated rate laws which are explained in the textbook. The solutions are mixed in small amounts in cuvettes and inserted into the colorimet er, which reads the percentage transmittance during the time period. The colorimeter has an enclosed space for the cuvette to be inserted making sure light from other sources does not interfere with the reaction, hence providing accurate results.The rate of the reaction is determined by using the equation: Rate= k [CV+] [OH-], where k is the rate constant for the reaction. Materials: Solutions of crystal violet and sodium hydroxide were available in the laboratory which were previously prepared of concentrations 2. 00 E-5 and 2. 00 E-2 respectively. Deionized water was used in calibration while cuvettes were used to transfer substances into the colorimeter. Magnetic stirrers along with stir bars were used in mixing the reagents together which were transferred to the beaker via pipettes to ensure accurate results were produced.Methods: Three solutions were made to be put into the cuvttes. The first of them contained 20ml of crystal violet and 20ml of sodium hydroxide. The second had 20ml crystal violet along with 10ml of distilled water and 10ml of sodium hydroxide. The third solution contained 20ml crystal violet with 15ml distilled water and 5ml sodium hydroxide. The reagents were mixed well in beakers, each containing the different solutions and were stirred sufficiently on a magnetic stir plate. The colorimeter was calibrated with distilled water which set a reference value of zero making sure that all succeeding readings would be accurate.A small sample of the first solution was placed in a cuvette which was inserted into the colorimeter. Data collection started immediately and was recorded for 15 min, the whole duration of the cuvette in the colorimeter. The different values of transmittance were recorded and the data was plotted into a graph with the help of LoggerPro software. The same procedure was repeated for the second and third solution and thereby obtaining three different Absorbance versus time graphs for each. Care was taken at every step of thi s experiment to ensure that errors were minimized to the fullest.The colorimeter was calibrated every time before placing a new cuvette into it to make sure results were accurate. The dye was handled with care as it leaves stain marks on any surface it is spilled on. Goggles were worn throughout the experiment to keep the eyes from risk of exposure. Safety gloves were worn to handle all reagents as one of them, sodium hydroxide, is a strong base and has significant corrosive properties. The graphs obtained from the three solutions were then manipulated using the LoggerPro software which enables he application of various calculus functions to produce different graphs, all of which lead to determination of the order of the reaction. A line of best fit was applied to all three graphs and the slopes (m), absorbance value at 7min (a) and the root mean square error (RMSE) were recorded. The first graph was reopened and a new column of ln Absorbance was made, using this data, another plot of ln Absorbance versus time was created using LoggerPro. This was done again for the second and third solutions.The graph of Absorbance versus time for the first solution was opened again to produce a graph of 1/Absorbance versus time which was saved. All of these were made possible using LoggerPro. All of the graphs produced had a line of best fit through them which made it easy to determine slope and RMSE values for each of them along with absorbance values at 7 minutes, which is the half life of the reaction period or half the time for the data to be collected. All of the data collected from the graphs were tabulated and values were used in determining the reaction rate of the reaction.Results: Figure 1: Graph slowing relationship of Absorbance versus time for first solution Figure 2: Relationship of ln Absorbance versus time for first solution Figure 3: Plot of 1/Absorbance versus time for first solution Figure 4: ln Absorbance versus time plot for solution 2 Solution| Order(p) | ? RMSE? | 1| 0| 0. 01641| 1| 1| 0. 01129| 1| 2| 0. 3810| Table 1: RMSE values for the three graphs for solution 1 Solution| Order (p)| [OH-]0/M| Kps= -Slope(m)*| 1| 1| 10. E-3| 0. 09287| 2| 1| 5. 0E-3| 0. 1238| 3| 1| 2. 5E-3| 0. 01038| *(m= slope from plot of ln Absorbance versus time)Table 2: Slopes of the different ln Absorbance versus time for three graphs Figure 5: Plot of kps (slope) versus [OH-]0 Figure 6: Graph of ln kps versus ln [OH-]0 Solution| Order(p)| Slope (m)| Value at 7 min (a)| RMSE| ? RMSE/a? | 1| 0| -0. 02360| 0. 271| 0. 01641| 0. 0605| 1| 1| -0. 09287| 0. 271| 0. 01129| 0. 0416| 1| 2| 0. 40210| 0. 271| 0. 3810| 1. 405| 1| 1| -0. 09287| 0. 271| 0. 01129| 0. 0416| 2| 1| -0. 12380| 0. 134| 0. 01566| 0. 1169| 3| 1| -0. 010380| 0. 492| 0. 00693| 0. 0141| Table 3: Data obtained from all the graphs plottedIt was observed during the reaction that the color changed from purple to colorless at the end when taken out of the cuvette. Discussion: Table 1 shows the absolute (RMSE /a) values for the first solution. The RMSE values are obtained from the graphs produced from solution 1(graphs 1, 2 and 3). The graph with the least absolute RMSE/a value is the one with the best fit line with the greatest accuracy; hence the graph 2 or the plot of ln Absorbance versus time for solution 1 is the most accurate one as it has an absolute RMSE/a value of 0. 129. Thus it can be deduced from the table that the reaction is first order with respect to crystal violet. Since it is now known that the reaction is first order with respect to crystal violet, the functional relationship for p=1 is: ln Absorbance= [ln Absorbance]0- kpst; This equation is familiar since it is one of the integrated rate law equations as seen previously. First order reactions are determined if the plot of ln Absorbance versus time have a line of best fit which is accurate.Thus the equation above shows that the best fit line from the plot would equal to –kps. Therefore the kps values woul d be equal to negative of the slopes of ln Absorbance versus time graphs for all three solutions which is depicted in Table 2. To determine the order of reaction with respect to [OH-] some more calculations are required and more graphs are required to be plotted. The kps values obtained from Table 2 along with the [OH-]0 values aid in the plotting of another kps versus [OH-]0 graph. The graph that is obtained is shown in Figure 5.To double check the accuracy of the graph, a second graph of ln kps versus ln [OH-]0 is plotted which would be the graph if the reaction was to be of order 1 with respect to [OH-] which is depicted in Figure 6. When the two graphs are compared to each other and their slopes and RMSE values compared from the data collected in Table 3, it is seen that the reaction is actually in fact order 1. 5 which when rounded off to the nearest integer would be equal to 1. q= slope of plot of ln kps versus ln [OH-]0= 1. 581 as seen from Figure 6.The RMSE value is also a v ery low value which means that this value would be very accurate and hence the reaction would be first order with respect to sodium hydroxide. The discrepancy in the final value of q can be accounted for by transfer losses, when the reagents were being transferred from the pipette to the beaker; some of it remains in the pipette and causes the concentration to be a little lower than actually reported. It should also be noted that the same cuvette was not used throughout the experiment.Different cuvettes are made from different plastics from varying compositions which mean they have different permeability which doesn’t allow the same wavelengths of light to pass through all of them, thus the colorimeter reads differently which causes errors. The reaction starts off with a purple color as crystal violet is a purple solution and sodium hydroxide is colorless. As time elapses, the violet color starts to fade away and the solution becomes colorless as their product is a colorless aqueous solution.Conclusion: Thus the above experiment concludes that the reaction was first order with respect to crystal violet and also first order with respect to sodium hydroxide. The overall reaction order was 2 with respect to crystal violet and sodium hydroxide. The overall of the rate law for the reaction would be: Rate: k [CV+] [OH-]. To ensure results are more accurate in the future, a single cuvette should be used when carrying out the whole experiment and all of the reagents must be transferred efficiently without loses to and from the beaker to ensure 100% efficiency along with using proper safety equipment while handling chemicals.References: 1. Atkins, P. W. (1978). Physical chemistry. San Francisco: W. H. Freeman. 2. Allen, J. P. (2008). Biophysical chemistry. Malden, MA: Blackwell Pub. 3. Lindon, J. C. , Tranter, G. E. , & Holmes, J. L. (2000). Encyclopedia of spectroscopy and spectrometry. San Diego: Academic Press. Appendix: Solution 1: Order 0, ? RMSE/a? = 0. 01 641/0. 271= 0. 0605 Order 1, ? RMSE/a? = 0. 01129/0. 271= 0. 0416 Order 2, ? RMSE/a? =0. 3810/0. 217= 1. 4050 Solution 2, Order 1, ? RMSE/a? =0. 01566/0. 134= 0. 1169 Solution 3, Order 1, ? RMSE/a? = 0. 00693/0. 492= 0. 0141

Trucanini Art Essay Example | Topics and Well Written Essays - 500 words

Trucanini Art - Essay Example The Trucanini image is one woman who is trying to come to terms with the frequent changes in the world which to her she cannot manage to change them. On the face the woman appears to have given up but the youthful beauty is still evident. The image depicts her as seated looking at the viewer with a traditional shell necklace and on her shoulders is the kangaroo skin. The photographic images were limited in the sense that by the time, the era of photography arrived in Tasmania in 1858 most of the population was dead a reason that explains why it was difficult to retrieve records. To add to this, during the colonial period there were a few artists and therefore the paintings were rare to find since they were not free to settle near the culture of civilized individuals. There were only two portfolios of Tasmian Aborigines that were known to these artists. The water color paintings would indicate women who had their hair shaved and only a circle of hair was left round the head while for the men they were bearded, unshaven hair and had no necklace. Given the poor rate of photography the power of the image of Trucanini was not portrayed well. For instance in the first portfolio, it was an amateur painting and sketch which were photographed in a squalid condition where the Trucanini are depicted as being comfortable with no hesitation. They have resigned to submit to the idea of imprisonment that was presented to them by the European colonies. No effort has been made by the photographers.

Marketing report 1 Essay Example | Topics and Well Written Essays - 750 words

Marketing report 1 - Essay Example Reports from social media comment that 75% of internet users actively participate in social platforms, which shows that online review of products will continue, and companies will not have control of the same. Similarly, consumer preferences are dynamic; hence, consumers are gradually becoming the brand managers. From such a standpoint, the consumers will continue sharing their opinions because they want companies to make or produce products in a particular manner. Such has a variety of implications, one; consumers are going to rely on online reviews to consider buying or consuming particular products. In addition, marketing will take a different dimension, in that; the ads on different products will gradually lose meaning. This means that, the message on a certain product will not serve as a motivator to consuming behavior. In other words, brands will not control the message because consumers are gradually becoming brand managers for the products they consume. Companies that fear online brand review should change their tact. Doing so is strategic, and consumers will find a sense of belonging, in that; they can give, their opinions and companies use them to create preferred products. Similarly, the feedbacks are not only beneficial to consumers, but also offer insight to marketers; hence, they can incorporate user-generated reviews into their marketing strategies (Adamczyk). Concerning the function of social media in marketing, the Gap Model of Service Quality applies. From the article, it is evident that renowned brands are shunning consumers from giving their feedbacks, particularly negative reviews for their products. However, considering that the consumers are becoming brand managers; therefore, there is a clear gap. The online reviews are suggestions on what the consumers expect, and what companies perceive they want. As for such, the companies fail to appreciate the consumer’s