Investigatory Project Physics Essay Example for Free

Investigatory Project Physics Essay The objective: The objective was to see which colored jars had the highest emissivity (or absorbed heat the fastest) which colors radiate heat the fastest by performing independent tests for heating cooling the colored jars. Methods/Materials Nine of the 10 small jars were painted on the outside with different colors of enamel paint. The 10th jar was used as the control variable. For the heating testing, the colored jars were divided into 3 groups. Group 1: red, blue, yellow; Group 2: gold, silver, black; Group 3: white, green, purple. Each jar started with 80 mL of 24 degree C tap water. The worklight had 2 high-powered lights of 500 watts each and 4 jars were tested at a time (each group was tested 1 at a time; one jar always being the control) for a total of 3 tests for 1 heating trial. There were 2 jars per light, both 20 cm from the light and 3 cm from each other. The 4 jars each had calibrated glass thermometers in them to monitor the water temps. A foil wall was put between the 2 lights to keep light heat from affecting the other lights jars. The temps were checked every 10 min. for a 100-min. period and recorded. For the cooling trial, 59 degree C water was poured into the 10 jars. The temps were checked and recorded the same way as the heating trial. Results The green jar heated the fastest with its temp rising to 63 degrees C at the end of the period. Blue followed with 59 degrees C. Black was near average, with 52 degrees C. Gold stayed coolest with 41 degrees C. All colors cooled at almost the same rate but Black always had the coolest temp compared to the other jars. Conclusions/Discussion The hypothesis was incorrect in the heating trial, but was supported in the cooling trial. During research a picture of the visible spectrum was found, showing blue and green with the thickest bonds. Maybe thats why the blue and green jars heated the fastest appeared to have the highest emissivity. The black jar cooled the quickest maybe because its color had the jar absorb the heat from the water. Green appeared to have the highest emissivity. It may be linked to why chlorophyll is green. If the colored jars were placed under a light source, the darkest color of the set would heat the fastest (or have the highest emissivity); if all colored jars were cooled from the same temperature, the darkest would cool the fastest.

The ethical issues regarding recreational hunting

The ethical issues regarding recreational hunting For well over a century, recreational hunting has been an activity pursued by millions of Americans (Eliason, 2008). Hunting is something that has occupied our young country since we got here. It is an outdoors sport that used to be the only way people acquired their food, and many depended on what hunting offered. In recent years, however, hunting has become a very controversial topic. This is in large part due to the overwhelming gun problem this country is facing. But it is also because many people, today, dont understand why people hunt. They do not see how you could find joy out of it anymore. There are others that believe completely otherwise. Some believe that hunting is a part of our culture, and we should continue to utilize the wildlife like we have for so many years. Hunting has become a very controversial topic, and many are not educated on the topic enough to make a decision one way or the other. Hunting, regarded to humans, is essentially the tracking of a certain animals with intentions on killing the animal. For a person that does not know very much about hunting, they may think that this sounds very cruel. However the hunter, usually, has no intentions on torturing the animal. Hunting is considered a sport to many here in the United Sates. That being said, many also do not consider this a sport. Paul Rodriguez, a Mexican Comedian, had this to say about hunting; Hunting is not a sport. In a sport, both sides should know theyre in the game. Even though this is a funny spin off of hunting, it is very relevant. For people that disagree with hunting, this would make a lot of sense. The animal obviously has no idea that it is in the game. However pro hunting advocates think that hunting is more than just a sport. They feel that it is our culture, and that people need to hunt to contain the wildlifes numbers. There are many different feelings on hunting, but the main two thought s either disagree or agree with hunting. There was a time when animals were not as domestically friendly as they are now. People often forget the importance animals played in the survival of humans. Hunting was a crucial component of hunter-gatherer societies, and is a theme of stories and myths, as well as many proverbs, aphorisms, adages and metaphors even today (History of Hunting). Many believe that a form of Persistence Hunting was the first type of hunting (History of Hunting). This type of hunting was used before people had any sort of weapons that could kill an animal from long distances. People would have had to stalk their prey for long periods of time, and get immaculately close to the animal in order to take down their prey. Throughout the ages man became more advanced and engineered guns, spears, and bows. These weapons were made in large part to assist in hunting animals, allowing people to gather food much easier. Times have progressed, and so has the view of hunting. It is important for both sides of the hun ting debate to remember that hunting is as old as the human kind. In todays world the hunting community has begun to decrease substantially, due to regulations and animal rights groups advocating for a change against hunters. However these groups often do not look at the consequences if there were no hunters. One of the greatest positives hunters can provide is this idea of Wildlife Management. This is simply keeping the numbers of animals down. Wildlife management would be severely weakened, in terms of economic and social support, with- out hunting (Peterson, 2004). Another important area of Wildlife Management is the safety of humans. A specific animal that is hunted here in the U.S. is the Whitetail deer. Whitetails are one of the most overpopulated animals in America. It is also important to know that this is among one of the most common animals hunted in the United States. Deer can cause a lot of harm to humans. Overpopulation of deer affects their food intake, and when it is low they venture out into areas they should not, one of these being roads and in turn come into contact with cars. Another negative aspect of numerous Whitetail Deer is that they tend to carry Lyme disease. The blacklegged tick has 3 active life stages (larva, nymph and adult)à ¢Ã¢â€š ¬Ã‚ ¦ most adults feed on white-tailed deer (USDA). If there are too many deer, then there is a greater chance for more widespread amounts of Lyme disease. Hunting is more than just Wildlife Management. For many it is a way of life. People that hunt; feel a certain connectedness to the Wildlife that people who have never hunted could never understand. These are mainly Utilitarianism points of view. They focus on the outcomes, and look at the consequences of the actions. When considering the debate about hunting it is important to understand the ethical dilemmas surrounding the situation. For this specific topic, hunting, there are three concrete ethical categories that can be associated with hunting. These categories that will be examined are; Anthropocentrism, Animal Rights, and Utilitarianism. All three of these ethical categories can be directly related to the hunting issue. All three have their strengths and weaknesses for the argument either against or for hunting. It is important when considering the ethical dilemmas, stemmed by hunting, to look at different ethical categories, because it can provide insight into why people either oppose or support different ethical problems. The first category that will be examined is Anthropocentrism. Anthropocentrism is the view that the only things valuable in themselves are: human beings; their desires, needs, and purposes; and the satisfaction of those (Donahue, 2010). An Anthropocentric perspective would believe that the only thing in this world that really matters, are humans. In this case, by hunting, we would keep the deer population down and prevent any risks that the deer pose to humans. This principle would suggest that hunting would benefit humans instead of benefiting the natural flow of an ecosystem. In contrast to Animal Rights activists views, an Anthropocentric would say that people hunting animals matters more than the wellbeing of the animals. They would say that if there are an abundance of animals, then they could intrude into the wellbeing of humans. They could harm us with disease, and injury. State Farm Auto Insurance does an annual report on how much damage is done between cars and deer collisio ns. The report says that there is an estimated 2.3 million collisions between deer and vehicles that occurred in the U.S. between July 2008 and June 2010, according to State Farm this was 21 percent more than the five years before. (State Farm) The report states that there is an average property damage amount of about $3 thousand per incident. (State Farm) If you do the math it is roughly $7 billion in property damage over the past two year, which is roughly $3.5 billion a year. The point is, if you did not control deer populations through hunting, deer-auto collisions would skyrocket even more, causing more property damage and more injuries and deaths. Anthropocentrism views would see this report and the statistics of it, as extremely harmful to humans. On the other end of the spectrum there are the people that disagree with hunting. In 1991 an animal rights activist, Wayne Pacelle, said Our goal is to get sport hunting in the same category as cock fighting and dog fighting. This is the category of Animal Rights. In the past few years, there has been an increasing amount of pressure from animal rights activists to stop hunting. Many feel that it is a form of animal cruelty. Hunting is increasingly viewed as an antisocial act in contemporary society (Eliason, 2008). Many animal activists work to reduce the amounts of hunting in the country; they also strive to explain to the people whose main concern is not hunting why they should oppose it as well. Animal movement activists seek to stigmatize and mark as deviant what many people perceive as normal, legitimate, mainstream activities such asà ¢Ã¢â€š ¬Ã‚ ¦hunting wild animals for pleasure or profit.(Munro, 1999) Some major animal rights groups include: People for the Ethical Treatment of Animals (PETA), ASPCA, People for Animal Liberation, and many others. Animal Rights activists feel that killing any animal for food or recreation is wrong. It shouldnt matter if the animal is a deer, cow, or chicken. Animal Rights activists considered hunting to be unethical because the human and deer conflict is not the fault of the deer. However it is the fault of humans for taking the habitat away from deer. Animal Rights activists have also advocated for non-lethal methods in animal control. Most notable is Birth Control for deer. Animal Rights advocates believe that it is possible to somehow inject deer with birth control, and in turn they are not as easily able to reproduce. The last ethical category to observe is Utilitarianism. A Utilitarian would believe that hunting offers three benefits. One benefit would be that killing deer for their meat would benefit those who eat venison. Venison is also thought, by many, to be leaner and better for you than beef. It is also important to note that many living in rural areas of the United States need hunting in order to survive. In this tough economy many have expressed that they have lost their jobs, and they have to hunt deer and other wildlife in order to provide for their families. Throughout history hunting deer and other animals is what humans have had to do in order to survive. Another benefit would be that by limiting the population of deer the environment benefits. Overpopulation of deer can create overgrazing, crop reduction, and generally barren land. Utilitarianism would support hunting if it was used for, preserving stability and integrity of biotic communities (Peterson, 2004). Overpopulation of an imals, especially deer, can be very damaging to the ecosystem. With large numbers of deer and other animals, the environment could possibly be damaged by overgrazing. Lastly, a Utilitarian would see a benefit in the fact that deer harbor many diseases. By limiting the amounts of deer, would decrease the amounts of diseases that could possibly be spread to humans. Examining the background of hunting, the pros and cons of it, and the ethical dilemmas surrounding the topic; I believe that hunting should not only be allowed but be encouraged. Hunting does not only benefit the environment, but it also benefits humans. Not all hunting is just for bagging a big buck it is also about the relationship a hunter can acquire with nature. In the hunting world there is also a lot of camaraderie that comes with hunting in the outdoors. It can change the lives of people through spiritual, physiological, and physical means. My father is considered a pro-hunter, so I have some bias for the sport. I have seen how the sport has not only benefited him, but it has grown to be a part of our family. One of the most important things to note about hunting is the fact that these animals were put on Earth for a reason. It is even possible to look at this ethical dilemma in terms of Religious Ethics. As the Bible says in Genesis 9: 2, The fear and dread of you will fall on all the beasts of the earth, and on all the birds in the sky, on every creature that moves along the ground, and on all the fish in the sea; they are given into your hands. (Genesis 9:2). Being a Christian, this is a pretty hard statement to ignore when looking at the hunting dilemma. We have to realize that these animals were put here for a reason, and if we continue to advocate against hunting then we are not using the resources that God has provided us with. Even if you agree with hunting and participate in the hunting of animals, you are still able to understand why some disagree with hunting and what it entails. However many of these disagreements come from people being uneducated with the forms of responsible hunting. Somebody who goes out and hunts for deer and participates in other legal forms of hunting would agree with animal rights views that are against poaching and illegal forms of killing animals. But the fact remains that responsible hunting has more pros than cons. Nobody can deny that the deer population in America is able to grow at an unbelievable rate. The main reason for this is because Deer can adapt to any environment, this is why we see them in our neighborhoods, and in towns. It is also undeniable that overpopulation such as this can be a problem for the environment, and be a potential danger to humans. Responsible hunters can help solve many of these issues. Another thing to note is that in most cases hunting does not inflict any sort of torture on the animal. Animal rights activists have every right to try and defend animals; however they need to make the clear distinction between responsible and irresponsible forms of hunting. Many people are under the impression that hunting is only for red necks out to hurt animals. This could not be further from the truth. Hunting creates a form of camaraderie that some will never be able to understand. When looking at the ethical dilemmas, regarding hunting, it is easy to see why this has turned into such a controversial issue. With the heightened amount of Animal Rights groups, and hunters or supporters of hunters feeling the pressure from these groups there is an inevitable debate. Looking at Anthropocentrism, Animal Rights and Utilitarianism, each category brings something different to the debate. The idea of hunting will never go away. As long as there are people who disagree and agree with this issue, debates will continue to happen regarding hunting. It will also be hard for this debate to go away, because both sides of the spectrum feel very strongly about this particular issue. I will be a firm supporter of hunting until I die, because I have a firsthand take on how positively it can affect the people that participate in hunting. The debate on hunting has many sub sections such as, poaching and gun control. However if you just merely look at hunting and what it can offer hu mans and the environment, it is easy to see how useful hunting can be. As my dad says, I will do all I can to  sustain and grow our  blood sport  until I walk  the  deer woods no longer. (Mikehanback.com)

the miscibility of oil and water

the miscibility of oil and water Introduction: Colloids, of which lipids are usually found in foods in the form, produce stable homogenous state in a condition of a physical mix of different phases of matter. Colloids are important because of the existence in foods, the basis of digestion in human body and the application to the food processing. However, the one of the major concerns about colloids in food and nutrition is how to develop stable mixtures of immiscible lipids and aqueous substances. Considering the aforementioned concern, in the practical, the miscibility of oil and water was examined by making an emulsion which is a stable mix of water and oil and effect of an emulsifying agent, for example, egg yolk on emulsion was also examined. Moreover, a function of lipid involving heat transfer was examined. Objectives: The purpose of the practical is to Determine the miscibility of oil and water by making emulsions in different proportions of oil and water Examine the effect of a natural emulsifying agent as compared to the condition of part A Examine the weight, volume and texture change of prawn crackers through deep fat frying Method: All of the experiments were followed by the procedures listed on page 13 and 14 of Laboratory Manuals Guide 2014. Result: The observations are shown in the following: Determination of the miscibility of oil and water by making emulsions in different proportions of oil and water The tubes (numbered 1 to 7) which were filled with the mixture of different proportions of vegetable oil and tap water and the length of time they took in seconds for the majority (80% volume) of the two phases to clearly separate were shown in the following table. *( The vegetable oil was taken to measure the volume of a major phase) The effect of a natural emulsifying agent as compared to the condition of part A The tubes (numbered 1 to 7) which were filled with the mixture of different proportions of vegetable oil and tap water were added 10 drops of egg yolk solution and the length of time they took in seconds for the majority (80% volume) of the two phases to clearly separate were shown in the following table. #(The tube was added 10 drops of egg yolk solution) *( The vegetable oil was taken to measure the volume of a major phase) The weight, volume and texture change of prawn crackers through deep fat frying The weight, volume and texture of prawn cracker before and after deep fat frying at 180à ¢Ã¢â‚¬Å¾Ã†â€™ for 21 seconds for complete expansion of cracker and the change of its physical properties after the complete expansion of cracker were shown in the following table. # ( The answer was correct to 2 decimal places.) *( It was assumed that the shape of a single prawn cracker surface was a circle.) Discussion: Determination of the miscibility of oil and water by making emulsions in different proportions of oil and water According to the result, the greater proportion of oil contained in tube, the longer time was taken for reversion to the majority (80% volume) of the two phases to clearly separate. It meant the longer time duration for the stable mix of oil and water in homogenous state in all proportion of the mixture in tube that had higher proportion of oil and lower proportion of water. The effect of a natural emulsifying agent as compared to the condition of part A According to the result, the time for reversion to the majority (80% volume) of the two phases to clearly separate in each tube was consistently longer than that in part A when there was an addition of 10 drops of egg yolk solution in tubes that had the same mixture in part A. It meant the prolonged emulsion which was stable mix of oil and water in homogenous state in all proportion of the mixture in each tube. The reason was that egg yolk solution acted as a natural emulsifying agent in the process. The active component of emulsifying agent from egg yolk, lecithin facilitated the dispersion of oil as tiny droplets into another.[1][2] Lecithin covered the surface of the oil droplets and prevented the droplets from coalescing and forming continuous phase.[1] Thus, lecithin acted as a surfactant to lower the interfacial tension at the moment to stabilize the emulsion which was stable mix of oil and water in homogenous state in all proportion of the mixture for longer time. [3] However, non-polar oil molecules and polar water molecules repelled each other later. Since then, the molecules would assembly with other homogenous molecules to decrease the repulsion between molecules. Eventually, there was a separation of two phases. The weight and volume change of prawn crackers through deep fat frying In the practical, the deep fat frying was useful because it fried the prawn crackers very fast and the prawn crackers were not made excessively greasy.[4] The reason of frying the prawn crackers in very short time is the usage of hot fat, for example, oil for cooking. The nature of oil is lipid that can permit the rapid and efficient transfer of heat and can achieve high temperature. Therefore, deep frying can cook the prawn crackers very fast. Moreover, the reason of not making the prawn crackers excessively oily is that the moisture in food repels the oil. The hot oil heats the water within the food and steams the food. The oil cannot go opposite direction of the strong flow because the water vapour pushes the bubbles toward the surface.[6]Finally, oil penetration will become narrow to the outer surface. On the other hand, there is a volume increase in the crackers. The reason is that, during deep fat frying, the prawn crackers are heated and the water in the crackers vaporized into vapour. The vapour formation leads to the expansion of the structure of starch, which is the main ingredient of the crackers. Furthermore, there is an increase in weight in the crackers because of the addition of air into the space of foamed prawn crackers during deep fat frying. Reference: Emulsions and Emulsifiers, Cookingscienceguy.com http://www.cookingscienceguy.com/pages/wp-content/uploads/2012/07/Emulsions-and-Emulsifiers1.pdf Emulsion, Wikipedia 2014 http://en.wikipedia.org/wiki/Emulsion Surfactant, Wikipedia 2014 http://en.wikipedia.org/wiki/Surfactant Prawn cracker, Wikipedia 2014 http://en.wikipedia.org/wiki/Prawn_cracker Deep frying, Wikipedia 2014 http://en.wikipedia.org/wiki/Deep_frying#cite_note-1

Atomic Bomb Essay -- essays research papers

The Atomic Bombing of Hiroshima and Nagasaki The first atomic bomb was dropped on Hiroshima, on August 6, 1945. The world would never be the same. This paper will discuss the significance of the atomic bombs dropped on Hiroshima and Nagasaki and how they led to the success of the Allied forces. It will also discuss how the United States developed the atomic bomb, the decision to drop the bomb, the weakening of Japan, the actual bombing an destruction of both cities, the surrender of Japan and the impact the atomic bomb would have in the future. During World War II, the United States was afraid that Germany would develop the atomic bomb first. Germany had taken over Norway, which was a heavy water supply and Czechoslovakia, which was a uranium supply. Both of these, water and uranium, were needed to make the atomic bomb. Therefore, the United States initiated a top secret program called the Manhattan Project. Even the Vice President didn't know about this project. The Manhattan Project cost over 2 billion dollars. Yet, Congress never voted to fund this program (Hoare, 1987, 10-14). Roosevelt authorized scientists to find out if an atomic bomb could be built. On December 2, 1942, scientists working in a secret laboratory under the bleachers of a football field in Chicago achieved the first man-made nuclear reaction. An atomic bomb could now be developed. Many scientists and other skilled workers participated in the making of the first atomic bomb. However, only few knew what they were making. In 1944, after D-Day, the Alsos (a troop sent to find how far the Germans had come in the building of the atomic bomb) radioed back that they had given up in their attempt to make it. Still, despite scientists' pleas with the President to discontinue it, the U.S. maintained the work on their atomic bomb (Conrad, 1982, 12-16). In Alamogordo, New Mexico, on July 16, 1945, the first atomic bomb was detonated in the desert. The bomb was much more explosive than scientists thought it would be. The 100 foot tower which housed the bomb was totally destroyed by the blast. ("World War II", 1997, 1-2). After the bomb exploded, Robert Oppenheimer, the head of the Manhattan Project, said, "Behold. I have become death, destroyer of worlds." (Hoare, 1987, 18) When Harry Trum... ...p; The United States, as well as the Allied forces, saved many lives by dropping the atomic bomb. The dropping of the atomic bomb, even though it killed hundreds of thousands Japanese people, saved more Americans and other Allied soldiers that would have been killed in battle. The bombings of Hiroshima and Nagasaki may not have been exciting battles, but they may have been the most important weapons used in World War II. If Japan had not surrendered, more atomic bombs may have been dropped and it would be very significant that the United States had made them. Even though only two were dropped, they killed many Japanese, making the government fearful that more would be dropped if they did not surrender (Conrad, 1982, 20-22). When looking back upon the six years of World War II, the three days surrounding the dropping of the bombs in Hiroshima and Nagasaki had far greater impact than all of the battles preceding them. The destruction they wrought far surpassed anything ever seen before. As cited in this paper, the atomic bombs, Fat Man and Little Boy, were pivotal to the success of the Allied forces.

Operation Individual :: Short Stories Technology Papers

Operation Individual A thousand cars, well Computer Assisted Rovers, rode up and down the sky highways of the Upper East Side. Enormous skyscrapers reached to the top of the massive dark sooty heavens that surrounded Chicago, kind of like a bubble that kept them away from the world. The year was 3015, and the world was a completely different place. It was like a metropolitan on speed. Society no longer needed sidewalks, telephones, thanks to video recorded messages, and basically crime, since the Big Brother Project made sure that THEY were watching at every possible moment. Everything was going great except for Operation Artificial Individuals, which was a project designed for the creation of a robot, that looked exactly like a human, thought like one, talked like one, and looked like one. You are all aware of the term artificial intelligence, which is understanding and even placing thought and intelligence into machines. Well since the end of the 22nd century a new term has come out, artificial in dividual or once again A.I., which was coined by Dr. Allan Newell. Dr. Newell who began Operation A.I., created artificial individuals, and mass-produced them for distribution all over the world. Now anyone could have a playmate, a brother they always wanted, and even for the desperate there was the spouse, and at prices that anyone could afford. When they were tested they were immediately approved and found to be very safe and reliable, and just as fast as they were approved they were put onto the shelves for sale. Ten years later they had filled almost half of the city of Chicago, and in many more places around the globe the same thing was happening. What people didn’t know was that the robots had the ability to take over the world if asked to. I know this because I was the one who helped create them; I was working directly under Dr. Newell when we created them. My name is Dr. Mark Altman, and I was the one who programmed them with the ability to do anything that the person with the "key" wanted them to do. See the key was exactly what it sounds like, if you have the key, all you have to do is insert it into the mainframes in his lavatories, type commands, and the artificial individuals would be at your every whim.

Data Collection Essay

* The Rough was excluded during the calculation of the mean as the rough was a trial to indicate the general whereabouts of the end point, which is inaccurate of the exact end point. Table 2. Observations collected during the experiment. Table contains observations which were recorded during each trial of the experiment. Trials Observations Before trials * When water was added to the crystals of oxalic acid, it dissolved almost instantly with a light stirring of the beaker. Rough * When two drops phenolphthalein was added to the solution of sodium hydroxide, the solution turned pink. * After adding about 20.8dm3 of oxalic acid into the sodium hydroxide solution, while swirling the conical flask, the solution turned completely clear – the oxalic acid was filled up to 21dm3 to have a rounded rough end point to work with. 1 * When two drops of phenolphthalein was added to the sodium hydroxide solution, the solution turned pink. * After adding about 20dm3 of oxalic acid solution, while swirling the conical flask gently, each drop of oxalic acid solution began to turn the pink solution slightly clear. * After about 20.6dm3 oxalic acid solution was added, the pink solution turned completely clear. 2 * Two drops of phenolphthalein was added to sodium hydroxide solution, producing a pink coloured solution. * After about 20dm3 of oxalic acid solution was added, each drop began turning the pink solution slightly clear. * After adding around 20.4dm3 of oxalic acid solution, the pink solution turned completely clear. 3 * Two drops of phenolphthalein was added to the sodium hydroxide solution, turning the solution in the conical flask pink. * After adding about 20dm3 of oxalic acid solution, each drop began turning the pink solution slightly clear. * When about 20.3dm3 of the acid was added, the pink solution turned completely clear. Data Processing 1. Write an equation for the reaction. (COOH)2 + 2NaOH –> 2NaCO3 + 2H2O 2. What amount (in moles) of NaOH is present in 20.0 cm3 of 0.097 mol dm-3 sodium hydroxide solution? c = n/v c = 0.097mol dm-3 à ¯Ã‚ ¿Ã‚ ½0.001 = 0.097mols à ¯Ã‚ ¿Ã‚ ½ (0.001/0.097 x 100%) = 0.097mols dm-3 à ¯Ã‚ ¿Ã‚ ½1.03% v = 20.0cm3 à ¯Ã‚ ¿Ã‚ ½0.04 = (20.0/1000) à ¯Ã‚ ¿Ã‚ ½ (0.04/20.0 x 100%) = 0.020dm3 à ¯Ã‚ ¿Ã‚ ½0.2% n = ? n = c x v n = 0.097 à ¯Ã‚ ¿Ã‚ ½1.03% x 0.020 à ¯Ã‚ ¿Ã‚ ½0.2% n = 0.00194 à ¯Ã‚ ¿Ã‚ ½ (1.03 + 0.2)% ? n = 0.00194 mols à ¯Ã‚ ¿Ã‚ ½1.23% 3. What amount of oxalic acid was present in the average volume required to react exactly with the sodium hydroxide solution? Using the molar ratio of 1:2 for acid : base respectively: 0.00194 à ¯Ã‚ ¿Ã‚ ½1.23% / 2 = 0.00097 mols ? amount of oxalic acid present = 0.00097 mols à ¯Ã‚ ¿Ã‚ ½1.23% 4. What amount of oxalic acid was present in your 250 cm3 volumetric flask? Concentration of acid in 250mL is the same as the concentration of acid in 1L. Therefore the concentration of acid in 1 dm-3 of acid solution is the same as concentration of acid in 250mL: c = n/v c = 0.0119à ¯Ã‚ ¿Ã‚ ½2.03% / 0.25 à ¯Ã‚ ¿Ã‚ ½(0.15/250 x 100%) c = 0.0476 à ¯Ã‚ ¿Ã‚ ½ (2.03+0.06)% ? c = 0.05 mols dm-3 à ¯Ã‚ ¿Ã‚ ½2.09% (concentration of acid) c = n/v 0.05à ¯Ã‚ ¿Ã‚ ½2.09% = n / 0.25 à ¯Ã‚ ¿Ã‚ ½0.06% 0.05à ¯Ã‚ ¿Ã‚ ½2.09% x 0.25à ¯Ã‚ ¿Ã‚ ½0.06% = n ? n = 0.0125 à ¯Ã‚ ¿Ã‚ ½ (2.09 + 0.06)% ? moles of oxalic acid in 250mL solution = 0.0125 mols à ¯Ã‚ ¿Ã‚ ½2.15% 5. What is the mass of one mole of oxalic acid? n = m/MM MM = m/n MM = 1.5g à ¯Ã‚ ¿Ã‚ ½0.02 / 0.0125mols à ¯Ã‚ ¿Ã‚ ½2.15% MM = 1.5 à ¯Ã‚ ¿Ã‚ ½(0.02/1.5 x100%) / 0.0125à ¯Ã‚ ¿Ã‚ ½2.15% MM = 120 à ¯Ã‚ ¿Ã‚ ½(1.33+2.15)% MM = 120 à ¯Ã‚ ¿Ã‚ ½3.48% m = n x MM m = 1 x 120à ¯Ã‚ ¿Ã‚ ½3.48% ? mass of one mole of oxalic acid = 120g à ¯Ã‚ ¿Ã‚ ½3.48% 6. How many molecules of water of crystallisation are present in one mole? MM of (COOH)2 = 2(12.01 + 32 + 1) = 90.04 MM of H2O = (2.02 + 16) = 18.02 (COOH)2.xH2O = 120g à ¯Ã‚ ¿Ã‚ ½3.48% ? 90.04 + 18.02x = 120g à ¯Ã‚ ¿Ã‚ ½3.48% ? 18.02x = 120g à ¯Ã‚ ¿Ã‚ ½3.48% – 90.04 ? 18.02x = 29.96à ¯Ã‚ ¿Ã‚ ½3.48% (/18.02) ? x = 1.6626à ¯Ã‚ ¿Ã‚ ½3.48% ? Molecules of water of crystallisation = 1.66à ¯Ã‚ ¿Ã‚ ½0.06 Conclusion and Evaluation Discussion 1. Estimate the degree of uncertainty in your readings using the balance, the volumetric flask, the pipette and the burette. How accurately can you quote your answer? Balance = à ¯Ã‚ ¿Ã‚ ½0.02g Volumetric flask = à ¯Ã‚ ¿Ã‚ ½0.15mL Pipette = à ¯Ã‚ ¿Ã‚ ½0.04cm3 Burette = à ¯Ã‚ ¿Ã‚ ½0.15cm3 The equipments used were relatively accurate as the uncertainties compared to the collected values are small. 2. Compare your answer with the correct answer and work out the percentage error. Percentage error = [(experimental value – actual value) / actual value] x 100% = [(1.6626 à ¯Ã‚ ¿Ã‚ ½3.48% – 2) / 2] x 100% = 16.87% à ¯Ã‚ ¿Ã‚ ½1.74% 3. Suggest any other reasons for possible error. Other reasons for possible error include the uncertainty of equipments, human errors and mistakes, possibility of contaminated solutions, air bubbles and transference of solution between equipments. This experiment was conducted to find the ratio of water in hydrate oxalic acid crystals. This included calculations of the theoretical and experimental values for the ratio of water in the hydrate oxalic acid crystals and the percentage errors of values compared. The equation for the reaction between the sodium hydroxide solution (NaOH) and the oxalic acid solution ((COOH)2) was worked out, with the product being a salt (NaCO3) and water (H2O). As the oxalic acid solution is a dibasic acid solution, the reaction ratio with sodium hydroxide is 1:2. The amount of NaOH, in moles, was also calculated by multiplying the concentration of the sodium hydroxide solution and the volume of sodium hydroxide solution used. The equation c = n/v was used to calculate this. The result was 0.00194 moles of NaOH in the sodium hydroxide solution with an uncertainty of à ¯Ã‚ ¿Ã‚ ½1.23%. The amount of oxalic acid presented in the average volume required to react exactly with the sodium hydroxide solution was also calculated; by dividing the moles of NaOH (0.00194à ¯Ã‚ ¿Ã‚ ½1.23%) by 2, based on the 1:2 reaction ratio stated before. The result was 0.00097 moles with an uncertainty of à ¯Ã‚ ¿Ã‚ ½1.23%. The amount of oxalic acid present in 250cm3 was also calculated. The concentration of acid in 250mL is the same as the concentration of acid in 1L, therefore, the concentration of acid in 1dm-3 of the oxalic acid solution is the same concentration as the acid in 250mL. With this understood, the equation c = n/v was used once again. The ‘concentration’ was first calculated by dividing the moles of NaOH by 0.25dm3. The result (0.05mols dm-3 à ¯Ã‚ ¿Ã‚ ½2.09), was used in further calculations to determine the moles of oxalic acid by multiplying the previous calculated concentration (0.05mols dm-3 à ¯Ã‚ ¿Ã‚ ½2.09) with 0.25dm3, resulting in the moles of oxalic acid in the 250mL solution as 0.0125mols à ¯Ã‚ ¿Ã‚ ½2.15%. This value was used in the calculation of the mass of one mole of oxalic acid. The equation n = m/MM was used in this calculation. The MM (molar mass) was first calculated, dividing the mass of oxalic acid crystals by the moles of oxalic acid (1.5 / 0.0125). The mass (m = n x MM) was calculated with the result of this (1 x 120à ¯Ã‚ ¿Ã‚ ½3.48%), resulting in the mass of one mole of oxalic acid being 120à ¯Ã‚ ¿Ã‚ ½3.48%. Finally, the molecules of water of crystallisation presented in one mole were calculated. This was done by using the mass of one mole of oxalic acid (120à ¯Ã‚ ¿Ã‚ ½3.48%), subtracting the MM of (COOH)2 (90.04) from it and dividing the result by MM of H2O (18.02). The final result of the number of molecules of water in crystallisation equalled 1.66 with an uncertainty of à ¯Ã‚ ¿Ã‚ ½3.48% or 0.06. With this final result, the percentage error was calculated, being 16.87%à ¯Ã‚ ¿Ã‚ ½1.74%. All the uncertainties within the values used were calculated into percentage through dividing the uncertainty by the value and multiplying it by 100%. The uncertainties were converted into percentages before doing calculations were done. There were several limitations found during this experiment which would have been the cause of an inaccurate final result – the variation between the theoretical value of 2 and the experimental value of 1.66à ¯Ã‚ ¿Ã‚ ½0.06. These limitations include the uncertainties of the equipment, human errors and mistakes, possibility of contaminated solutions, air bubbles found in solutions and the transference of solution between equipments. The significance of these errors and the improvements are listed in the table below. Limitations Significance Improvements Uncertainty of equipments Uncertainties were obtained during the experiment through the use of equipments. The inaccurate recording of data would have affected the results in the end. Eg. The readings on the electronic scale weren’t fully stable and consistent at one value, it varied – increasing and decreasing slightly. In the case of the electronic scale, it was suggested that the variation in weight value was due to the air-conditioning blowing down on it. The air-conditioner could be turned off to reduce the uncertainties and variations. Students could also prevent themselves from breathing heavily down onto the scale while measuring, this could have contributed to the variation as well. Human errors and mistakes Mistakes could affect the outcome and accuracy of results. Eg. While adding water into the volumetric flask to dissolve the oxalic acid crystals, a student accidentally added a little too much, over the 250cm3 that was intended. This would have over diluted the oxalic acid. This could have been avoided through patience while adding the water into the volumetric flask. This could also have been done slowly and carefully, probably using a pipette towards the end – at the 250cm3 mark. Reading the measurement of the pipette, burette and volumetric flask could have been inaccurate, causing results to be inaccurate and in turn affecting the calculations. Inaccuracy could have been due to improper way of reading the measurement. Students should have bent down slightly with the measurement at eye level. Student`s heads should not be tilted but level with the equipment as well. The measurement should also be read at the parallax, not above or below it. Possibility of contaminated solutions The experiment was conducted with the use of several different solutions. These solutions could have accidentally been mixed in with each other, causing the solution to be contaminated. The results obtained due to this could have been inaccurate, affecting the final results. Being careful with the solutions used would help avoid this. Using clean equipments for each different solution, making sure the solutions that are not meant to be placed together do not get mixed with each other. After the use of some of the equipments, they were to be washed and reused for another solution. The equipments were not dried before being used again; this could have diluted the solution and contaminated it. Drying the equipment each time after it is washed/cleaned would prevent access water and dilution of solutions. Air bubbles When transferring the dissolved oxalic acid into the burette, there were some tiny air bubbles. This would have because the measurement to be inaccurate as the air bubbles would have caused the reading of the solution to be greater than it actually is. Over time when the bubbles removed itself from the solution which would have caused a decrease in solution. The inaccurate measurement reading would have affected the final results of the experiment. The burette could have been left alone for awhile to allow the bubbles to float to the top. Whatever the amount the bubbles made up for, fill the burette up again with the use of a pipette. Transference of solution between equipments When transferring solutions between two or more differing equipments would have caused an increase of decrease in measurement. An inaccurate amount of solution would have affected the results or recorded data. When using a funnel during the transference of solution into the burette, it caused some increase in the desired amount. This is due to the tip of the funnel having some drops of solution left in it and when the funnel was removed, the movement could have caused those drops to drop into the burette, causing an increase in amount of solution. This could be prevented by either slowly removing the funnel or using the funnel up to a certain mark, remove it and fill up to the desired amount with the use of a small pipette – drop by drop. When using the 20mL pipette to transfer the sodium hydroxide into the conical flask, the tip of the nozzle had a drop that was tempted to drop out of the pipette. Avoid touching the sides and move the pipette over the flask slowly would reduce the chances of it dripping out and altering the volume of solution. A small amount of the solution was also stuck at the tip of the nozzle after being emptied. By touching the tip to the side of the flask would help that tiny bit of solution flow out. If possible have the nozzle flat on the side of the flask, this would allow it to flow out smoothly. To avoid or reduce these significant errors, these solutions and improvements should be taken into consideration during future repetition of this experiment. The experiment overall was invalid. Though the values in data collection may have been to a 0.10cm3 difference, the final calculation of the percentage error, 16.87%à ¯Ã‚ ¿Ã‚ ½1.74%, was much greater than the desired 1% causing the experiment to be invalid.

Green technology

Green Technology: Past, Present and Now Sheilamarie Luzader INF103: Computer Literacy Edward Bakker August 5, 2013 What is green technology? â€Å"Green Technology is the development and application of products, equipment and systems used to conserve the natural environment and resources, which minimizes and reduces the negative impact of human activities. † (kettha. gov/. my/en/content/defintion-greentechnology) Green technology is extremely important for the planet and us, as human beings.Green technology has given people the opportunity overcome the reaping of natural resources and to build p the environment that the human race is consistently tearing down and damaging. Everything has a cause and reaction. Because the human race is exhausting the natural resources that the earth is providing, we are becoming reliant on something that is not going to last forever. Green technology gives the opinion to find alternatives that will be more environmentally sound and will improve life itself.Within this paper, I will cover green technologies history, what green technology is doing during the present day and what is to come in green technology and what you can do to make an impact. Many people fail to realize that green technology has been around for a very long time. Although, people in that time did not realize that they were being environmentally friendly. They were simply exploring ways to meet their needs. Many things helped pave the way for Green technology and simply then a better way of doing things and a way to live better from forms of solar power, windmills, to the power of steam, and even electric cars.The power of the sun has been used probably since the beginning of time. In 1839, Alexandre Edmond Becquered discovered a photovoltaic effect which is the process of electricity generated from the unlight. Over a hundred years later another major breakthrough comes from Calvin Fuller, Gerald Pearson and Daryl Chapin discovered the Silicon Solar Cel l, in 1953. After this, around 1956, many things start to change. Solar cells are then being put into everyday objects like toys and radios. To major accomplishments, like the first spacecraft being powered by solar cells.This spacecraft, Soyuz 1, was launched in 7 From then on, solar power took ott in a slow but never ceasing climb. From to 1990, solar began powering railroad crossings to powering houses. Another major ilestone solar energy has passed is a solar car in 1982 created by Hans Tholstrup, the â€Å"Quiet Achiever. † To think that then there were energy sources that one could never run out of. Just like being able to harvest the power of the wind. The first windmill was reportedly in Persia in 7 A. D. They used the windmills to water their crops. This passed on through Asia and spread to Africa and other surrounding areas.The Dutch in the 14th century created the tower windmill with the larger lattice work arms with the stretched canvas across. This is the windmil l that many people picture when they think of a windmill. With this design, they were now able to move larger amounts of water to where they needed water. By the 19th century the windmill count was a s high as 30,000. The windmill craze caught on in America and spread throughout the Great Plains. The peak time for windmills was from about 1880 to 1935. During this time many farmers relied on these windmills to bring the water.Without water, they have no crops and no life essentially. In 1930, the windmill can to a massive roadblock that halted windmills as they knew it back then. The Rural Electrification Administration made it possible to pump 20 to 30 gallons of water with a simple electric pump. This killed the windmill. In the mix of windmills and the Industrial Revolution came steam power. In 1698, Thomas Savery coined the first steam powered pump. This then was improved by combining that with pistons and cylinders by Thomas Newcomen and again by James Watt.Steam power made it possible for factories to be anywhere. Whereas, windmills and water power had forced factories to be by large bodies of water. This sparked the industries to use steam power for everything from textile work to metalworking. James Watt lay claim to the term â€Å"horsepower. † He believed that with these steam engines he could replace how many horses? So from there it became 4 horse power, 5 horsepower and so on. Steam power really laid the ground work for many great inventions to come. The first steam powered locomotive was first put on track in 1804. This was a major step.Goods could now be transported by other means then animals and humans. The United Sates put a steam engine on a ship Just 3 short years later to make a 150 mile Journey. Steam power had been pushing society into a new level of transportation, labor and leisure. This green way of doing things slowly faded away with the coming age of the electric motors and internal combustion engines. Electric otors were als o a green alternative to other engines that were not environmentally friendly. The first electric car is unknown. However, there are many individuals that made a remarkable impression of this fad.In 1828, †¦nyos Jedlik designed and invented an electric powered car. From then Robert Anderson, Professor Stratingh and his assistant Chistopher Becker and Thomas Davenport also invented an electric powered car. William Morrison's design however made electric vehicles more practical with the capability of having a passenger. This pioneered the way for the first commercial taxi fleet in New York City, in 1897. Electric vehicles had many perks. For instance they did not smell bad, have bad vibrations and were not a loud as a gas powered vehicle. They were green and did not even know it.Many people do not even see this history as a green history, because they believe green technology to be a 21st century kind ot technology. Many people these days are blinded by society to see what is rig ht in front of them, green technology and the importance to our world and communities it brings. To move forward in this technologically advanced world, as inhabitants of the Earth we need to look back to these unattended green advances nd learn from them. We have to revert back to technologies like those in order to save our planet and mankind. We need to learn to become eco-friendly to save what little â€Å"eco† we have left.In todays society, there are many green technologies out there from solar power and other renewable energy sources, hybrids and electric cars, and energy efficient appliances. Solar technology is by far the technology to take society to the next level of green thinking and a better way of life. Solar energy can provide electricity, can heat a house, and it can also save money from both a residential stand point to a ommercial perspective as well. Road signs and lights are also going green and using a solar powered systems to generate the power they nee d. This saves the government money as well.Going green and using renewable sources not only helps your wallet stay full, but it helps the environment as well. By using solar power, greenhouse gases and other air pollutants will decrease which in turn will be greatly beneficial to the environment. Here is a chart that shows the U. S. ‘s energy consumption: As we deplete the natural resources our plant has to offer, mankind needs to find a etter solution to bring down the petroleum, natural gas, and coal consumption to help clean up our environment and improve our quality of life. What humans pull from the ground is not an endless supply.This is a harsh reality that society needs to grasp in order to move forward into an eco-friendly way of life, which will be needed in the coming future. Not only do we need to cut energy consumption in our homes, but in our vehicles as well. Hybrids have come a very long way. They built the automobile industry from the ground up. Starting from steam to electric to gas guzzling SUVs, as a whole we have went forward by going backwards. The early concepts were not to save the environment and reduce pollution, they were simply a form of transportation.Nowadays, people want the fastest, coolest car no matter the price and what the repercussions are for owning a car that is not eco-friendly. Who cares if your car emits gases that are harmful to the environment or to yourself? Who cares if we use up all the oil in the world? My answer: We all should! If we Just take and take and give nothing in return to the Earth, where will we be in 50 years? A small change that can significantly improve our environment is our cars. Hybrids cars still use gasoline but to a much small scale and the back lashes from driving one is significantly better on our environment than a regular gas guzzling car.Many people are making the switch to hybrid cars. Not only are these cars fuel efficient, but can one day lead to a cleaner and brighter future. B elow is a chart of hybrids bought from 1999 to last year 2012. This Chart from http://www. evsroll. com/ Hybrid_Car_Statistics. html really puts in perspective that now over a million hybrid cars have been bought since the slow start up or reintroduction of hybrid cars in 999. Along witn hybrid cars, a new wave ot appliances nave been making their way to the green scene. Energy efficient appliances may not seem like much, but in all actuality they can help a lot.An average house hold can cause Just as much pollution if not more than a gas powered car every year. How you may ask? Because the power plants we use to power our homes burn fossil fuel and the more energy we consume, the more fossil fuel that is burned that goes directly into our environment. When we purchase energy efficient appliances the less energy we use. This in turn causes the power lants to not burn as much fossil fuel right into our environment. These products will also help save money on utility bills as well. By using energy-efficient appliances, households can save up to $400 per year on utility bills. (EarthEasy)† With the advancing green technologies from hybrid cars to energy efficient appliances, there are many more to come in the future. Although one cannot predict the future, we can predict that green living and technologies will be on a slow uphill battle to gain support and usage throughout the world. In a sense, the fate of the world rest on these kinds of technologies, because e need to find a way to live in harmony with nature and not completely suck it dry. The future is soon coming with green technology.As a society, we are Just now getting on to the solar panels and their systems. However, there is a Norwegian company, EnSol AS that has created a solar spray that goes on regular windows on a house. In some sense it is like putting Windex on the windows and not wiping it off. This transparent spray is that convenient that one cannot even tell the spray is there. This te chnology is going to bring solar power to many people because it has become so easy and convenient. I believe that with that there will be more technology that can make green technology easier and more convenient for consumers to use.I also believe that in the coming years the hybrid car market will skyrocket and continue to evolve to create cars that are more eco-friendly. I want to believe as a society we will become more environmentally aware of what is happening and what we can do to stop it. As individuals there are many ways to help by doing little things that we can control. Unplugging your appliances when they are not in use, will bring down energy costs and will eliminate wasted power. By composting your waste, you are giving back to environment and reducing waste because you are recycling for instance to a garden, that will help plants grow.A major component that everyone can do that will reduce plastic waste is to stop buying plastic water bottles and buy a water bottle t hat is reusable. Switch to Compact Fluorescent Light bulbs, these light bulbs can cut cost of energy and be a safer and efficient light source. Taking short showers and use cold water when washing your clothes are Just some more simple ways to cut energy costs. To help the environment more walk or ride your bike, instead of driving. Instead of putting pollutants into the air, you can get exercise in and enjoy time outside.Another key component would be to recycle every chance you get. All the little stuff adds up to the bigger picture. Also to recycle electronics the right way. Do not throw them away in the garbage. There is special places you can take your electronics to recycle. And finally, turn off the lights. When you leave a room do not leave the light on, this is Just plan wasteful and throwing money right out the window. Within this paper, I covered green technologies history, what green technology is can do to make an impact. Green technology is our future and our way to ma ke a better, safer and healthier environment.http://www.hybridcars.com/history-of-hybrid-vehicles/http://www.backwoodshome.com/water-pumping-windmills/http://www.worldwatch.org/resources/go_green_save_greenhttp://www.huffingtonpost.com/2009/07/21/top-10-green-countries-ph_n_241867.htmlhttp://www.alternet.org/election-2016/trump-tv-ratingshttp://www.sciencefocus.com/article/future/exciting-new-green-technology-futurehttps://www.pluralsight.com/blog/life/green-tech-past-presenthttps://www.treehugger.com/htgg/how-to-go-green-in-the-community.htmlhttp://time.com/section/health/http://www.amerlux.com/content/press-releases/files/Amerlux_Energy_Observer_8-131.pdfhttps://www.greentechmedia.com/channel/gridtech/events/live/the-networked-ev-2011/articles/read/Solar-Dumping-Claim-CASM-Responds-to-CASE-and-CPIA/P3235http://www.livescience.com/2612-steam-engine-changed-world.htmlhttp://www.livebinders.com/play/play?id=1792348