The physical property Essays

The physical property Essays The physical property Essay The physical property Essay In conclusion it was found that the stiffness of the specific sample of steel used was. Stiffness is the physical property of being hard to bend. It was assumed that the blade was made up of steel. According to engineeringtoolbox.com/young-modulus-d_773.html the psi value for the different types of steel at 21 ranges from 27-30. Assuming that the room temperature was approximately 21, and the type of steel was nickel steel, it can be said that the 28% difference between the actual and calculated values in this experiment is acceptable, since it was not known what specific compound of steel the hacksaw blade was made up of, or what the exact temperature of the room was. As seen on the graph, the stiffness was found when T^2 was graphed against X^3, and the slope was taken and then substituted into the equation. The second point on the graph was labeled as a random error, and the slope of the line did not take into consideration that point. The random error occurred most likely because of human error, more specifically, not being able to count exactly 5 oscillations. It is likely that 4 oscillations were counted and therefore there was a decrease in time when compared with other values. There were quite a few limitations in the procedure. First of all, it is nearly impossible to count exactly five oscillations. There is always a human error, because it is impossible to tell where exactly the oscillation starts, and where exactly it ends. Along with that, the human factor also affects the data, because it is impossible to start a timer at exactly where the oscillation starts, and at exactly where it ends. But it could be said that the delayed reaction time in the beginning and in the end cancel each other out. Another limitation was the fact that only the mass of the magnet was taken into account. Ideally, both the mass of the magnet, and the mass of the hacksaw blade sticking out from the clamp would be taken into account. The biggest limitation of all was not knowing what exact material the hacksaw blade was made up of. This in turn made it difficult to compare the experimental value to an actual value. Another limitation was not knowing the temperature of the room, because as temperature increases the stiffness of the steel decreases. There a number of ways these weaknesses can be addressed. First of all in order to be able to count an exact number of oscillations, a high quality video camera can be utilized. By slowing down the video it can be found with reference to the recording time, when one oscillation started and where it ended. In order to take into account the mass of part of the hacksaw blade; the whole blade would have to be weighed first and its length measured. A ratio can then be used according to how long the distance is from the clamp to the end of the blade, and then a mass can be of the specific part of the hacksaw blade. This is of course assuming that the mass of the hacksaw blade is spread out evenly. Next time, a specific compound of steel should be used; this in turn would allow the calculated values to be compared to the actual values. The temperature should also be recorded during the beginning and the end of the experiment, because that has to be taken into account when comparing to actual values. Young Modulus of Elasticity for Metals and Alloys. Engineering ToolBox. 08 Mar. 2009; www.engineeringtoolbox.com.

The Hunger Games Book One Review

The Hunger Games Book One Review In The Hunger Games, author Suzanne Collins has created a fascinating dystopian world. The Hunger Games is a compelling novel focusing on life in an authoritarian society in which young people must compete to the death in the annual Hunger Games. The main character, 16-year-old Katniss Everdeen, volunteers for the Hunger Games to keep her younger sister from being required to participate and her experiences and fight to survive are the heart of the book. Reading The Hunger Games can lead to interesting discussions about our own world and how reality shows, threats of war, authoritarian governments and obsession with fashion trends influence us daily. Due to the darkness of the story, it is best suited for teens and adults rather than tweens, although many younger kids have read the book or seen the movie or both. Panem: the World of the Hunger Games Trilogy While the creation of Panem is not fully fleshed out until the second book, we know that this authoritarian society was the result of a horrible disaster during the Dark Days, resulting in the establishment of twelve districts under the rule of the government in the Capitol. Peacekeepers and a local government are instituted in each district, but the rulers in the Capitol have strict control over everything and everyone in each district. Each district has its own specialty that benefits the Capitol, such as coal mining, agriculture, seafood, etc. Some districts provide the Capitol with energy or material goods and some provide the manpower to keep those in the Capitol in power. The people who live in the Capitol contribute little to their own sustenance and are concerned mainly with the latest fashions and amusements. The Hunger Games are an annual tradition directed by the Capitol rulers, not only to amuse the citizens  but also to preserve control over the districts by demonstrating the Capitols dominance. Each year, the twelve districts must send two representatives, a girl and a boy, to participate in the Hunger Games. These representatives are called â€Å"tributes† to make people believe that representing their district is an honor, even though each person lives in fear that someone they love will be chosen. And the entire nation must watch as these 24 tributes battle each other to the death until only one is left as the victor. Having a victor is important to a district - extra food and a few luxuries will be granted to the winners district. The government has created the ultimate reality show, complete with technological challenges and constant monitoring of the movements of the participants. Each citizen is required to watch the Games until their conclusion, which may take hours or days. Summary of the  Story Sixteen-year-old Katniss Everdeen has been providing for her family since her father’s death in a mining accident. She has done this by illegally hunting beyond the boundaries of District 12 and using the game she kills for food or for barter. Through her skill with a bow and her ability to track and snare rabbits and squirrels, her family has been able to survive. They have also survived because Katniss signs up for the tessera, a ration of grain that is given in exchange for placing your name in the lottery for the reaping, the ceremony that determines who will be the district’s representative in the Games. Everyone’s name goes in the lottery from the time they reach the age of 12 until they turn 18. Each time Katniss exchanges her name for the tessera, her chances of being the one whose name is called increase. Only it isn’t her name that is called it is her sister’s. Prim Everdeen is the one person that Katniss loves above all others. She is only 12, quiet, loving and on her way to being a healer. She would not be able to survive the reaping and Katniss knows this. When Prim’s name is called, Katniss immediately volunteers to take her place as a tribute from District 12 to the Hunger Games. Katniss knows that it is not only her own life on the line in the games, but that others will benefit as well if she is the victor and her skills as a hunter will give her an edge in the Games. But her life as a tribute becomes more complicated by the other tribute from District 12. Peeta Mellark, the baker’s son, is a boy that Katniss owes a favor because of a kindness that he showed her when she was most desperate and her family’s survival was at stake. And Katniss knows that now her survival will mean his death. Katniss is whisked away from her family and Gale, her best friend and hunting partner, to the Capitol, where she is prepped and primped to participate in the Games. She and Peeta are to be mentored by Haymitch, the only tribute that District 12 has had who was a winner of the Games. But Haymitch is a reluctant and seemingly inadequate mentor, so Katniss realizes she must rely on her own strengths in order to survive. As the first book of the trilogy, The Hunger Games is compelling reading and makes the reader want to read the next book immediately to find out what happens to Katniss and Peeta. Katniss is a strong character who solves her own problems and takes charge of her own life. Her struggles with her divided affections between two boys are realistically portrayed but not overwrought. And her tendency to inadvertently create problems can spark many conversations about whether she was right or wrong and whether she stayed true to who she is. Katniss is a character that readers will not soon forget. About the Author, Suzanne Collins With the Hunger Games trilogy, Suzanne Collins, award-winning author of the Underland Chronicles, brings her talents to a new trilogy aimed at a more mature audience than her books about Gregor, the Overlander. Collins was named one of Time Magazine’s 100 Most Influential People in 2010, an honor that was based on the popularity of the first two books in the Hunger Games trilogy. In its popularity and impact, the trilogy has been compared to other popular fantasy novels for young people, such as the Twilight series and the Harry Potter series. Collins’ experience as a television writer enables her to create stories that appeal to tweens and teens. Suzanne Collins also wrote the screenplay for the movie adaptations of The Hunger Games. Review and Recommendation The Hunger Games will appeal to teens, ages 13 and up. The 384-page book contains violence and strong emotions so younger tweens may find it disturbing. The writing is excellent and the plot propels the reader through the book at a rapid rate. This book has been chosen by Kansas State University to be given to all of the incoming freshmen to read so that they will all be able to discuss it throughout the campus and in their classes. It has also become assigned reading in many high schools. The book is rich in discussion points not only about governments, personal freedom, and sacrifice but also about what it means to be yourself and not submit to society’s expectations. For information on challenges to the book, see The Hunger Games Trilogy. (Scholastic Press, 2008. ISBN: 9780439023481) Edited March 5, 2016 by Elizabeth Kennedy Disclosure: A review copy was provided by the publisher. For more information, please see our  Ethics Policy.

Anthropology. Evolution Assignment Example | Topics and Well Written Essays - 750 words

Anthropology. Evolution - Assignment Example The holistic foundation provided by it and distinct characteristics of every culture makes it distinguishing criteria and allow other fields of anthropology to revolve around it. A critical analysis of all these subfields helps in understanding that these areas provide an individual account of human history belonging to same era. Where cultural anthropology provides a comparative analysis of cultures all around the globe, physical/ biological anthropology provides details of evolution that this culture and its followers have shown over the period of time. Similarly, evolution of linguistics is considered as an important tool of examining changes in culture as language is a distinct characteristic of every human society. On the other hand, archeology refers to examination of past and present cultures and their physical remains. All these fields when tied together provide a detailed yet multidimensional account of one particular era of human history. Another major tying element is the disciplinary holism of anthropology (Harris, 1997). This method allows anthropologists to question why all these subfields are tied together in anthropology. This inter-relational nature of anthropology asserts that this study is a system-oriented phenomenon. Therefore, changes in one part of the society helps in examining changes the other parts went through. Examining a relationship between environment and humans helps in understanding the changes culture went through over the period of time and its related consequences on other dimensions of anthropology. Question 2 There are various types of evidences that support the phenomenon of evolution that living beings have experienced over the course of time. Some of these evidences include biogeography, functional morphology, paleontology, comparative embryology, animal and plant breeding and other molecular evidences (University of Arizona, 1996). These evidences can be categorized into direct observation, homology, vestigial traits a nd compensatory design, and fossil fuel records accordingly (Coyne, 2009). Evidences obtained through biogeography were based on examination of fossil remains which indicated that organisms present in isolated areas bear nearly same characteristics as those present in the mainland. On the other hand, functional morphology was based on evidences derived through examination of vestigial organs. Despite non-functional nature of these organs, there are various species that contain vestigial organs like pelvic bones in whales and tailbones in humans. Fossils also provide a detailed account of morphology. They contain records of simple structures that have shown evolution over the period of time and have developed into complex structures with different transitional forms. Comparative embryology helps in examining similar traits in embryos of different species at early stages (University of Arizona, 1996). This notion supports the idea of homology in different species. Such homology can al so be supported through genetic evidences and similar construction of body parts in different species which further helps in identifying their common ancestors. As far as examination of animal and plant breeding is concerned, it supports the phenomenon of artificial selection that lead to differentiation between domesticated and wild living beings. Simple example of this concept can be domestic breeds of dogs, cats and pigeons that have common ancestors as the wild animals however they bear various distinct physical and behavioral characteristics. Question 3 There are various evidences that indicate humans being a typical primate. A primate is expected to have distinct characters that distinguish it from other

Two Techniqyes in Hospitals Laboratory Essay Example | Topics and Well Written Essays - 2000 words

Two Techniqyes in Hospitals Laboratory - Essay Example This paper summarizes each of these methods and provides examples of their relevance to biomedical research and clinical medicine. Flow Cytometry Analytical flow cytometry (AFC) is used to assess the biochemical composition of cells using an optical scanner in the assessment of individual cells as they are screened individually at a rapid rate (approximately 100 cells per second) through an optical scanner (Boddy et al 2001; Givan 2001). This methodology permits quantitative measurements of molecular components within each cell individually (Davey & Kell 1996; Givan 2001). An important medical use of AFC is the identification of specific strains of infectious bacteria in infected cells obtained from patient biopsy (Boddy et al 2001). Once the pathogen is identified, AFC is also used in therapeutic assessment of antibiotics on the clinical course of infection by examining patient cells by AFC post-treatment. In this regard, AFC is an important biomedical tool in the assessment of para meters of clinical sensitivity and resistance of specific bacterial strains to specific therapeutic regimens (Davey & Kell, 1996). In addition, AFC can be used to measure the cellular DNA and protein concentration and the activity of specific enzymes (Roederer 2001). The capability of AFC to assess molecular content within individual cells involves the use of fluorescence measurements to characterize the biochemical components of cells. In this technique, fluorescent probes are applied to specific cell molecules which are then assessed via the detection of optical excitation patterns emitted by these optically labeled cell components. (Shapiro 2003). These optical excitation patterns emitted by the fluorescently labeled cell components can be used to pinpoint specific types of molecules and to quantitate their concentrations within the cell (Shapiro 2003). This accuracy is facilitated by the standardization of controlled flow by means of hydrodynamic focusing methods (Shapiro 2003). Further analytical sophistication can be achieved by the use of multiple optical beams and two channel detectors to detect two different cellular signals at the same time in the same scan while providing a high sensitivity (Zhong et al 2005). Labeled nanoparticles are also be utilized as probes in the molecular assessment of cell composition (Zhong et al 2005). In addition to biochemical composition, AFC can be used to assess cell proliferation by means of accurately identifying cell cycle composition of dividing mitotic cells. This assessment can be carried out in individual cells (Pozaroski & Darzynkiewicz 2004). This method requires the DNA binding dye propidium iodide (Shapiro 2003). DNA and protein content can be assessed simultaneously in individual cells by means of bivariate analysis and comparisons between normal cells and tumor cells (Pozaroski & Darzynkiewicz 2004). This technique also permits the evaluation of cell viability on an individual basis and can distinguish ce ll death resulting from apoptosis versus necrotic mechanisms (Bertho et al 2000). Apoptosis results in a characteristic cell fragmentation into small apoptotic bodies containing fragmented DNA segments; this process can be detected by AFC and distinguished from plasma membrane degradation which is characteristic of necrotic cell death mechanisms. Cell viability measurements are an important component of disease assessment with regard to the identification of pathogenic mechanisms that may cause cell

Philosophies of Socrates, Plato, and Aristotle Essay Example for Free

Philosophies of Socrates, Plato, and Aristotle Essay The philosophies of Socrates, Plato, and Aristotle had different points of-view but they were also similar in some ways. For example, all three philosophers had their own thoughts on the subject of justice and government. Socrates belief on this matter was that democracy was an unwise form of government. He thought that the electing of the people was unfair justice. Plato had some of the same beliefs. He believed that government should only have rulers who had the intelligence and education appropriate for the matter. His thoughts were that a job should be done only by those who are best suited for it. To him aristocracy was a perfect form of government. The point of Socrates philosophies were to make people think about the questions he would often ask. The reason for these questions being asked were to have people to their own thoughts and opinions toward life. He did not think a person with the right mind should follow the steps of their ancestors. Instead of going around asking questions, Plato, another philosopher, would write his own conversations with imaginerary people. These conversations would cover much of the same topics that Socrates had tried to cover earlier. These topics mostly dealt with life such as government, opinions toward justice and how people really viewed education. Aristotle also had his own theories towards his belief of the right government. He wanted his results to show happiness among the people. Hed mainly collect information from studying living creatures and observing their living habits. He would do this so that he could see what brought them happiness. His opinion toward life was that all people should live a fair and happy life. After many attempts of forming the perfect government , his facts allowed him to believe that a perfect government could be formed only by those who have a middle class. The middle class would consist of those who were not rich yet not poor. Both Aristotle and Plato had different thoughts on the division of the government. Aristotle claimed to believe that a government should consist  of many classes for the protection of the people and the state. While Plato disagreed and thought that dividing of power was unfair and cruel. In his mind, he felt that those in the lower class could never have the chance to get any higher in life. Though all three philosophers felt that the government should be based on the equalness of all the people, they all had different views on what equality really meant. These philosophers all had their own way of gathering information and passing it through the minds of others.

Biography On Julius Caesar :: essays research papers

Julius Caesar A Man of Great Stature Julius Caesar was a strong leader of the Romans who changed the course of the history for the Roman world decisively and irreversibly. With his courage and strength, he created a strong empire and guided the empire for almost 20 years. His life was short, but had many adventures. I will tell of some of this man’s remarkable life. He did many things, therefore, I will only discuss a few. His name, part of his reign, one of his greatest battles, and his death will be told. Julius Caesar was born on the 13th day of the month Quintilis (now July) in the year of 100 B.C. His full name was Gaius Julius Caesar, the same as his father's name. Gaius was his given name and Julius was his surname. Caesar was the name of one branch of the Julian family. Its original meaning was "hairy.† Caesar's family was not prominent, but they claimed to be descended from Venus as well as the kings of Alba Langa. In spite of that fiction, Caesar was well connected through his relatives and received some important government assignments during his youth. Julius Caesar was the dictator of Rome from 61-44 BC. At the time of his birth, Rome was still a republic and the empire was only beginning. Caesar made his way to be considered a head of Rome by 62 BC, but many of the senate felt him a dangerous, ambitious man. The senate did their best to keep him out of consulship. He finally became consul in 59 BC. In Caesar, they saw only the threat of a king, a word that was l inked with the word â€Å"tyrant† that is cruel or unjust rule. One of Caesar’s greatest victories in battle was just after he had gained control over the lands of Bituriges, Vercingetorix. He started to lead his army to the Boii oppidum of Gorgobina, another city under his control. On the way, he stopped his troops at Vellaundunum, oppidum of the Senones, and set up siege. He did not want to leave any enemies behind him who might get in the way of the grain deliveries and supply. The Carnutes, one of Rome’s enemies, had just heard of the siege at Vellaundunum. They gathered troops to Garrison Cenabum, the Carnutes stronghold. Caesar’s army camped out right in front of the fort. Biography On Julius Caesar :: essays research papers Julius Caesar A Man of Great Stature Julius Caesar was a strong leader of the Romans who changed the course of the history for the Roman world decisively and irreversibly. With his courage and strength, he created a strong empire and guided the empire for almost 20 years. His life was short, but had many adventures. I will tell of some of this man’s remarkable life. He did many things, therefore, I will only discuss a few. His name, part of his reign, one of his greatest battles, and his death will be told. Julius Caesar was born on the 13th day of the month Quintilis (now July) in the year of 100 B.C. His full name was Gaius Julius Caesar, the same as his father's name. Gaius was his given name and Julius was his surname. Caesar was the name of one branch of the Julian family. Its original meaning was "hairy.† Caesar's family was not prominent, but they claimed to be descended from Venus as well as the kings of Alba Langa. In spite of that fiction, Caesar was well connected through his relatives and received some important government assignments during his youth. Julius Caesar was the dictator of Rome from 61-44 BC. At the time of his birth, Rome was still a republic and the empire was only beginning. Caesar made his way to be considered a head of Rome by 62 BC, but many of the senate felt him a dangerous, ambitious man. The senate did their best to keep him out of consulship. He finally became consul in 59 BC. In Caesar, they saw only the threat of a king, a word that was l inked with the word â€Å"tyrant† that is cruel or unjust rule. One of Caesar’s greatest victories in battle was just after he had gained control over the lands of Bituriges, Vercingetorix. He started to lead his army to the Boii oppidum of Gorgobina, another city under his control. On the way, he stopped his troops at Vellaundunum, oppidum of the Senones, and set up siege. He did not want to leave any enemies behind him who might get in the way of the grain deliveries and supply. The Carnutes, one of Rome’s enemies, had just heard of the siege at Vellaundunum. They gathered troops to Garrison Cenabum, the Carnutes stronghold. Caesar’s army camped out right in front of the fort.

Flame Test Lab Write-Up

Sydney Schell October 18th, 2012 Identifying Metallic Components Introduction: Spectroscopy is the study of the electromagnetic radiation emitted or absorbed by the atoms and molecules. A photon in short is light. Atoms produce light by putting energy in, the electron then becomes excited and goes up an energy level, the electron then falls back down to its ground state, and out comes a photon (light). The electromagnetic spectrum contains color that we can and cannot see.The color blue has the highest energy with shorter wavelengths and a higher frequency while the color red has the lowest amount of energy with long wavelengths and a shorter frequency. Hypothesis: If you observe the characteristic emission spectra of several gases and metallic ions then you can identify the metallic component(s) of an unknown substance based on flame color. Materials: * Samples of the following metallic salts * Calcium chloride * Copper chloride * Iron chloride * Lithium chloride * Potassium chlorid e * Sodium chloride * Strontium chloride * Unknown 1 * Unknown 2 Bunsen burner and accessories * Safety goggles * Lab apron * Splints soaked overnight in distilled water * 250 mL beaker half full of distilled water Procedures: 1. Place the end of one of the popsicle sticks soaked in a solution into the flame. Note color(s) of the flame and the duration of each color. Immerse the wooden splint in the distilled water to fully extinguish it, and then discard it in the trash. Record your results. 2. Repeat step 4 for each of the remaining salts. 3. Repeat step 4 for each of the unknown metals and predict the identity of the unknown metals.Repeat any of the known metals to help with this prediction. **Wash hands thoroughly before leaving the lab. ** Some of the salts used are poisonous or irritating to the skin. Keep your hands away from your mouth until after you have washed them and have let the laboratory. Results/Data Collection/Analysis: The calcium chloride had a pretty average wav elength and turned the fire green. For some reason CuCl and NaCl both burned orange, coming in with the second lowest energy. Iron chloride had a â€Å"sparky† appearance that lasted for approximately six seconds and it was concluded that it had a high energy.Lithium chloride burned a pinkish color. Potassium chloride had a high energy and produced a purple flame. Strontium chloride had the lowest energy which was determined by red color of its flame. Unknown 1 was strontium chloride and unknown 2 was calcium chloride. The unknowns were found by comparing their flame colors to the known substances. Formula| Metal| Color Observed| Duration(sec)| CaCl2 | Calcium Chloride| Green| N/A| CuCl| Copper Chloride| Orange| N/A| FeCl3| Iron Chloride| Sparkle| 6 sec| LiCl| Lithium Chloride| Pink| N/A| KCl| Potassium Chloride| Purple| N/A| NaCl| Sodium Chloride| Orange| 30 sec|SrCl2| Strontium Chloride| Red| N/A| Unknown 1| Strontium Chloride| Red| 8 sec| Unknown 2| Calcium Chloride| Green | N/A| Questions: 1. What was (were) the identity of the metal ion(s) in the unknown solutions? Give evidence. -Unknown 1 proved to be strontium chloride because they shared the same flame color. Unknown 2 turned out to have a green flame which matched it up with calcium chloride. 2. Predict the flame color if metallic ions of copper and strontium were mixed. -Strontium and copper together should make a red orange or orange red depending on what the dominate color is. 3.Based on the flame colors in the experiment, which single element would most likely be used to produce yellow fireworks? Why? -Iron would most likely be used to make yellow fireworks based on the sparks it has originally have a tannish/yellow color to them. 4. Why do the metals give off light? -When the metals are rammed into heat they react and produce light. 5. Which of the flames that you observed gave off the most energy? -Potassium chloride gave off the most energy and one could tell based on its purple flame. 6 . Why do some of the samples give off more than one color flame? When an electron goes through its excited sate it changes color but when it falls back down to its ground state then it goes back to its original color. Conclusion/Discussion: The hypothesis was supported because once I found out the color flame produced by all the solutions; I could match the unknowns with the known substances. We worked to slowly when we did the lab so we had to use second hand data. Also, lighting the Bunsen burner on fire was not the best idea. Why are the flames of no two gases exactly the same color? -Different gasses have a different amount of electrons on different energy levels.