Friday, May 22, 2020

Definition of Angstrom in Physics and Chemistry

An angstrom or à ¥ngstrà ¶m  is a unit of length used to measure very small distances. One angstrom is equal to  10−10  m  (one ten-billionth of a  meter  or 0.1  nanometers). Although the unit is recognized world-wide, it is not an International System  (SI) or metric unit. The symbol for angstrom is Ã…, which is a letter in the Swedish alphabet. 1 Ã… 10-10 meters Uses of the Angstrom The diameter of an atom is on the order of 1 angstrom, so the unit is particularly handy when referring to the atomic and ionic radius or size of molecules and spacing between planes of atoms in crystals. The covalent radius of atoms of chlorine, sulfur, and phosphorus are about one angstrom, while the size of a hydrogen atom is about half of an angstrom. The angstrom is used in solid-state physics, chemistry, and crystallography. The unit is used to cite wavelengths of light, chemical bond length, and the size of microscopic structures using the electron microscope. X-ray wavelengths may be given in angstroms, as these values typically range  from 1 to 10 Ã…. Angstrom History The unit is named for Swedish physicist Anders Jonas  Ãƒâ€¦ngstrà ¶m, who used it to produce a chart of the wavelengths of electromagnetic radiation in sunlight in 1868. His use of units made it possible to report the wavelengths of visible light (4000  to  7000  Ãƒâ€¦) without having to use decimals or fractions. The chart and unit became widely used in solar physics, atomic spectroscopy, and other sciences that deal with extremely small structures. Although the angstrom is  10−10  meters, it was precisely defined by its own standard because it is so small. The error in the meter standard was larger than the angstrom unit! The 1907 definition of the angstrom was the wavelength of the red line of cadmium set to be  6438.46963 international à ¥ngstrà ¶ms. In 1960, the standard for the meter was redefined in terms of spectroscopy, finally basing the two units on the same definition. Multiples of the Angstrom Other units based on the angstrom are the micron (104  Ãƒâ€¦) and the millimicron (10 Ã…). These units are used to measure thin film thicknesses and molecular diameters. Writing the Angstrom Symbol Although the symbol for the angstrom is easy to write on paper, some code is needed to produce it using digital media. In older papers, the abbreviation A.U. was sometimes used. Methods of writing the symbol include: Typing the symbol U212B or U00C5 in UnicodeUsing the symbol #8491 or #197 in HTMLUsing the code Aring; in HTML Sources International Bureau of Weights and Measures. The International System of Units (SI) (8th ed.). 2006, p. 127. ISBN 92-822-2213-6.Wells, John C. Longman Pronunciation Dictionary (3rd ed.). Longman, 2008. ISBN 9781405881180.

Saturday, May 9, 2020

The War Against Terrorism Essay - 781 Words

The War Against Terrorism On August 2nd 1990, Iraq invaded the small oil rich country of Kuwait on its southeastern border. Iraq claimed that Kuwait was a long time province from the 1800’s and early 1900s’, whose lands belonged under control of Iraq, a so-called province. Saddam Hussein also argued that Kuwait was pumping oil from an oil field that was on the border of the two countries and belonged to Iraq. Upon gaining control of Kuwait, Hussein was able to eliminate his previous debt to Kuwait and gain it’s substantial oil wealth, roughly 10% of the worlds oil supply. Regardless of the motives behind Iraq’s invasion, under international law, none of Iraq’s claims against Kuwait justified its invasion of that country. The†¦show more content†¦In the aftermath of the attacks on the World Trade Center on September 11th, the world has had a sobering look at world terrorism. Led mainly by the United States, and supported by the United Nations, a new war on terrorism has begun. Overwhelming support worldwide has surfaced as President Bush has vowed to punish those who decide to commit terrorist acts, as well as those who harbor or condone these activities. So far Bush has followed through on his promise with the war in Afghanistan against the Taliban regime. Others are also displaying their understanding of the situation and are treading a great deal lighter in search of their causes to avoid being labeled as terrorists, as shown by the latest disarmament and return to the negotiating table by the Irish Republican Army. As the world watches, President Bush is now faced with enormous pressure to gain control of the Arab-Israeli conflict. However, this situation is a difficult one. With Israeli’s continual attempt to occupy more land in the disputed settlements, Palestinian anger only grows. With Yasir Arafat’s inability to control, or unwillingness to control, such militant groups as Hamas and Islamic Jihad, chances of the two sides reaching a piece agreement dwindle.Show MoreRelatedEssay on The war against terrorism976 Words   |  4 PagesIs war the right way? Why do people resort to such violent acts as bombing, assassinations, and hi-jacking? How do individuals and organizations justify these acts of terror? These acts can be described as terrorist actions. Terrorism is a growing international problem. During the last twenty years, new terrorist groups have sprung up all over the world. Governments have had little success in their attempts to resolve issues in which terrorism is used. A major problem in discussing terrorism is establishingRead MoreThe Threat Of The War Against Terrorism1002 Words   |  5 Pagesworld evolves new threats appear and some stand by what they believe in. These beliefs cause harm to other people. An example this would be, big military forces trying to prove a point by killing innocent civilian lives. This is where the Counter Terrorism forces comes into play. Such as the United States Seal team six, United kingdom S.A.S and Kopassus - Gultor 81. They seek out those who do wrong and bring them to justice. The only problem is that they need to have a stronger force to be able toRead MoreThe Battle Against The War On Terrorism1753 Words   |  8 PagesWhat Now? An analysis of the responses to the Senate Report on CIA Interrogation The fight against the â€Å"war on terrorism† has initiated a debate in the United States over the use of torture and advanced interrogation techniques to extract information needed to protect the safety of its citizens. In lieu of the Sept. 11, 2001 attacks, government officials believed that using extensive force against suspected is justified, especially if such force results in the prevention of future planned attacksRead MoreUs War Against Terrorism Essay724 Words   |  3 Pagesconsistent in its process of combating against terrorism and other ills in the region with other regional organizations as he says â€Å"U.S. policy in Central Asia is embattled and under siege. Moscow and Beijing, as well as to a lesser degree Tehran, view America’s political and strategic presence in Central Asia with unfeigned alarm. Indeed, Russia and China suspect America’s desire for bases there. Despite Russo-Chinese protestations of support for the U.S. war on terrorism, in fact they wish to exclude AmericaRead MoreGeorge Bush and His War Against Terrorism Essay928 Words   |  4 PagesGeorge Bush and His War Against Terrorism When George W Bush came to the presidential office of America at the beginning of the year 2000, there was already a lot of controversy that surrounded him. He was appointed Governor of Texas in 1995 and as of 7:30pm, December 7, 2000, 152 people have been executed during Bushs office as governor. This makes Texas Governor George W Bush the most-killing Governor, in the history of the United States of America. This list canRead MoreThe Consequences of Terrorism Essay1580 Words   |  7 Pages Day in and day out facing the music of the war against terrorism, the term, again, imposed on the people of Pakistan who live the term as their reality, disinterested in the background an origin of the term. The western contrived term was first used by used by the American President, George W. Bush, during tenure trigger of the war against terrorism happened. At Camp David George W. Bush in his speech said This crusade – this war on terrorism – is going to take a while, ... and that wasRead MoreAnalysis Of George Orwell s Nineteen Eighty Four Essay1739 Words   |  7 Pagesthis, the theme of terrorism and war is questioned by Lee Rogers in this report â€Å"The U.S. Government is Preparing for War Against the American People† where he states that the government of the U.S. is planning on going against its own citizens and their choices. All three of these dystopias, state an example of complete government control and terrorism. Terrorism is used to deceive citizens of these societies and strengthen government control over society. The concept of terrorism is used to not considerRead MoreEssay on Human Rights, War and Terrorism1226 Words   |  5 PagesHuman Rights, War and Terrorism After every war come the peace talks; after millions of people had been killed. After the terrorist attacks comes the investigation, reason, or counter-terrorism; after lives had been wasted. There is time for the nations of the world to come together to understand one another in order to avoid war and terrorism and that time is now. War is as old as man. It is a reign of terror when people are always on the run, always hungry, alwaysRead MoreInternational Terrorism - the Worlds Greatest Challenge Today?680 Words   |  3 PagesInternational Terrorism – The World’s Greatest Challenge Today Today the threat of terrorism is becoming more and more serious. Terrorism is considered the greatest threat against the safety of the world, and especially the USA, today. The extent of the terrorism has increased significantly over the last couple of years, since the terrorist attacks against the US on the 11th of September 2001. After these attacks former president of the US, George Bush declared a war against terrorism. There areRead More Why Terrorism Should Be a Global Concern Essay1380 Words   |  6 PagesThe war on terror is at the peak and there are vivid indications that every stone will be turned to halt it. A central assumption is that terrorism is a religious war, apparently between Christians and the Muslims. This is just a moral claim that terrorists are using to attract more people over to their side, as well as create solidarity among the Muslims. As a result, the imagery and the reality of terrorism differ overwhelmingly. There are various terror occurrences around the globe that are similar

Wednesday, May 6, 2020

Changes in Education Sector in Rural Bangladesh Free Essays

Education Sector Education sector has faced significant changes over decades in rural Bangladesh. Earlier the maximum level of education that people received was mainly upto primary education. The drop-out rate was very high. We will write a custom essay sample on Changes in Education Sector in Rural Bangladesh or any similar topic only for you Order Now The number of female students was very low and they used get married while studying in primary level. As a result, the number of female students in the secondary level was almost zero. The main reason behind this low enrollment in secondary level was ignorance of the parents. They had this mind setup that primary education was good enough for their children and encouraged them to get involved in income earning activity for which they got no time to study. But, people are learning about the importance of education gradually, although the number of drop-outs is still not very low in poor families and among girls. Another trend in the village was late admission. By the time they completed primary education they had become 17/18 years old. Nowadays, in the village a student completes his/her higher secondary education at this age. The medium of education has also changed. Earlier parents were inclined to ‘madrasa’ education. They wanted to make their children ‘moulana’. But today the parents see their children becoming doctors or engineers in the future. Earlier the villagers used to send their children to colleges near the village or at best near the district. But in recent years, parents are showing interest in sending their children to the capital for studying in college. Many of them are getting admitted in BUET, Dhaka University, and other prestigious universities of the country. One of the main reasons of this radical change in education level of the village is the establishment of school, colleges in the recent years. Earlier, there was only one or two primary and high schools in the village. But many schools, colleges are being established nowadays with the initiative of the government and NGOs. The government is offering different scholarship programs for encouraging the rural people to send their children to schools, colleges and receive education. Awareness programs are being held by NGOs and the government for making people conscious about the importance of education. Another important change in the education system in rural Bangladesh is increased enrollments in diploma level of education. This trend has started very recently. Some of the students has already passed diploma others and are on the way of passing. How to cite Changes in Education Sector in Rural Bangladesh, Papers

Tuesday, April 28, 2020

Mandership Review Essay Example

Mandership Review Paper Essay on Mandership The taste and color markers are different, not only so that you can somehow relate to the personality of Lebedev, the activities of his design studio or Yandex, but Mandership should read. It is certainly better textbook, much less that it is impossible for him to learn how to design in general or in the studio Lebedev, in particular, its scope is much wider than the claimed design, typography and semiotics Mandership is applied to the head and cures severe Russian conditions: simple stupidity and abykakosti. Do not think that if the text is written as if for designers, others can relax. On the contrary, to solve any task falls to everyone, then everyone should read; some of the other get paid for it (managers, for example), then they should first read Mandership. It is universal (and where not universal, there is simply poznovatelno) The first thing to learn:. Design it does not make a beautiful design it is convenient to make a rationally correct. Similarly, the management is not confined to the squeezing of profit (more so apply yourself to your favorite areas of activity). A distorted understanding of the essence entails miserable results: the sites where it is impossible to find the necessary information to the useless graphics ryushechek devices, a revolutionary navigation that puts the user in a dead end, etc. The second the scale of assessments.. If the money come from for the product, then it can only be estimated on-Lebedev: fucking or full of shit. A big mistake a bad employee believe that somehow made and shit these are different levels of quality. In fact, they are one and the same. Third, under the heading abundantly clear critical mass of notes, and the meaning of which must be obvious to everyone, but the eternal bluntness and abykakoe. We will write a custom essay sample on Mandership Review specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Mandership Review specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Mandership Review specifically for you FOR ONLY $16.38 $13.9/page Hire Writer Finally, in fact, the semantic thing: design, typography, semiotics interesting and informative .

Friday, March 20, 2020

The Philosophy of Rehabilitation Essays

The Philosophy of Rehabilitation Essays The Philosophy of Rehabilitation Essay The Philosophy of Rehabilitation Essay The philosophy of rehabilitation refers to the use of prisons as correctional facilities. Up until the end of the nineteenth century, the judicial system used prisons to hold prisoners awaiting trial or as places where persons were punished. Other remedies for offenders included corporal punishment, exile, and even execution. The remedies did not, however, limit the rate of crime. In response to the poor efficiency and use of prisons, the early twentieth century developed correctional institutions, where prisoners were meant to be rehabilitated. The correctional institutes employed different tools to try and improve the lives of the inmates when they were re-inducted into the society. The civil rights movement and the Vietnam War were among some of the most socially disruptive events of the mid-1960s all through to the 1970s. In addition to this, the judicial system saw some of the most incompetent years in the history of the USA. The judges were lenient to dangerous criminals, offering paroles in the name of the constitution. The conservatives saw the misuse of the judicial system and the correctional institutes around the country by the prison administration. The liberals, on the other hand, were more concerned with the injustices that the philosophy of rehabilitation has endorsed. The integrity of the judicial systems had been defeated in a significant manner. Both conservatives and liberals, therefore, moved to attack rehabilitation as a recourse to the crime problem. In 1974, Dr. Martinson published an article indicating the futile nature of the government and society of the USA in rehabilitating prisoners. It is in this article that he coined the term, Nothing works. The article analyzed the different solutions that the government had tried to come up with to improve the crime situation. The nothing works doctrine was one of the most famous politically motivated phrases of the 1970s.

Tuesday, March 3, 2020

How to Make Napalm B - Chemical Synthesis of Gelled Sol

How to Make Napalm B - Chemical Synthesis of Gelled Sol Napalm is the name given to any jellied form of gasoline or other flammable petroleum. It is used for circumstances where the liquid is too hard to apply or else wont stay where it is placed.  Napalm B, more usually just called napalm, is an example of a gelled sol. This easy napalm synthesis is an interesting introduction to sols and gels. Materials 35 g polystyrene (e.g., Styrofoam or other polystyrene foam, used for insulated cups and packing peanuts)100 ml gasolinematches or a lighter Procedure Break the polystyrene into small chunks. Sometimes you can find polystyrene foam beads, which will work fine without any additional processing.Pour 100 ml of gasoline into a glass container, such as a 250 ml beaker. Any similar-size glass container is fine.Stir in the polystyrene, a little at a time. The polystyrene foam will fizz and seem to dissolve, although this really is the formation of the gelled sol.When all of the polystyrene has been added, there should be no remaining liquid gasoline. The glass container will contain a semi-rigid sol. Observations and Experimentation with Napalm and the Gelled Sol In an outdoor location, away from heat or flame, invert the container of gelled sol. Notice that it will resist flowing out of the container. Although the sol is a liquid, it behaves like a solid in that it maintains its form.If the sol does not fall out of the glass container, gently tap it to dislodge it. Note the characteristics of Napalm B that make it a gelled sol.On a fire-safe surface, ignite the napalm. If you like, compare the combustion of napalm with the combustion of 100 ml of gasoline. Safety This project is best performed outdoors since gasoline vapors are volatile and toxic. Wear protective goggles and gloves to protect yourself from the splashing of the liquid. Use care when igniting the napalm. Its advisable to have a fire extinguisher handy. This project is intended for mature chemistry students. Keep all materials away from children and pets. Reference: Robert Bruce Thompson, Illustrated Guide to Home Chemistry Experiments All Lab, No Lecture (2008) OReilly, pp. 326-329.

Sunday, February 16, 2020

Interpersonal communication Essay Example | Topics and Well Written Essays - 1500 words - 2

Interpersonal communication - Essay Example However, the scenario has changed rapidly during the last four decades and communication has emerged as one of the key factors whether in a group of people or between two individuals. Since interpersonal communication is an unending process (West and Turner 10), the changes that are noticed in this type of communication are obvious. In short, it is extremely difficult to define what interpersonal communication is, simply because it cannot be bound within a restricted area. Thus, the changes that it has picked in various stages of evolution have become an intrinsic part of the same. Communication is a broad term in itself that incorporates several nuances. As a matter of fact, the factors that affect interpersonal communication require more focus in order to understand and draw conjectures. For instance, Judee Burgoon’s Expectancy Violation Theory is a significant milestone that illustrates non verbal communication in various ways. This theory that demonstrates how non verbal communication comes under the influence of expectations is worth appreciating. The significance of this theory lies to the extent and capacity in which it depicts non verbal communicat ion such as body language and eye contact. Interpersonal communication is intertwined with our daily lives and there is hardly a moment that does not reflect various aspects of this communication, which is substantiated by Turner and West: â€Å"Each day we perform one of the most ancient of all behaviors: interpersonal communication. We head off to work and greet people on the bus, in the office, in the carpool or on the street. We talk to our roommates and discuss last night’s party over breakfast. Or we wake up and soon find ourselves in the middle of a heated exchange with a family member about dirty dishes. Although each of these situations differs, they all underscore the pervasiveness of interpersonal communication in our lives†