Bragg's law

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    X-Ray Diffraction Lab

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    scanned, as well as the peaks the locations of the diffraction peaks on the single crystal. The collected data is then analyzed to determine the criteria for planes to produce a spike in energy by plotting in reciprocal space. This experiment serves to illustrate the importance of reciprocal space. It also introduces the ideas of glancing incidence and exit. Theory The basis of x-ray diffraction is rooted in understanding the relationship between the geometry of diffraction and the geometry of crystal planes. One of the easiest ways to visualize this is the use of reciprocal space. To start, the concepts of diffraction and plane geometry that have been previously discussed in this lab class need to be understood. As previously discussed, Bragg’s Law (Eq. 1) and D-Spacing formula (Eq. 2) are used to calculated how different planes diffract x-rays at different angles. nλ=2d_hkl sin⁡(θ_B ) (Eq.1) Where n is the order of diffraction, λ is the x-ray wavelength, dhkl is the interplanar spacing and θB is the Bragg angle of the material d_hkl=a/√(h^2+k^2+l^2 ) (Eq.2) Where dhkl is the interplanar spacing, a is the lattice parameter and h, k, and l are the plane indices The difference between powder diffraction and a single crystal is also key to this experiment. While a single crystal only contains one plane that translates into one intensity peak in a diffraction scan, a powder sample is polycrystalline and thus contains many different planes results in many…

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    Son Preference Case Study

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    adopted laws and regulations that forbid the practice that give preference to son over daughter (see table 1 below). Table 1: Laws and regulations to prohibit sex-biased discriminations In addressing the issue of son preference, the government laws and regulations to promote gender equality, to tackle the issue of China’s sex ratio imbalance, adopted and carried out series of policies, laws and strategies actions to address the issue of abnormally high SRB in active and comprehensive way, in…

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    Lawyer Jean Giraudoux said that “There is no better way of exercising the imagination than the study of law. No poet ever interpreted nature as freely as a lawyer interprets the truth.”As a child something in me always wanted to debate with a judge or prosecute someone or just be in the courtroom. I guess it is because when I 'm with my dad we always watch crime shows. But the thing that really got me was when I took Civics in Economics my sophomore year we didn 't just talk about politics in…

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    Attorneys are bound by the laws of ethics. Law students spend countless hours studying what they may and may not do when representing their clients. However, real-world application presents far more dilemmas than those discussed in a classroom. Rudy Baylor, the star of the film The Rainmaker, gets a dose of reality as he enters the legal profession right after law school. Rudy is a young, unemployed lawyer desperate for a job. Without any connections to prestigious law firms, he is forced to…

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    Illegal to Save Lives “The boundaries which divides life from death are the best shadowy and vague. Who shall say where the one ends, and where the other begins?” – Edgar Allen Poe. One such person, author Joanna Mackay, wrote “Organ Sales Will Save Lives”, written in 2004, and she argues that black market organ sales should be legal so that more lives will be saved. Mackay begins building up her credibility with facts and reputable sources, citing facts and quotes, and also successfully…

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    through or what problems she has and why she could have a bunch of reasonable reasons on why she should have the abortion and why it should be the woman 's choice. People that think it’s wrong for a mother to have the right to get an abortion need to go through what some of the women have gone through and see if they still think it’s wrong for her to choice because they don’t know the circumstances the woman could be going through. So while people still think abortion should be illegal they…

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    physician-assisted suicide is legal in a total of six states: Oregon, New Mexico, Vermont, Washington, Montana, with the most recent being California, legalizing it on October 5, 2015. These states have passed acts such as the Death With Dignity Act in Oregon, in 1997. "The U.S. Constitution does not guarantee the right to choose to die. However, the U.S. Supreme Court recognizes that Americans have a fundamental right to privacy, or what is sometimes called the "right to be left alone""…

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    ROLE OF THE CRIMINAL JUSTICE PROFESSIONAL Criminal justice professional field is wide with differing responsibilities and roles allocated by position and the level of an officer in the criminal justice department. These criminal justice professionals assume/play a key part in guaranteeing law and order to the citizens. This paper outlines the key individual and societal needs that necessitate the roles and responsibilities of a criminal justice professional and their role in serving these needs.…

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    American history, the government has discriminated against people of color. Up until the Emancipation Proclamation, black people were used as slaves. Since then, African Americans have had to fight for the right to vote and even fight for the right to integrate with the white citizens. “...Blacks were required to pay their fare to the driver, then get off and reboard through the backdoor. Sometimes the bus driver would drive off before the paid-up customers made it to the back entrance.” (Dove).…

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    Marijuana Bright Side OR Positive Side of the Green Marijuana has become a subject of huge controversy it today’s society. The consumption of marijuana has highly increased upon the time. According to statistic, marijuana has become the more used drug in the United States. Therefore, this shows that keeping it illegal does not reduce its use. Likewise, the fact of smoking marijuana does not mean that the person consuming it is a bad person; in fact, he or she may be a role model citizen.…

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