submit a 1250 words paper on the topic Physical Properties of Materials.

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Hi, need to submit a 1250 words paper on the topic Physical Properties of Materials. The appearance of a substance is the first aspect that is observed before embarking on the details of other physical properties. Various substances have characteristic appearances that set them apart from other materials. Water, for example, is usually described as a clear colourless liquid. Though many other substances have this appearance, careful scrutiny of other physical properties helps to ascertain that indeed the liquid is water. Gold has a bright yellow shiny appearance especially when it is a large mass. Silver, on the other hand, has a bright, white metallic appearance. The appealing appearances of gold and silver make them the most popular metals in the manufacture of jewellery.

Ductility is the capacity of a substance to distort under the effect of tensile force. This property enables metals to be stretched and shaped into wires. Malleability, conversely, is the ability of a substance to distort under the influence of compressive forces. This property makes it possible for metals to be moulded and hammered to form sheets. Gold is one of the most malleable and ductile metals ever known. Silver is ductile and malleable as well though not as malleable and as ductile as gold.

An increase in temperature often causes changes in the physical states of materials. For example, solids often change to liquids and liquids change to vapor. Conversely, a decrease in temperature causes materials to revert to their original states. The instants at which these modifications occur are referred to as phase transitions (“Physical Properties of Material”). The change of a solid to a liquid is known as melting. The temperature at which this process happens is the melting point. The conversion of a liquid to vapor usually occurs at a transition temperature referred to as the boiling point.&nbsp.

prepare and submit a paper on high let alpha particles. Human chromosomes can undergo structural changes in exposure to high LET alpha particles.

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Your assignment is to prepare and submit a paper on high let alpha particles. Human chromosomes can undergo structural changes in exposure to high LET alpha particles. The study tries to evaluate the efficacy of three-color FISH and MFish methodology to assess and demarcate these changes. Retired male workers from the Russian Nuclear Industry who were expected to have high exposure to high LET alpha particles during work conditions were involved in the study and standard methodologies were used for the study.

A number of experiments have been reviewed by the author to support the background of the study. Seven studies have been referenced in the paper to support the view that complex aberrations are induced on exposure to high-LET radiation. The definition of insertion which is the characteristic feature of aberrations also has been included in the review. A number of studies involving the FISH technique have profoundly emphasized the importance and relevance of the complexity of radiation-induced chromosome aberrations. The relevance of the fact that the rearranged chromosomes may comprise of parts of multiple chromosomes in the study also has been reviewed. The MFish methodology demonstrated in two different studies one by R. M. Anderson, S. J. Marsden, S. J. Paice, A. E. Bristow, M. A. Kadhim, C. S. Griffin and D. T. Goodhead and another by R. M. Anderson, D. L. Stevens, and D. T. Goodhead have been supportive of this observation. The induction of complex chromosome aberrations in human peripheral blood lymphocytes (PBLs), when exposed to a low dose of high-LET under laboratory conditions, has been supported by different studies and it has been found that the insertions which were visible were parts of other complex aberrations. The references made have supported the background information that the complexity of the aberration induced is much related to the alpha particle exposure.&nbsp. &nbsp. &nbsp.&nbsp.

The study by R. M. Anderson, S. J. Marsden, S. J. Paice, A. E. Bristow, M. A. Kadhim, C. S. Griffin, and D. T. Goodhead have related the in vivo experiment with relevance to the exposure to high-LET particles. It has been opined that long after the exposure, the possibility of efficient detection of stable insertions could be unlikely. The role of Radon, which is a natural emitter of an alpha particle and which is present in the environment has been confirmed by the background information as a consistent source of high LET alpha particle exposure.

Write 5 pages thesis on the topic terrorism emergency plan for metropolis.

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Write 5 pages thesis on the topic terrorism emergency plan for metropolis.

The purpose of the reactionary plan is to enable city authorities to respond as promptly as possible to an act of terrorism(Hendrickson, 2005). The first critical issue under this plan is the city and state response systems(Jiangang, Zhexiong, Bing, & Jianzhong, 2008). Terrorist acts create an environment of pressure under which authorities have to respond to an emergency. Typically, city and state responders are the first to report at the scene of a terrorist act. Usually, these responders will act under a Standardized Emergency Management System (SEMS) prepared by the state. These responders will take charge of the scene until FBI arrive and take over. The second critical area of the reactionary plan is the federal response system(Jiangang, Zhexiong, Bing, & Jianzhong, 2008). By their nature, most acts of terrorism are sophisticated such that left on their own, the city and the state may not manage them. The city and the state request for support from the concerned federal agency. In most terrorist acts, the federal agency involved is the FBI. Upon reporting at the scene of a terrorist act, FBI assumes jurisdiction for the emergency. In certain cases, a joint response may be necessary throughout the management of the emergency. In such a case, there has to be a Unified Command where the city responders will take orders from the state responders. The latter will, in turn, take orders from FBI. The third crucial are of the reactionary plan is the coordination among the various actors in the emergency(Jiangang, Zhexiong, Bing, & Jianzhong, 2008). The world over, many governments have mismanaged terrorist acts on account of poor or lack of coordination among the concerned responders. The United States is no exception.

does a sensitive issue of black peoples discrimination still sour human relations

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I need some assistance with these assignment. does a sensitive issue of black peoples discrimination still sour human relations Thank you in advance for the help!

Does a Sensitive Issue of Black People’s Discrimination Still Sour Human Relations?

Discrimination, racism, and segregation – unfortunately these words still bear its negative connotation in the life of black people, although the time of slavery is over. More or less this aspect touches many representatives of African Americans affecting not only their lives but also forming their specific, probably negative, attitude towards the society of white people, which allows negligence and humiliation of non-white population. Still, some African Americans have not faced with such treatment. One way or another, racial relations is considered to be an important social issue, which finds reflection in various artists and composers.

The excerpt “You are in the dark, in the car…” represents oppressive position of black people being degraded by white ones whenever and wherever they are. Some cases from the expert demonstrate totally negative attitude of white people towards non-white ones, and a kind of black community, “… newly found uncles and brothers” (Rankine), united for protection of oppressors. So, this aspect manifests negative treatment of African Americans in the modern world of democratic rule.

Julie Herbert’s play “Tree” introduces the issue of siblings among people of different race (Jones). In particular, the author lays emphasis not only on the possibility of such a fact, but on the perception of each other by black and white people and the difficulties through which they come forced by men’s prejudices and misunderstanding of key living concepts. Half-brother and half-sister at last find their relatives and are very glad of this regardless their color of skin. Another aspect of black people’s treatment is desire to maintain contacts with them passing over senseless racial separation.

Tori Morrison’s novel “Tar Baby” appears to be a manifestation of contradictory interracial treatment, which depends on particular racial prejudices and personal human perception of representatives of other ethnicities. There readers can see parallel perception of blacks as equal members of society as well as unequal ones. Although, African Americans are presented in the role of servants, which may be fired on suspicion of robbery (probably due to their skin color), they can also have a nice sense of humor or to be specialists in this or that area being able not only to keep the conversation, but also to give appropriate advice on the needed question. So, even if a “… skin blended well with the dark waters” (Morrison) fears people at first, then after talking to its master, they can change their opinion radically.

Current state of black people and their treatment by whites cannot be perceived clearly. There are definitely race prejudices, which sour relations between different ethnicities and cause even opposition and separation between them. Personal attitude towards representative of other race depends on one’s cultural level and educational background.

Works Cited

Jones, Chad. Theater Review: “Tree” Explores Tangled Roots of Family.

SfGate.com, 26 Jan. 2015. Retrieved May 24 from:

http://www.sfgate.com/performance/article/Theater-review-A-Tree-grows-on-Post-St-6039192.php#photo-7430230

Morrison, Tony. Tar Baby. Retrieved May 24 from:

http://www.shmoop.com/tar-baby/summary.html

Rankine, Claudia. You are in the Dark, in the car… Poetry Foundation, Mar. 2014.

Retrieved May 24 from:

http://www.poetryfoundation.