Weaponry: A History :: essays research papers

Weaponry: A History   Ã‚  Ã‚  Ã‚  Ã‚  What is the most destructive power in history? Is it a rocket torpedo that shoots straight to the surface from a submarine, flies through the air toward an enemy sub, and then dives at its target? Is it the electrically powered machine gun that spews out 110 rounds per second to obliterate its opponent completely? Maybe it’s an intercontinental ballistic missile armed with nuclear warheads, capable of killing hundreds of thousands with a single atomic bomb. Then again, is it the tank with thermal-imaging sight that senses an enemy vehicle’s heat so it can see—and kill—even it total darkness?   Ã‚  Ã‚  Ã‚  Ã‚  Actually, it is none of these. One must go all the way back to the beginning of weapons development, when humans first figured out that certain tools made warfare a lot more effective. A person’s arm, for example, could not throw a stone or stick very far, so people devised slings and sharp tips to let their projectiles travel farther, faster and land harder. Iron-tipped spears, javelins and swords came into existence when humans learned to use and shape metals thousands of years ago. Other early warfare devices included bows and arrows, catapults , and with the domestication of the horse, the horse-driven chariot.   Ã‚  Ã‚  Ã‚  Ã‚  None of these primitive weapons seem to answer the above question, so skip ahead to the transport of gunpowder from China to Europe in the thirteenth century. With the introduction of gunpowder, the armor of the famed â€Å"knights in shining armor† gradually became useless against the penetration of ammunition shot from a harquebus, musket, or cannon . By the fourteenth century, most European armies used gunpowder, rockets and other explosives in warfare. Yet the art of war was revolutionized again by the revolver and the automatic firearm in the nineteenth century.   Ã‚  Ã‚  Ã‚  Ã‚  The first major war to use the rapid-fire guns was WWI. New contraptions were needed to protect the soldiers, now huddled in trenches, unable to move, let alone fight. Enter the tank. Infantry could now be on the offensive. Progress in the building of warships led to stronger, more lethal submarines that fired torpedoes from beneath the waves. Torpedo-boat â€Å"destroyers† were then created to combat the submarines.   Ã‚  Ã‚  Ã‚  Ã‚  Germany’s defeat in WWI led to its development of ballistic missiles, one of the inventions that reformed warfare again. Advances in automatic weapons and aviation were the latest innovations on the battlefront. However, it was the deadliest weapon ever created- the atomic bomb- that decided and ended the war once and for all.

Industrial Effluents in the Water Pollution Essay

Water pollution is caused by emission of domestic or urban sewage, agricultural waste, pollutants and industrial effluents into water bodies. Nowadays, its main source is the waste material discharged by industrial units. Waste materials like acids, alkalies, toxic metals, oil, grease, dyes, pesticides and even radioactive materials are poured into the water bodies by many industrial units. Some other important pollutants include polychlorinated biphenyl (PCB) compounds, lubricants and hot water discharged by power plants. The pollutants unloaded into the water bodies usually dissolve or remain suspended in water. Sometimes, they also accumulate on the bottom of the water bodies. Another important pollutant, that can endanger marine life, is the oil spilled by oil tanks. As per the estimates of the United Nations, 1. 3 million barrels of oils are spilled annually into the Persian Gulf, and about 285 million gallons are spilled into the oceans every year. In the United States, the industries contribute to more than half of the total water pollution. The industrial effluents contain pollutants like asbestos, phosphates, mercury, lead, nitrates, sulfur, sulfuric acid, oil and many other poisonous materials. In many countries, industrial water is not treated adequately before discharging it into rivers or lakes. This is particularly true in the case of small-scale industries that do not have sufficient capital to invest in pollution control equipment. In many instances, the researches and studies carried out to determine the toxicity of these pollutants are focused on the individual effect of the toxic elements. Therefore, sometimes these researches lead to an underestimation of the total toxicity of these harmful materials. Besides, their toxicity is assessed with the help of tests carried out on bacteria, which also fails to take into account the accurate toxic effects on other organisms. These harmful pollutants are a major contributor to many grave diseases such as diarrhea, cholera, hepatitis, dysentery and salmonellosis. Besides, many of the pollutants are also carcinogenic i. e. they can cause cancer. Some pollutants like sodium can cause cardiovascular diseases, while mercury and lead cause nervous disorders. DDT is another toxic material which can cause chromosomal changes. Excess fluoride in water may damage the spinal cord, while arsenic can cause significant damage to the liver and the nervous system. In addition to all these, organic compounds present in the polluted water facilitate the growth of algae and other weeds, which in turn use more oxygen dissolved in the water. This reduces the amount of oxygen dissolved in the water and the consequent shortage of oxygen for other aquatic life. In recent times, to control the menace of water pollution, various legislations have been introduced by different countries. The legislations undertaken by the United States include Federal Water Pollution Control Act (1972), the Marine Protection, Research, and Sanctuaries Act (1972) and the Safe Drinking Water Act (1974). Besides, Federal Insecticide, Fungicide, and Rodenticide Act was also amended in 1988. For the success of these legislations, cooperation of the citizens and industrial units is an important prerequisite. In addition to the enforcement and proper use of these rules and regulations, availability of efficient and cheaper pollution control techniques is also required to tackle the threat posed by water pollution.

Socioeconomic Status Of African Americans Socioeconomic...

African Americans Socioeconomic condition Socioeconomic position is a financial and sociological joint whole measure of a person s effort skill and of an individual s or family’s financial and social condition in relation to others, stand on profits, education, and occupation. While breaking down a family’s SES, the family unit salary, workers education, and occupation are inspected, and additionally joined wage, versus with a person, when their own qualities are evaluated. Alternately all the more ordinarily know not a monetary distinction in society all in all. Socioeconomic status is ordinarily broken into three classes to portray the three zones a family or an individual may fall into. While setting a family or individual into one of these classes, any or the majority of the three variables can be surveyed. Furthermore, low salary and education have been appeared to be solid indicators of a scope of physical and emotional wellness issues, including respiratory infections, joint pain, coronary illness, and schizophrenia. These issues might be because of natural conditions in their working environment, or, on account of dysfunctional behaviors, might be the whole reason for that individual s social problem regardless. Education in higher socioeconomic families is ordinarily pushed as a great deal more vital, both inside of the family and additionally the nearby group. In poorer zones, where nourishment and security are need, education can take a secondary lounge.Show MoreRelatedHow Culture Influences Health Of All Individuals1389 Words    |  6 PagesHow Culture Influences Health in America Culture plays a great role in the health of all individuals. The American race has a vast influence over other cultures that migrate to the United States. 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