An Evolution Of The Atomic Theory

An Evolution Of The Atomic Theory The atomic theory has advanced since the discovery of radioactivity in 1898. And so much of modern technology is based on these advancements. They couldn’t have happened without the discovery of electrons (e-), protons (p+), and neutrons (n0) through experiments done by four key scientists. Atomic theory starts to develop in 1897 when J. J. Thomson discovered the e- through his cathode ray experiment. In this experiment (figure one) he had a partially evacuated tube (a) with a cathode (b) and an anode (c) attached at each end. The cathode and anode were hooked up to a power source with the cathode being negative and the anode being positive. An electrical shock was sent through the cathode and it emitted negative cathode rays that traveled in a straight line (d). But when a positive magnet (e) was placed next to the rays, the rays deflected toward the positive magnet (f), proving they are negative because opposites attract. Another important discovery in atomic theory is protons. In 1910 at the University of Chicago a scientist named Rutherford was puzzled over the structure of the nuclear atom. J.J. Thomson had suggested a â€Å"plum pudding model† (Figure 2) of the nuclear atom where the atom is a ball of positive charge with e- stuck in it, but Rutherford wanted to put this theory to the test, so he conducted the gold foil experiment (Figure 3). There was a round florescent screen set up with a radioactive source at the entrance. From the radioactive source Rutherford fired ÃŽ ±- partials at thin gold foil. He expected them to all go through with minor deflections but this wasn’t the case. (Figure 4) He observed some particles moving off course from the straight line he assumed them travel, and some particles being bounced back altogether. From this observation came the conclusion that when a particle comes extremely close to where all the positive charge is located, it will move off co urse and when it hits this core it will deflect back. Rutherford called the core he found the nucleus which also makes up most of the mass of an atom and consists of protons. He found (figure 5) that the nucleus is surrounded by positive charge and has e- particles stuck in it. In 1911 Millikan was back on the job of electrons. Thomson had proven what the mass/charge of a e- was, he wanted to determine what the actual charge on each particle was. To do this he created the oil droplet experiment (Figure 6). Oil drops were sprayed into a chamber will a very tiny hole at the bottom. When an oil drop passed through the hole it was observed through a microscope and zapped with an x-ray that removed all air particles from it. The positive charge given through the plate above the particles was manipulated and monitored so the scientist could see how much positive charge it took to balance the negative charge underneath and the positive charge above and make the oil suspend in mid-air. From this they could determine the negative charge on an electron. Another thing that stumped Rutherford was why the atomic mass was larger than the combined mass of protons and electrons in a substance. He proposed that it was because of a neutral particle, but never did any experiments to prove this. In 1932 Chadwick took on the challenge and designed an experiment (Figure 7) where he fired ÃŽ ±- partials at a beryllium target. This then emitted particles that were allowed to fall onto paraffin wax, then releasing more particles, protons. From energy calculations he saw that the particles released from beryllium, as a result of the arrival of ÃŽ ±- partials on it, are uncharged and have essentially the same mass as protons, he called them neutrons. Without these important advances in atomic theory, it would be still assumed that the atom is the smallest particle of matter. Technology would be stuck in 1803 with John Dalton’s theory, and until a scientist came along with an experiment as brilliant as these, there would not be modern technology or a understanding of science as current as the one today.

Civil Disobedience. George Orwells 1984 Essay Example | Topics and Well Written Essays - 750 words

Civil Disobedience. George Orwells 1984 - Essay Example The capacity to think is what differentiates us from all other creatures that roam this earth. Our knowledge of the human beings is also what tells us that there are things beyond our grasp that make up for who we are and how we act in relation to our surroundings. Yes, I believe in the human spirit. I believe that there is a force much more than our tangible being that presupposes our need for the attainment of a life without constrictions or what most appropriately is, upright. This is a need that is the most fundamental aspect of our evolution simply because it is human nature. George Orwell’s 1984 is a terrifyingly realistic portrayal of a country manipulated by one party in such a way that they have reined supremacy over the people in a manner so cunning and much more egocentric than that of a monarchy.Winston Smith, the low-ranking official in the dominating party, is a representation of the human spirit. Overcome by the power and influence of Big Brother and the domination of ‘The Party’ he is the tamed voice of the internal screams of the people upon the knowledge of what is actually going on in Oceania. His outlook is one of optimism in the bleakest time. It is a yearning for an inkling of redemption even though it is almost something unthinkable given the circumstances of the time and the rampant greed and selfishness. The final conversation between O’Brien and Winston is a sad epiphany of a wishful thinking yet an admiring commentary on the perseverance of the human spirit despite overwhelming difficulties. O’Brien sarcastically comments on his unlikely optimism as being the last man of its kind. â€Å"Your kind is extinct;we are the inheritors. Do you understand that you are alone? You are outside history, you are non-existent†¦And you consider yourself morally superior to us, with our lies and our cruelty?† and to which Winston confidently replies, â€Å"Yes, I consider myself superior† (Orwell, p. 156). This conversation also discusses the principal notion of self over belief in any God. This is also what Emerson reiterates in his essay of self-reliance. â€Å"To believe your own thought, to believe that what is true for you in your private heart is true for all men, — that is genius† (p. 13). What compels us to do everything that we do is first based on how we feel and how we react to the outside stimulus. With or without religion there must be that something that guides us in what we do and that our relationship with other people persuasive unto what we a re capable of doing and what we refrain from. As Marx famously said, religion is the opium of the people. If a person follows everything religion prescribes without having to think for himself then he is nothing less than the people of Oceania who dismiss all the capricious and whimsical acts of their own government who were supposed to be their representative and protect them from all possible harms. â€Å"Men are infinitely malleable. Or perhaps you have returned to your old idea that the proletarians or the slaves will arise and overthrow us. Put it out of your mind. They are helpless, like the animals. Humanity is the Party. The others are outside — irrelevant† (Orwell, p. 156). This ideology is the basic premise that allowed ‘The Party’ to maintain their control over the people. This is the very idea that Winston stands against. It is a social commentary on how there are powerful people that makes manipulation possible. It is a government grounded on fear, cruelty and hatred. There is absolute lack of equality among the people. The very essence of Communism premise that the proletariats have to overcome and defeat in opposition to the bourgeoisie. â€Å"

CCHBC Supply and Demand Management Assignment Example | Topics and Well Written Essays - 3500 words

CCHBC Supply and Demand Management - Assignment Example The paper tells that the ability to meet the demands of both the external and internal environment within a multinational corporation requires planning and implementation through various means. The structure which is followed through Coca Cola’s HBC is one which provides alternative methods to ensure that various needs are met for the product. This is based on the operations strategic management and the ability to control the supply and demand with planning and control. The way in which CCHBC is able to work with suppliers and monitor principles within the corporation furthers the advantages of the corporation and the strategies which are developed. Examining the relevant approaches which are associated with CCHBC and how these are assisting with the development of the corporation then is able to provide an alternative approach to the development of corporations at a global level and with a strategic infrastructure. The first concept which is approached within CCHBC is the ope rations strategic management and the ability to achieve strategic aims. The approach which CCHBC is using is based on the four main principles of meeting the supplies and demands, including availability, affordability, acceptability and activation. These are operation management practices which are practically applied at various levels to ensure that the quality is maintained within each procedure. The availability is one which centers on the supply chain management and accuracy of each of the orders. This is followed by the affordability, specifically which associates with the quality control and planning while assisting with competitive prices dependent on the location of suppliers and region of the country. The acceptability furthers with quality control and planning and is based on matching with specific standards for the CCHBC to continue with high – quality products. The activation which is associated with this includes having the right price, location and brand while d eveloping the management processes and cohesion. This occurs through multi – departmental agreements. The approach which is used for quality control and planning as well as supply chain management is one which builds strength and reliability