Tantalum Facts - Periodic Table of the Elements

Tantalum Facts - Periodic Table of the Elements Tantalum  Basic Facts Atomic Number: 73 Symbol: Ta Atomic Weight: 180.9479 Discovery: Anders Ekeberg 1802 (Sweden), showed that niobic acid and tantalic acid were two different substances. Electron Configuration: [Xe] 6s2 4f14 5d3 Word Origin: Greek Tantalos, mythological character, king who was father of Niobe Isotopes: There are 25 known isotopes of tantalum. Natural tantalum consists of 2 isotopes. Properties: Tantalum is a heavy, hard gray metal. Pure tantalum is ductile and may be drawn into very fine wire. Tantalum is practically immune to chemical attack at temperatures lower than 150  °C. It is only attacked by hydrofluoric acid, acidic solutions of the fluoride ion, and free sulfur trioxide. Alkalis attack tantalum very slowly. At higher temperatures, tantalum is more reactive. The melting point of tantalum is very high, exceeded only by that of tungsten and rhenium. The melting point of tantalum is 2996  °C; boiling point is 5425 /- 100  °C; specific gravity is 16.654; valence is usually 5, but may be 2, 3, or 4. Uses: Tantalum wire is used as a filament for evaporating other metals. Tantalum is incorporated into a variety of alloys, conferring high melting point, ductility, strength, and corrosion resistance. Tantalum carbide is one of the hardest materials ever made. At high temperatures, tantalum has good gettering ability. Tantalum oxide films are stable, with desirable dielectric and rectifying properties. The metal is used in chemical process equipment, vacuum furnaces, capacitors, nuclear reactors, and aircraft parts. Tantalum oxide may be used to make a glass with a high index of refraction, with applications including use for camera lenses. Tantalum is immune to body liquids and is a non-irritating metal. Therefore, it has widespread surgical applications. Sources: Tantalum is found primarily in the mineral columbite-tantalite (Fe, Mn)(Nb, Ta)2O6. Tantalum ores are found in Australia, Zaire, Brazil, Mozambique, Thailand, Portugal, Nigeria, and Canada. A complicated process is required to remove tantalum from the ore. Element Classification: Transition Metal Tantalum Physical Data Density (g/cc): 16.654 Melting Point (K): 3269 Boiling Point (K): 5698 Appearance: heavy, hard gray metal Atomic Radius (pm): 149 Atomic Volume (cc/mol): 10.9 Covalent Radius (pm): 134 Ionic Radius: 68 (5e) Specific Heat (20 °C J/g mol): 0.140 Fusion Heat (kJ/mol): 24.7 Evaporation Heat (kJ/mol): 758 Debye Temperature (K): 225.00 Pauling Negativity Number: 1.5 First Ionizing Energy (kJ/mol): 760.1 Oxidation States: 5 Lattice Structure: Body-Centered Cubic Lattice Constant (Ã…): 3.310 References: Los Alamos National Laboratory (2001), Crescent Chemical Company (2001), Langes Handbook of Chemistry (1952), CRC Handbook of Chemistry Physics (18th Ed.) Return to the Periodic Table

Annexation of the Philippines

Annexation of the Philippines It is a controversial question, but I believe that it was a necessary and wise decision because it freed the Filipinos from the devastating Spanish force. It also benefited to the United States because they opened trade ports for various goods and services and broadened business interests. It also served as a fueling and repair station for U. S. naval vessels and ships. It also contributed to their imperialism, because if they annexed hadnt the Philippines, the countries of Japan, France would have possible seized the islands. Expansionism helps the United States grow as a country, and expansion into the Philippines would grant more power to the United States as a world leader. It was argued that after rescue from Spanish rule, USA could not simply leave the Philippines out in the cold to ultimately fail without assistance from a superior civilization. Another reason the United States should annex the Philippines is that with the Philippines the U. S. would have great natural benefits. Not only will there be many natural resources, but also the Philippines geographic location will benefit the U. S. in future warfare and trading. The Philippines would provide new markets and cheap labor, which would help the U. S. s overall economy. But annexing wont just help the U. S. The people of the Philippines would also benefit. The U. S. would establish a democratic society. People would work for wages and the economy would rise. U. S. inventions would be introduced to improve living conditions, such as, plumbing, electricity, and better structured homes. Some of the people of the Philippines may think that this process would be taking advantage of them, but they dont realize that both countries would benefit with the annexation of the Philippines.

Open Markets, Closed Borders Assignment Example | Topics and Well Written Essays - 250 words

Open Markets, Closed Borders - Assignment Example I am of the opinion that if full disclosure of information by the commission is done, the public would appreciate the facts and figures as they happened and help them deal with closure. It is important to note and mention that the questions that the victims and families have regarding the sad events of 9/11 would be put to rest. This is to say that the victims, families and the society as a whole would have closure on the issue, appreciating successes and failures accordingly. There exists as cooperative relationship between the DoD and homeland security where they engage in matters of complementarities (Wise, 2006). If there is a breach or any issue by the coastal line security and safety, then the homeland security would initiate the response at the signal of the DoD personnel. In practice, it is the role and duty of the DOD to safeguard the territorial integrity and waters of the USA, if a person is arrested trying to enter the country illegally, then the DOD personnel would handover such a person to Department of Homeland security for processing and charging such a person under relevant

Zend is IGN Entertainments Next Generation Platform Essay

Zend is IGN Entertainments Next Generation Platform - Essay Example From this discussion it is clear that it operated with Right Media’s optimization technology predicting where the ads will work best. The Exchange afforded buyers and sellers the opportunity to trade digital media on a common platform in a transparent setting. Because so many buyers and sellers come to view the digital products and transact openly, sellers are able to obtain the best price and buyers are able to gain the best value for their money on each transaction, because of the open auction process. Two years after its initial opening, the Exchange has grown tremendously to the point that it serviced a network of 19,000 advertisers and publishers transacting some 4 to 5 billion ads per day, and processing as much as 100,000 requests per second. This study highlights that the company needed to upgrade its service with a convenient and secure application that will interact with the exchange in post the ads, create the inventory, post bid and ask prices and contract the sale via auction, monitor and document the results, and otherwise assist in all the workings of the exchange. The initial foray of Right Media was to provide a Windows-based desktop application which, however, was unsuccessful in carrying out the desired tasks due to difficulty of maintenance, support issues, and frequent updating which customers resented. The firm therefore set out to find a rich web application that customers may use regardless of which platform they were standardized on, and which allowed for frequent updating without too much disruption. PHP 5 was not new to Right Media; in fact, it had initially employed it in its operations as early as 2004 during the creation of the web application as it had already been the standard in the industry. There were several reasons for this choice.  

Analysis of the 6th Chapter of The Aesthetics of the Natural Essay

Analysis of the 6th Chapter of The Aesthetics of the Natural Environments - Essay Example Appreciating landscapes may involve purely sensory layers such as sight, sound and smell. Rely do this layers exist alone. Whenever we look at a landscape we seek out formal relationships which include conceptualizing and recognizing and adding context and background including many more. Metaphysical imagination is a concept used to explain the aspects of nature for which there are no clear concepts and exact words to use. This in essence means that landscapes reveal and conceal much more beauty than what we see, meaning it has much more to offer. The aesthetic experience of nature includes a diverse range of components from the basic ones like rocks and stones, to the bigger components which ultimately is the world as whole. This chapter aims at clarifying five principal components that deal with landscape and metaphysics namely; 1) Brings out the concept of metaphysical imagination and its relation to aesthetic experience of nature Metaphysical imagination essentially relates to ho w we interpret a scene in nature in relation to the whole world experience .It fuses present experience from landscapes and sensory components, but not mediation that a landscape arouses. Nature presents itself more for sustainability than for enjoyment. Hepburn argues that we should experience nature as it is rather than how we want to perceive it. According to him we respond to features to which nature presents. The author differentiates between human attitudes and appreciation towards art and towards appreciation of the aesthetic value of nature. Artists have a tendency of including technological advancements to their work, even the ones that deal with nature and we appreciate it. However when we interfere with nature using technology we tend to appreciate it less, compared to if less invasion of technology. He therefore argues that the way we appreciate nature is the way we should appreciate the beauty of art. 2) The author argues that philosophers sometimes undervalue metaphysi cal imagination. This he argues happens because of several reasons, one of them being the fact that they want to maintain how they engage aesthetically with nature free from expenses which lack rational support for example religious experiences, which cannot be determined and whose description fails on distinct reference. Philosophers who undervalue metaphysical imagination do not want metaphysics to be used in experiencing metaphysics. The other reason why metaphysical imagination can be undervalued is because the experiences derived from landscapes can only be eluded by the person who experienced them. He encourages recognition of the endless variety of aesthetic experiences for example if pantheists or atheist view is replaced by metaphysics view, then metaphysical ideologies such as materialism will increase. On the other hand scientific evidence should not surplus all other aesthetic appreciation of nature. Science cannot oust metaphysics. This is despite the fact that metaphys ics mainly works on speculative and incomplete evidence. Science on the other hand works with evidence; hence it ends up looking at the world selectively and therefore ends up eliminating human concerns, which form part of nature. Human perspective in appreciating of aesthetic component of nature cannot be downplayed. Science or any other method alone cannot be used to value metaphysical imagination. 3) On the other hand we tend to over value or exaggerate metaphysical

PHL Response Paper #2 Essay Example | Topics and Well Written Essays - 750 words

PHL Response Paper #2 - Essay Example Perhaps the three factors that must be understood by businesses when it comes to proper corporate governance are the importance of authenticity or sincerity, the need for transparency or accountability and the essential quality of the golden rule. A corporation must develop a sense of authenticity if it expects a consumer base to believe its claims. However, authenticity, by its very nature, is not something that can actually be bought or conducted on a superficial level. As Matt Endriss, the CEO of Birkenstock says, â€Å"When you are honest only because honesty pays †¦ you risk forgetting the meaning of honesty. When you are socially responsible only because social responsibility pays, you lose any real sense of what responsibility means† (212). By bringing in the question of good behavior for monetary reward, corporations and their leaders reinforce the selfish and self-centered, what’s-in-it-for-me attitude that typically leads to corruption and abuse of the system found in the business world today. This principle can be seen in almost every office complex when employees and employers are constantly engaged in a tug of war of favors, extra effort for extra pay and so forth. At the same time, the consume r is able to see through the false ‘humanitarian aid’ provided by a company used primarily as a means of boosting profit. Yet they recognize the true humanitarian aid provided by a company that acts simply in genuine interest in improving conditions for others. This is the focus of John Maxwell’s work regarding ‘true trust’. As Maxwell points out, â€Å"proper governance built on the element of trust should develop connections with others based on action† (lecture, page 6) and this action should be sincere action if it is to have any meaning. Companies that work to develop transparency are more trustworthy than those who struggle to keep their activities hidden. This both assures the consumer as well as ensures

Law and Economics Essay Example | Topics and Well Written Essays - 1500 words

Law and Economics - Essay Example The back and forth between RIAA and the MPAA (Recording Industry Association of America and the Motion Picture Association of America) and copyright infringement has been a staple of the news since Napster was originally shut down back in the last 1990’s. Originally, groups such as the RIAA and MPAA have targeted the copyright infringer themselves; however, the specter of taking a 12 year old girl to court and forcing a settlement on her that equates to tens of thousands of dollars in judgment per song downloaded was counterproductive to their cause. The copyright battle has digressed into a type of action/reaction battle that pits private entities against oftentimes ill-informed web-users caught between an oftentimes impartial judiciary branch. As such, the MPAA and RIAA changed their tactics and began to target the method through which the files were being shared; namely, the torrent trackers that hosted the content. This method failed to achieve the desired result as torren t trackers merely moved their servers to nations that were outside the jurisdiction of the MPAA and RIAA. As a last resort, the MPAA and RIAA have began bringing suits towards the ISPs(Internet Service Providers) that provide the link to the information that copyright infringers download. This practice has achieved mixed results. As is the specific case in Australia, the High Court dismissed the case brought by MPAA and RIAA representatives that would have required ISPs to suspend the accounts of known copyright infringers. Although the MPAA and RIAA have a point with regards to the level of copyright infringement that their interests see violated on a daily basis, the fact of the matter is that these organizations are pursuing a somewhat minor problem with an heavy handed and categorical approach that has severe effects on the way that everyone uses media and data. As a community, file sharers (copyright infringers) vehemently defend their right to own, acquire, distribute, and dis seminate any and all forms of media and information. To this group it is seen a right of free and open societies to remove all constraints to the free flow of information. However, on the flip side, copyright holders and those that have labored to create intellectual property are interested in protecting it from threats to its overall profitability. As such, a prime threat to profitability of intellectual copyrighted information is illegal file sharing. These two groups are increasing intractable in their support and defense of their respective practices. As such, to better understand the true implications of their respective actions, an empirical analysis must be performed to ascertain the negative attributes that file sharing may or may not have with relation to intellectual material. Although it would appear to seem a very straightforward answer as to whether illegal file sharing has directly affected music and film profits, the answer is anything but (Goel et al, 2010). A study by the University of North Carolina found that an album that was leaked up to a full month ahead of its scheduled release (and vigorously downloaded during this time) would actually experience a slight boost in overall sales (Dewenter et al, 2012). This non-expected result is just the tip of the