Nitrogen in Tires

Nitrogen in Tires Question: What makes nitrogen in tires better than air? I see a lot of tires with the green cap indicating they are filled with nitrogen. Is there any advantage to putting nitrogen in my automobile tires instead of compressed air? How does it work? Answer: There are multiple reasons why nitrogen is preferable to air in automobile tires: better pressure retention leading to increased fuel economy and improved tire lifespancooler running temperatures accompanied by less pressure fluctuation with temperature changeless tendency toward wheel rot To understand why, its helpful to review the composition of air. Air is mostly nitrogen (78%), with 21% oxygen, and smaller amounts of carbon dioxide, water vapor, and other gases. The oxygen and water vapor are the molecules that matter. Although you might think oxygen would be a larger molecule than nitrogen because it has a higher mass on the periodic table, elements further along an element period actually have a small atomic radius because of the nature of the electron shell. An oxygen molecule, O2, is smaller than a nitrogen molecule, N2, making it easier for oxygen to migrate through the wall of tires. Tires filled with air deflate more quickly than those filled with pure nitrogen. Is it enough to matter? A 2007 Consumer Reports study compared air-inflated tires and nitrogen-inflated tires to see which lost pressure more quickly and whether the difference was significant. The study compared 31 different automobile models with tires inflated to 30 psi. They followed the tire pressure for a year and found air-filled tires lost an average of 3.5 psi, while nitrogen-filled tires lost an average of 2.2 psi. In other words, air-filled tires leak 1.59 times more quickly than nitrogen-filled tires. The leakage rate varied widely between different brands of tires, so if a manufacturer recommends filling a tire with nitrogen, its best to heed the advice. For example, the BF Goodrich tire in the test lost 7 psi. Tire age also mattered. Presumably, older tires accumulate tiny fractures which make them more leaky with time and wear. Water is another molecule of interest. If you only ever fill up your tires with dry air, the effects of water arent a problem, but not all compressors remove water vapor. Water in tires should not lead to tire rot in modern tires because they are coated with aluminum so they will form aluminum oxide when exposed to water. The oxide layer protects the aluminum from further attack in much the same way chrome protects steel. However, if you are using tires that do not have the coating, water can attack the tire polymer and degrade it. The more common problem (which I have noted in my Corvette, when I have used air rather than nitrogen) is that water vapor leads to pressure fluctuations with temperature. If there is water in your compressed air, it enters the tires. As the tires heat up, the water vaporizes and expands, increasing tire pressure much more significantly than what you see from the expansion of nitrogen and oxygen. As the tire cools, pressure drops appreciably. The changes reduce tire life expectancy and affect fuel economy. Again, the magnitude of the effect likely is influenced by brand of tire, age of tire, and how much water you have in your air. The Bottom Line The important thing is to make sure your tires are kept inflated at the proper pressure. This is much more important than whether the tires are inflated with nitrogen or with air. However, if your tires are expensive or you drive under extreme conditions (i.e., at high speeds or with extreme temperature changes over the course of a trip), its worth it to use nitrogen. If you have low pressure but normally fill with nitrogen, its better to add compressed air than wait until you can get nitrogen, but you may see a difference in the behavior of your tire pressure. If there is water in with the air, any problems will likely be lasting, since theres nowhere for the water to go. Air is fine for most tires and preferable for a vehicle youll take to remote locations, since compressed air is much more readily available than nitrogen.

Advantages And Disadvantages Of A Corporation Diversifying Essay

Advantages And Disadvantages Of A Corporation Diversifying Internationally - Essay Example Diversification may be used to refer to the variation between businesses within a company. This variation may be by products and/ or services. Diversification meaning varies across businesses, as what stands as diversification in one organization may not have significance in another. Thus, the definition of diversification is subjective. Nonetheless, business diversification may be in the dimension of cost leadership, production of commodity products, new product development, market leadership, strong brand names, high value added products, niche markets served, customers shared, advertisement emphasis, customer service emphasis and product design. Other dimensions may be emphasis on research and development, raw materials used, quality emphasis, distribution networks, company size. International diversification entails diversifying an investment portfolio across diverse geographic regions in order to lessen the overall peril and enhance returns on the portfolio. Corporations embrace international diversification by locating their operations in diverse nations and regions so as to reduce operational and business peril. There are three types of international diversification that is, related diversification, unrelated diversification and single product strategy. ... pany level tactic founded on a multibusiness model with the aim of increasing profitability through the use of common organizational capabilities to augment the performance of all the company’s business units. Firms that pursue this mode of diversification strategy are referred to as conglomerates, implying business organizations that function in numerous diverse industries. Advantages of international diversification Diversification and profit stability The assertions associating diversification on profit stability revolve around the portfolio concept, which holds that investing in diversified stock with non related profits may lower the precariousness of a corporation’s total gains. The idea of portfolio relates to product diversification, which may lower the variance of a company’s total profits. The reason is that the unpredictability of various profit schemes merged is nearly always less than the unpredictability of every profit stream independently, on cond ition that the profit streams are negatively related. Researches establish that product diversifiers actually enjoy higher profits than non diversifiers. The degree of risk reduction through unrelated diversification may exceed that which may be attained through related diversification. The reason is that unrelated diversification could lower industry specific systematic risk because it entails diversification across numerous industries. On the other hand, related diversification may not lower industry specific systematic risk happening within an industry. Industry specific systematic risks are the risks universal to all businesses in a certain industry (Kim, Hwang & Burgers, 1989, p 47). Rugman observed the same view, that geographical diversification through direct overseas investments evens out a