soak in distilled water (the minerals in tap water can further taint the coin’s surface if soaking for a long time) or olive oil — olive oil is a very gentle way to clean coins‚ but you may need to soak them for several weeks. Silver‚ copper‚ and nickel-clad coins can be soaked in distilled water or‚ to remove tough stains‚ white vinegar. A 6-minute soak in lemon juice may also be used on silver coins. This will not only protect the coin but it will help give the coin a finish at the end of the cleaning
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Kagan McDonald Mrs. Wilmott SAE 2nd 10/1/13 Welding Risk and Safety Precautions Welding is a really good blue collar job that pays well‚ but has its ups and downs. Welders have to deal with hazardous welding fumes that can affect their health in numerous ways. There are several different types of welding fumes and mixtures that a welder can inhale while performing a welding task. A welder’s risk of getting sick from welding depends on the different types of metals being welded and the
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their full devotion into obtaining it. It is a state of being when there is no longer suffering‚ or temptation. One is free from oneself and awakened‚ while being freed from the cycles of death and rebirth‚ withdrawing from kharma. A piece of work dimed “The Life of Buddha as a Way of Salvation”‚ is a written piece that gives insight to Buddhism came to be from the life of
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applications with corrosion resistance and wear resistance C. Austinitic Stainless Steel: iron‚ chromium‚ nickel + low carbon o. All 3xx are austenitic and are nickel chromium alloys p. Non-Magnetic unless cold worked q. Non-Hardenable vi. Can be annealed and stress relieved r. Very low Carbon Content s. Chromium vii. 16-26% t. Nickel viii. 8-24% u. Can be hardened by cold working v. 304 is the most widely used
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the first three alloys exhibited no appreciable corrosion damage whereas pitting corrosion was observed on Nitinol. The results obtained from x-ray analysis of the pitted surface indicated that this pitting could be due to selective dissolution of nickel from
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ETIM MICHAEL CARD 405 WEEK 7 Interview Questions Group A: Standard Questions 1. Tell me something about yourself. I am a hard working employee who is dedicated to get the job done successfully‚ effectively and efficiently. I have a strong background in business management and a variety of job experience. This has helped me to develop valuable skills and abilities I use in my personal and professional career path. 2. Why should I hire you? I
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1. Adsorption: Concentration of liquid or gaseous molecules over the surface of a solid material is known as adsorption. It is a surface phenomenon. (e.g.) H2 adsorption over nickel. The solid material is known as adsorbent. (e.g.) Nickel‚ Silica gel‚ Charcoal‚ Zeolite The gaseous or liquid molecules are adsorbate (e.g.) H2 gas‚ Bromine‚ benzene‚ water vapour For gases‚ a special name is given as “occlusion’ 2.If the concentration is of bulk phenomenon‚ it is absorption
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24/05/2013 Commerce CHM 1046 General Chemistry II Dr. Michael Blaber Electrochemistry Commercial Voltaic Cells Voltaic cells provide a convenient‚ safe and portable supply of electrical energy. The Industrial Revolution marked the development of heat engines‚ and other devices‚ that utilized the energy released from combustion reactions in the form of heat The Digital Age (Electronic Revolution?) revolves around devices that require energy in the form of electrical energy. Such devices
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temperature is about 2‚200-3‚700° C. Outer Core is the third layer. This level is basically liquid. Most of this layer is made from liquid nickel and iron. Outer Core is about 2‚200km thick. The temperature of the Outer Core is 4000-5000°C. Inner Core is the fourth layer of the Earth. The thickness of the Inner Core is 1‚250km and mainly consists of iron‚ nickel and some lighter elements (probably sulphur‚ carbon‚ oxygen‚ silicon and potassium. The temperature in the inner core is about 5000-6000°C
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atom is very unstable and decays to cobalt-59. Then cobalt-59 captures a neutron and becomes cobalt-60‚ which is very unstable and decays into nickel 60. c) How does the radioisotope decay and state its half-life. Cobalt-60 undergoes radioactive decay with the emission of beta particles and strong gamma radiation. It ultimately decays to non-radioactive nickel with a half-life of 5.24 years. d) Identify those properties of the radioisotopes that make it suitable for the use outlined above. Cobalt-60
Free Radioactive decay Ionizing radiation Gamma ray