agricultural machinery. Examples of ceramics used are alumina and zirconia * Ceramics have high hardness and toughness values making them useful in the manufacture of cutting tools and shielding armor. examples of materials used are alumina and boron carbide Advanced Ceramics find application in specific areas such as: * NANOMATERIALS Ceramics find application in nano-materials as ceramic nano-composites i.e. second phase particles‚ fibers and whiskers are incorporated into the ceramic
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words. model answer: A gas-cooled nuclear reactor consists of the reactor itself and a heat exchanger. The reactor contains uranium fuel elements which are surrounded by graphite moderators and topped by charge tubes for loading fuel elements‚ and boron control rods. The whole reactor is contained in a pressure
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Apache AH-64A‚ this aircraft is used in the battlefield‚ so taking hits is unavoidable‚ this basic structure allows the AH-64A to receive hits and still be able to operate. The crew and vital components are protected by armour composed of bonded boron carbide and Kevlar. When shot at‚ the Kevlar backing gives and expands to absorb the remaining energy and prevents the shrapnel from entering the aircraft. Other uses of Kevlar: Body armour (bulletproof vests‚
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He had a good experience in managing start-up companies and developing their business plans. Agro limited deals with the special type of chemical compound named Borono-198 which is was a new fungicide in the market. Borono-198 was combination of boron and chloro group effective for biological activities.Borono-198 had tremendous results against harmful fungus in cash crops‚ oak trees and fluid tanks. It was available at low prices from all other fungicides from competing companies. 10‚000 gallons
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SUBMISSION INSTRUCTIONS: WHAT: Printed questionnaire with the answers written in a big yellow booklet. One page per number. Paginate each page accordingly. Use different inks to distinguish the bonds of electrons for numbers involving molecular structure. WHO: All students with Student Number ending in ODD number will answer Set A while students with Student Number ending in EVEN number will answer Set B. Indicate your Student Number and the Set you are answering in front of the yellow
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Chemistry 1. Explain why 0-nitrophenol has a lower boiling point than p-nitrophenol? 2. Why alkali metals used in photoelectric cells? 3. Due to which compound‚ ozone depletion is caused in Antarctica? 4. Which of the element among B‚ Al‚ C and Si :- a. Has the highest first ionization enthalpy? b. Has the most negative electron gain enthalpy? 5. c. Write the atomic number of the element present in the third period and seventeenth group of the periodic table
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Mass Determination of Ca‚ Fe and Zn in a multivitamin using Atomic Absorbance Spectroscopy (AAS) and X-Ray Fluorescence Spectroscopy (XRF) ABSTRACT: The purpose of this project was to determine the amount of calcium‚ iron and zinc present in an over the counter multivitamin. This mass was determined using atomic absorption spectroscopy (AAS) and X-ray fluorescence spectroscopy (XRF). For both analytical techniques‚ the method of standard additions was used to compensate for matrix effects.
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H2 Chemistry 9647 Term 3 Block Test 2010 – Examiner’s report H2 CHEMISTRY 9647 Paper 2 (Section A) Structured Questions Question 1 – Atomic Structure and Redox Titration Most elements exist in nature as mixture of isotopes. At present‚ there are about 1600 known isotopes‚ of which only one-sixth are stable. The unstable isotopes lose energy by emitting ionising particles or radiation through the process of radioactive decay. Ernest Rutherford and later Paul Villard discovered the three
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Bangladesh has a primarily agrarian economy. Agriculture is the single largest producing sector of the economy since it comprises about 18.6% (data released on November‚ 2010) of the country’s GDP and employs around 45% of the total labor force. The performance of this sector has an overwhelming impact on major macroeconomic objectives like employment generation‚ poverty alleviation‚ human resources development and food security (Wikipedia). 2012 was yet another year where farmers bagged another
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into a containment tank. 00:00:04 Back up Pumps turn on- Lights on the control panel indicated to the operators that the secondary loop water pumps have been turned on. They are unaware that the pumps are disengaged and not performing. 00:00:09 Boron and Silver rods are lowered into the reactor. Control Panel Light Goes out which indicates the valve is closed- the lowering of the rods slows down the reaction rate and the amount of heat produced. With the panel light going out the operators assume
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