Chapter 1 Chemical Reactions and Equations Q.1. Why should magnesium ribbon be cleaned before burning in air ? Ans: Magnesium ribbon is a very reactive metal. When stored it reacts with oxygen to form a layer of magnesium oxide on its surface. This layer of magnesium oxide being a stable compound prevents further reaction of magnesium with oxygen. The magnesium is cleaned before burning in air to remove this layer so that the metal can be exposed to air properly. Q.2. Write the balanced
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MECHANICAL SEALS FOR PUMPS S. Raghavachari Consultant Chennai Abstract Mechanical seals are pieces of engineering marvel. Process industries could meet today’s stringent environmental pollution regulations through the effective sealing of even the most difficult fluids. This paper describes different kinds of seals‚ their design‚ properties and functioning. Effect of various factors like seal balance‚ face pressure‚ temperature and lubrication on performance of seal and probable causes
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JET ENGINE PROPULSION – TYPICAL ULTILEARN QUESTIONS 1. In 1930‚ who first patented a design for a reaction (jet) type motor suitable for aircraft propulsion? a) Sir Frank Whittle b) Sir Henry Royce c) Hon. Charles Rolls d) Henry Ford 2. What is an advantage axial flow compressors have compared to centrifugal compressors? a) Axial flow compressors are less complicated b) Axial flow compressors are lighter c) Axial flow compressors can surge d) Axial flow compressors achieve higher pressure ratios
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World’s Chemical Industry 1.1 Scope of the chemical industry. 1.2 Category wise breakdown of the chemical industry. 1.3 Research and development in the chemical industry. 1.4 Classification of the chemical industry development of Pakistan – Vision 2030. CHAPTER 2 Potential for the development of secondary chemical industries based on feedstocks derived from primary industries. 2.1 Feedstocks derived from primary industries for the potential development of secondary chemical industries
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Chemical Bonding Chemical compounds are formed by the joining of two or more atoms. A stable compound occurs when the total energy of the combination has lower energy than the separated atoms. The bound state implies a net attractive force between the atoms ... a chemical bond. The two extreme cases of chemical bonds are: Covalent Bonds Covalent chemical bonds involve the sharing of a pair of valence electrons by two atoms‚ in contrast to the transfer of electrons in ionic bonds. Such bonds lead
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IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) e-ISSN: 2278-1684‚ p-ISSN: 2320-334X PP 60-63 www.iosrjournals.org Can crusher machine using scotch yoke mechanism Shadab Husain1‚ Mohammad Shadab Sheikh2 5th semester‚ Mechanical Engineering Student ‚ Anjuman college of Engineering and technology‚ Nagpur‚ India ABSTRACT: Nowadays in India‚ recycling is one of the areas which is rapidly increasing day by day. The amount of waste coming is in a tremendous quantity. Aluminium cans and Tin
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1. Pre mechanical period 2. Hindus in india 3. Difference engine 4. Rags modern day papermaking 5. Johann Gutenburg 6. Sumerians 7. Joseph marie jacquard 8. Y or circle 9. Voltaic battery 10. Computers 11. Cuneiform 12. The first information explosion—the first special purpose “computers”—Babbage engine—punch card 13. Abacus 14. Symbols 15. Joseph marie jacquard 16. Egyptians 17. Slide rule William Oughtred 18. Charles babbage
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Absorption Spectroscopy Author: Lab Partners: Instructor: Chem 152 Date Work Performed: Date Work Submitted: Abstract A Beer’s Law analysis was used to determine the molar absorptivity of a Red-40 food dye. Using a spectrometer‚ the best wavelength to use for the analysis of this dye was determined to be 501nm. A series of dilutions were performed and the concentrations were calculated to find ‘E‚’ the molar absorptivity‚ which was determined to be 18035 M-1 cm-1. Introduction
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Introduction Atomic Absorption Spectrometer (AAS) is an analytical equipment commonly used for the detection of heavy metals in particular sample. The first step to analysis in the AAS is the atomization of the desired element by converting it to a gaseous state. The atoms then absorb the energy emitted from the hollow cathode lamp corresponding to the desired element and a detector reads the signal and records the results. The results may be used quantitatively or qualitatively depending on the
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Sound is a vibration that spreads across a medium (i.e.‚ air or water) as a mechanical longitudinal wave formed by pressure. A Mechanical longitudinal wave can also be called compression wave as it generates compressions and rarefaction when traveling through a medium. (Sound Is a Pressure Wave - Physics Classroom) The amplitude of a sound wave is the difference between the pressure of the undisturbed air and the maximum pressure caused by the wave. The Speed of sound deviates with the temperature
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