Zealand) - Nuclear model of atom 16. Niels Bohr (Denmark) - Quantum model of hydrogen atom 17. C.V.Raman (India) - Inelastic scattering of light by molecules 18. Louis Victor de Borglie (France) - Wave nature of matter 19. M.N.Saha (India) - Thermal Ionisation 20. S.N.Bose (India) - Quantum statistics 21. Enrico Fermi (Iyaly) - Controlled nuclear fission 22. Werner Heinsberg(Germany) - Quantum mechanics; Uncertainty principle 23. Paul Dirac (UK) - Relativistic theory of electron; Quantum
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6910.3 kJ·mol−1 Atomic radius 186 pm Covalent radius 166±9 pm Van der Waals radius 227 pm Miscellanea Crystal structure body-centered cubic Magnetic ordering paramagnetic[1] Electrical resistivity (20 °C) 47.7 nΩ·m Thermal conductivity 142 W·m−1·K−1 Thermal expansion (25 °C) 71 µm·m−1·K−1 Speed of
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Chemical Earth 1. The living and non-living components of the Earth contain mixtures Construct word and balanced formulae equations of chemical reactions as they are encountered 1. Build a word equation Reactants on left‚ Products on right 2. Convert word equation into chemical formula for the reactants and products Using valency rules 3. Balance the equation Adjust coefficients to get equal numbers of each kind of atom on each side 4. Specify the physical state for each species present
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i Free Convection Cooling Variation in Terms of Position By Joseph Saba Rula Dahdal Wassim Naddi Submitted to Dr. Michel Daaboul A research paper submitted in partial fulfillment of the requirements of the course MECH 321 Heat Transfer Faculty of Engineering University of Balamand June 2012 Copyright © 2012‚ Joseph Saba‚ Rula Dahdal‚ Wassim Naddi All Rights Reserved ii ABSTRACT This research paper aims is to introduce a brief positioning on how we can enhance the
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completion of this project. CHAPTER: I 1.0 Introduction Man’s constant evolution couldn’t have been possible without fuels. Society is putting more emphasis on the mobile transportation sector to achieve future goals of sustainability and on low thermal efficiencies of IC engine. About 60% of heat-energy liberated during combustion of fuel is not utilized in producing useful work and getting dumped into the atmosphere daily. To achieve these goals‚ society needs to jump to a new method to recover
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Topic 4 - Bonding 4.1 Ionic bonds 4.1.1 Ionic bond: +ve (cations) and -ve (anions) ions are attracted to each other and form a continuous ionic lattice 4.1.2 Group 1 metals form +1 ions‚ group 2 metals form +2 ions‚ metals in group 3 form +3 ions . Examples : Li+‚ Mg2+‚ Al3+. Greater ease of ionisation Li->Cs is due to the increased electron shielding of the nuclear attraction caused by additional inner shells of electrons. The easier atoms are to ionise‚ the more reactive they
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started to cool it. They found that as the material made the transition to the superconducting state‚ the flux was expelled. This is called the Meissner-Ochsenfeld effect. It shows that a superconductor is characterized by more than just perfect conductivity; it also displays perfect diamagnetism. There exist two types of superconductors: Type I superconductor has one critical field‚ above which superconducting regions diminish in size and finally disappear in critical
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Manufacturing of Aerogel Aerogel was found by Steven Kistler in 1931‚ but its application cannot be in the market and consumer because there is no item that can use the aerogel. The 1980s the aerogel have a place to be a raw material in existing and new product after they discover a new research about aerogel. They have been considered as a new development material that better than polyurethane foam in refrigerators‚ and as a heat insulator for windows. Aerogel is produced by removing all the
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graphite is negligible at standard conditions. Diamond is renowned as a material with superlative physical qualities‚ most of which originate from the strong covalent bonding between its atoms. In particular‚ diamond has the highest hardness and thermal conductivity of any bulk material. Those properties determine the major industrial application of diamond in cutting and polishing tools and the scientific applications in diamond knives and diamond anvil cells. Because of its extremely rigid lattice‚
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bullets (bismuth-tin alloy) since it has similar properties to tin and lead. . Bismuth is a solid like most metals in room temperature; it has a high Malleability and a high-density (9.78 g·cm−3) rate. Except from Mercury‚ Bismuth has lowest thermal conductivity of all metals! Bibliography:
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