conclude the chapter with a discussion of the structure and dynamics of macromolecules, specifically illustrating how to apply Newton’s second law to the difficult problem of determining the molecular motions (here in one dimension) of the constituent atoms of a protein. 1. THE CONSTANT FORCE Very frequently in dealing with mechanics problems, we know the forces acting on an
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Arturo Alcaraz (Philippines) - Instrumental in a team of scientists, who in 1967 were able to harness steam from a volcano resulting in the production of electricity. Diosdado Banatao (Philippines) - Improved computer performance throughthe development of accelerator chips, helping to make the Internet a reality. Marie Curie (Poland) - Winner of two Nobel Prizes in Chemistry and Physicsfor her studies into Radioactivity and her discoveries of Radium and Polonium. Paul Dirac (England) -
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electrical charge -Sea of moving electrons (structure) -Lattice of positive ions (structure) 3(b). Describe the structure of an alloy is different to a metal (2 marks) -Different elements with different sizes -Distort layers in the mixture, preventing them from sliding over each other. OR -Irregular pattern of atoms. 3(c). Why is Nitinol used in braces? (1 mark) -Hard/strong/corrosive-resistant/smart-alloy 3(c) (ii). Why are coins not made out of pure copper? (1 mark) -Because it is too
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The Long Road to Direct Factor Xa Inhibitors: A History of Anticoagulation Marjorie Burnsworth Tacoma Community College July 24, 2014 Abstract This paper explores the history of the chemical research and development of anticoagulant medications over the years and how this has lead to the development of direct factor Xa inhibitors (fXa inhibitors). Since ancient doctors first used leeches to treat their patients, people have been aware of the properties of anticoagulants
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INTRODUCTION Molecules can be either organic or inorganic. In chemistry terms, organic means a molecule has a carbon backbone, with some hydrogen’s thrown in for good measure. Living creatures are made of various kinds of organic compounds. Inorganic molecules are composed of other elements. They can contain hydrogen or carbon, but if they have both, they are organic. An organic compound is any member of a large class of chemical compounds whose molecules contain carbon and hydrogen;
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the following planets has the shortest year? a) Neptune b) Jupiter c) Uranus d) Saturn 4. What are the typical sizes of particles in Saturn’s rings? a) about the size of Phobos and Deimos b) mostly dust and pebble-sized c) mostly atom and molecule-sized d) sizes of ring particles have not yet been measured 5. Which of the following best describes the surface of Jupiter? a) No true surface. The atmosphere becomes denser until it is a liquid b) continents and water oceans c) continents
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(Halog). But this particular source is still subject to depletion. Thus, Hydrogen, which has an abundant and unlimited source in Deuterium, can be or will be the future energy reserve. This research includes some of the details about the said element. And will also give the readers knowledge and background about the existence of what might be the possible energy source of the future, Deuterium, and how it will affect Philippines in particular. REVIEW OF RELATED LITERATURE AND STUDIES This
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As time goes on, technological advances need more well-organized sources of power. At the vanguard of research for these power sources are hydrogen fuel cells. This power source takes in the most plentiful element in the universe, Hydrogen, and yields huge power without burning or pollution. The three aspects of this scientific step forward are the fuel cells, hydrogen production, and hydrogen storage. Fuel cells are the devices which convert hydrogen into electricity. The technology uses here
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25cm3 of a gas X contains Z molecules at 150C and 75mmHg. How many molecules will 25cm3 of another gas Y contain at the same temperature and pressure? (A) 2Y (B) 2Z (C) Z (D) Y 4. What mass of water is produced when 8.0g of hydrogen reacts with excess oxygen? (A) 36.0g (B) 8.0g (C) 72.0g (D) 16.0g [H = 1, O = 16] 5. A particle that contains 9 protons, 10 neutrons and 10 electrons is a (A) negative ion (B) positive ion (C) neutral atom of a non metal (D) neutral atom of a metal 6. Cancerous growth
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calculate the other: starting from the elements in their standard states. Na s -> Na g +108kjmol-1 ½ CL2-> Cl g +122kjmol-1 Na g -> Na+ + e- +496kjmol-1 Cl g + e+ -> Cl- g -349kjmol-1 Na s + ½ Cl2 -> NaCl s -411kjmol-1 When drawing the born haber cycles: * Make up a rough scale 1 line of paper to 100kjmol-1 * Plan out roughly first to avoid going off the top or bottom of the paper. The zero line representing elements in their standard state will need to be
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