CH 2 -According to Aristotle‚ larger‚ heavier objects were supposed to fall to the ground faster than smaller‚ lighter objects. Galileo performed a number of experiments to Aristotle’s pronouncements‚ that two objects of different weight dropped from the same height fall down at exactly the same rate. -Copernicus published his findings in 1543‚ the same years as his death‚ in a text entitled (On the Revolutions of the Celestial Spheres). -Heliocentric theory was proposed by Aristarchus of Samos
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nobody knew how to explain it or what to do with it. Experiments using friction to generate static electricity led to machines that could produce large amounts of static electricity on demand. In 1660 German Otto von Guericke made the first electrostatic generator with a ball of sulfur and some cloth. The ball symbolized the earth‚ and he believed that this little replica of the earth would shed part of its electric “soul” when rubbed. It worked‚ and now scientists could study electric shocks and
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Why does sodium chloride have a higher melting point than water? Sodium chloride is considered as a giant ionic structure because it consists of repeating lattices of ions. Water only has two hydrogens and one oxygen molecule. There is a strong electrostatic force between sodium and chloride‚ it has no lone pairs and requires more energy for the bond to be broken. The molecule‚ sodium chloride‚ is small and this increases the forces of attraction between the two atoms. 3. Explain why sodium chloride
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Electrolysis Feb. 22‚ 2012 Introduction: Jan Rudolph Deiman and Adriaan Paets van Troostwijk used in 1789 an electrostatic machine to produce electricity which was discharged on electrodes in a jar with water. In 1800 Alessandro Volta invented the voltaic pile‚ a few weeks later William Nicholson and Anthony Carlisle used it for the electrolysis of water. When Zénobe Gramme invented the Gramme machine in 1869 electrolysis of water became a cheap method to produce hydrogen. A method of industrial
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It involves the interaction between all pairs of atoms excluding the bonded atom as it is already involved in bonded term. For weak dipole attraction and repulsion depending upon distance between atoms is accounted by the Lennard-jones potential which is given by:- 2) VMD :- It is a program for molecular visualization‚ modelling and analysis of biological systems like proteins‚ nucleic acid‚ and lipid bilayer assemblies. VMD also gives option to work with volumetric data‚ sequence data
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EVPP 305 Study Guide Aeromicrobiology 1. What is Aeromicrobiology? a. Study of microorganisms present in the air b. Indoor and outdoor air c. Airborne transmission of environmentally relevant microorganisms i. Bacteria‚ viruses‚ fungi‚ yeasts‚ and protozoans 2. Name one airborne microbial toxin? d. Eg. Toxin from Clostridium botulinum – potential biological warfare agent e. Neurotoxin f. Lethal dose – 0.3 µg by inhalation 3. Is
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bonds with O of Ala6‚ O of MSE1 and N of MSE1 respectively of Microcin C7. The CE1 of His21 and CA of Ala62 of Diphtheria toxin form carbon hydrogen bond with O of Asn5 and O of Asn7 respectively of Microcin C7. Tyr65 of Diphtheria toxin forms electrostatic non bond with OXT of Asn7 of Microcin C7. The Pi-orbitals of His 21 of Diphtheria toxin form non bond with lone pair of O of Ala6 of Microcin C7. Tyr46 and Tyr65 of Diphtheria toxin form hydrophobic interaction with Arg2 and Ala6 respectively of
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atmosphere. This is when things started turning our way. Our idea to get water on Mars‚ is to use the atmosphere. This is also where my blueprint comes in. My idea is to create a water generator and to use it on the atmosphere. I first will have an electrostatic filter on the right part of the generator‚ and at the left part will be a fan. The fan will be drawing in moist air through the filter‚ and in the center of the generator will be a electrically heated coil. Using that coil‚ the coil will warm up
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magnetic circuit. It is found that a current of 4 A in the winding‚ produces a flux density of 1 T in the air-gap. Find (i) the relative permeability of the mild steel and (ii) inductance of the winding. ( µ0 = 4π ×10−7 ) (a) State coulomb’s law of electrostatics. (b) Define capacitance. Derive an expression for the total capacitance of a group of capacitance when (i) they are connected in series (ii) they are connected in parallel. (c) A series combination having R = 2 M Ω and C = 0.01 µF is connected
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