and; • Covalent network substances Metallic substances are substances that are made up of one or more metal. They have regular 3D lattice of positively charged ions. Metallic substances are bond together by metallic bond which has strong electrostatic attraction between the positive ions and the delocalised electrons. These delocalised electrons carry current giving metallic substance the ability to conduct electricity in solid or liquid form. Metallic substances are insoluble in water. Because
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ELECTROSTATICS The Gauss law in electrostatics describes that “the total normal electric flux (Ф) over a closed surface in an electric field (E) is equal to 1/ε0 times the total charge (Q) enclosed by that surface.” Mathematically it may be expressed as‚ ϕ= Q/ε
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Digital Micromirror Device ( Chunhai Ji Introduction The applications of large screen‚ high brightness electronic projection displays include (1) electronic presentations‚ (2) entertainment‚ (3) status and information and (4) simulation (e.g.‚ training‚ and games). So far the electronic presentation market is being driven by the pervasiveness of software that has put sophisticated presentation techniques into the hands of the average PC user. Normally three of projection display techniques
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PHYS113 Lab1: Coulomb’s Law ABSTRACT Performing this experimentation will allow one to investigate the relationship quantitative relationship between the electrostatic force and the distance between charged objects. First a simply observation was made of the electrical forces on two pieces of tape taking note of their attraction and repulsion. This same phenomenon was observed in the experimentation of two charged spheres. Furthermore the we used this experimentation to determine the
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consists of two concentric spherical electrodes; aligned at the same center point. The inner electrode has a radius r1 whereas the outer electrode‚ r2. The voltage difference between the two electrodes is denoted as V. Using Gauss’s theorem and electrostatic principle‚ derive the expression for field enhancement factor of this electrode configuration. (10 marks) Page 2 of 7 Test EEPB463‚ Semester 1 2012/2013 Page 3 of 7 Test EEPB463‚ Semester 1 2012/2013 QUESTION 2 [10 marks] Figure
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8.4 Water 8.4.1 Water is distributed on Earth as a solid‚ liquid and gas y y y Define the terms solute‚ solvent and solution Solution a homogeneous mixture of two or more substances Solute a substance that is dissolved in another substance or the component of a solution present in a lower amount. Solvent a substance which can dissolve another substance or the component of a solution present in a greater amount. Identify the importance of water as a solvent Water is essential as a reactant
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be a possibility of communication between electronic devices on the human body by using personal area network. In this paper we have discussed different types of IBC which were used for intra body transmission such as 1. The simple circuit 2. Electrostatic coupling 3.
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the strong pos. charge of Arginine‚ Methionine is eluted first. (c) Glu and Val (i) Glutamic acid and Valine. (ii) Glutamic acid will elute first. Acids with greater negative charges have a small pKa‚ and are subject to a larger effect from electrostatic forces than acids with more positive charges. Therefore organic acids elute in order of pKa size‚ starting with the smallest pKa values. Valine has a higher pKa than Glutamic acid‚ which means Glutamic acid is eluted off first due to this smaller
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Wireless energy transfer or wireless power is the transmission of electrical energy from a power source to an electrical load without artificial interconnecting conductors. Wireless transmission is useful in cases where interconnecting wires are inconvenient‚ hazardous‚ or impossible. The most common form of wireless power transmission is carried out using direct induction followed by resonant magnetic induction. Other methods under consideration include electromagnetic radiation in the form of microwaves or lasers
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Current is a flow of electrical charge carriers‚ usually electrons or electron-deficient atoms. The common symbol for current is the uppercase letter I. The standard unit is the ampere‚ symbolized by A. One ampere of current represents one coulomb of electrical charge (6.24 x 1018 charge carriers) moving past a specific point in one second. Physicists consider current to flow from relatively positive points to relatively negative points; this is called conventional current or Franklin current. Electrons
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