of charged particles through a static medium under the action of an applied electric field (p. 576). Just from this definition‚ it is clear that numerous physics concepts can be used to help explain why electrophoresis works. First‚ I will discuss charge and electric fields and how these principles are utilized in gel electrophoresis. This will be followed by a
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raising the potentials of charges‚ which flow into its negative terminal and then flow out of its positive terminal. We will also see that power you can extract from a real source is maximized for a particular value of load resistor. Consider a (positive) charge‚ which flows through the battery from the negative terminal to the positive terminal. The battery raises the potential of the charge by‚ so the work the battery does on the charge is. The total amount of charge‚ which flows through the battery
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1. What is the purpose of science? The purpose of science is to understand. With science‚ we ask questions‚ seek answers‚ and prove or disprove our theories and speculations. According to the text on page 10 “Science is a way of knowing about the natural world.” (Citations will be provided at the end of the worksheet‚ rather than a continuous re-pasting each time.) 2. Define organism. Give an example of a unicellular organism. According to the text on page 3‚ “Organisms‚ such as trees and humans
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offering its charge card. For American Express‚ the first indication of a crisis appeared in 1995‚ when its card spends began to stagnate. In 1996‚ the average card spends hovered around Rs. 35‚000 to 40‚000 per annum band and did not show any signs of increasing. Should AMEX have been concerned? After all‚ its average card spends were still two-and-a-half times that of the industry average. THE BACKGROUND Robert McNamara set up Diners’ Club in 1950 which issued charge cards to its
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of electricity - Electrical discharge is caused by an imbalance between positive and negative charges in the atmosphere - Colliding particles of rain‚ ice‚ or snow increase this imbalance and often negatively charge the lower reaches of storm clouds - Objects on the ground‚ like steeples‚ trees‚ and the Earth itself‚ become positively charged - A step-like series of negative charges‚ called a stepped leader‚ works its way incrementally downward from the bottom of a storm cloud toward
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micelle is highly hydrated. The caseins in the micelles are held together by calcium ions and hydrophobic interactions. Casein’s isolelectric point is 4.6. It has a negative. The isoelectric point (pI) is the pH of a solution at which the net primary charge of a protein becomes zero. At a solution pH that is above the pI the surface of the protein is predominantly negatively charged and therefore like-charged molecules will exhibit repulsive forces.
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floating charge over the company’s assets. 15.2 FIXED CHARGE This is a charge which immediately encumbers specific assets of the company. Accordingly‚ the chargee’s (bank) consent would be required if the company is to deal with or dispose the assets charged. It usually attaches fixed assets such as land‚ plant and machinery‚ fixtures and fittings. The fixed charge may be either be a legal or an equitable charge but if future assets are to attached it would be necessary for the charge to be
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electricity due to the charges within the water. Distilled water is a liquid covalent compound where there are no charges or minerals and ions floating around and thus no electricity is conducted. The conductivity of either
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placing the sample in an electric field. This phenomenon was first observed in 1807 by Reuss from Moscow State University who noticed that a constant electric field caused clay particles dispersed in water to migrate. It is caused by the presence of charges of the surface of the particle and the surrounding fluid. This was perfected in 1937 by Arne Tiselius (1902-1971). It is used in forensic medical laboratories; for example‚ to detect food-adulteration‚ such as soya in pork products. It also has many
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Max:60 Scores 1. Three identical charges each +q are placed at the corners of an equilateral triangle of side d cm. Calculate the force on a +ive charge +2q at the centroid of the triangle. 2 2.If the earth is supposed to be a metallic sphere‚its capacity will be nearly (a) 700pf (b) 700 microfarad (c) 700f (d) 6.4 X10^6 f 1score 3. write the relation between dielectric constant and electric susceptibility. 1score 4. A box encloses an electric dipole consisting of charge 5micro C and -5micro C and of
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