Chapter (9) Single-Phase Motors Introduction As the name suggests‚ these motors are used on single-phase supply. Singlephase motors are the most familiar of all electric motors because they are extensively used in home appliances‚ shops‚ offices etc. It is true that singlephase motors are less efficient substitute for 3-phase motors but 3-phase power is normally not available except in large commercial and industrial establishments. Since electric power was originally generated and distributed
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Linear Kinematics. Fielding a backhand requires acceleration and deceleration. The fielder must accelerate towards the ball and decelerate when approaching the ball to field it. Acceleration occurs in the first three phases of the backhand and deceleration occurs in the critical phase‚ drive phase‚ when the fielder picks up the ball with their glove. Acceleration helps the athlete gain distance between the fielding positon and the ball. This allows the fielder to get their glove in front of the ball
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A phase transfer catalyst or PTC in chemistry is a catalyst which facilitates the migration of a reactant in a heterogeneous system from one phase into another phase where reaction can take place. Ionic reactants are often soluble in an aqueous phase but insoluble in an organic phase unless the phase transfer catalyst is present. Phase transfer catalysis (also PTC) refers to the acceleration of the reaction by the phase transfer catalyst. Phase transfer catalysts for anion reactants are often
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Phases of the French Revolution The French Revolution was a period of radical social and political upheaval in French and European history. It lasted from 1789 to 1799. There were many phases of the French Revolution such as‚ The estates general‚ National Assembly‚ limited monarchy‚ the first french republic‚ directory‚ and the Napoleonic era phase. The Estates General was the first phase which lasted from (1788-1789) and they only met under unique circumstances‚ there elections and meetings
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graphic language of Hartman‚ “Cold War is a state of tension between countries in which each side adopts policies designed to strengthen it and weaken the other by falling short by actual war”. Infact‚ Cold War is a kind of verbal war which is fought through newspapers‚ magazines‚ radio and other propaganda methods. It is a propaganda to which a great power resorts against the other power. It is a sort of diplomatic war. Origin of Cold War: There is no unanimity amongst scholars regarding the origin of
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solvent‚ water can be used as either a base and an acid. Explain the structure and behaviour of water Similar to many other substances and liquids‚ water takes on numerous forms. It can either be solid as ice‚ gas as steam‚ and its usual liquid phase‚ water. Water molecules are electrically neutral and V-shaped with molecular formula H2O. In water‚ each hydrogen atom is bound to the oxygen atom by an electron pair‚ which is shared between them; this is known as covalent bonding. This process
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Phase 2: Predict‚ analyse and assess the likely impact pathways • Through analysis‚ determine the social changes and impacts that will likely result from the project and its various alternatives • Carefully consider the indirect (or second and higher order) impacts • Consider how the project will contribute to the cumulative impacts being experienced by the host communities • Determine how the various affected groups and communities will likely respond. • Establish the significance of the predicted
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creates a tree-like structure called the syntax tree. * The syntax analyzer checks whether the order of tokens conform to the rules of the programming language. Unmatched parenthesis‚ missing semicolons are some of the errors detected in this phase. * If there are no errors in the code‚ the syntax analyser successfully constructs a syntax tree which is later used by the semantic analyser. Semantic Analysis: * “Semantic” by definition is concerned with meanings. A semantic analyser
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Unit 9 Assignment 1 Phase 1 - Reconnaissance Reconnaissance uses a variety of sources to learn as much as possible about the target business and how it operates‚ including • Internet searches • Dumpster diving • Domain name management/search services • Non-intrusive network scanning • Social engineering Phase 2 - Scanning Once you have enough information to understand how the target works and what information of value might be available‚ you begin the process of scanning perimeter and internal
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Phase Locked Loop: The phase-lock-loop (PLL) is commonly used in microprocessors to generate a clock at high frequency (Fout=2GHz for example) from an external clock at low frequency (Fref = 100MHz for example). The PLL is also used as a clock recovery circuit to generate a clock signal from a series of bits transmitted in serial without synchronization clock (Figure below). The PLL may also be found in frequency demodulation circuits‚ to transform a frequency varying waveform into a voltage.
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