I want to design a 3 phase cyclo-converter to run a 7-5kW induction mo.docx

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I want to design a 3 phase cyclo-converter to run a 7.5kW induction motor. The input to the cyclo-converter is 50Hz AC and the output of the cyclo-converter should be 60Hz AC. What are the specific ratings of thyristors for designing the above? Solution As per Wikipedia\'s page on cycloconverters, firstly they are only used for producing a lower frequency. Secondly, they are only financially sensible at megawatt powers. As for thyristors\' ratings, they will be in their respective datasheets. A Google search for \"50Hz to 60Hz\" gives a plethora of options for achieving what you want. There are plenty of off-the-shelf solutions as well as cheaper home-brew methods. .

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I having problems locating the fasb\'s conceptual framework Solution The Conceptual Framework include: measurement attributes used to measure and report economic transactions, events, and arrangements in financial statements; and accounting principles and assumptions that guide recognition, derecognition, and disclosure, as well as the classification and presentation of information in financial statements. Fundamental qualitative characteristics, relevance and faithful representation allow for decision usefulness. Information that is capable of making a difference in decisions made by financial statement users is relevant. The three components of relevance are: Faithful representation is when the words and numbers accurately predict the economic substance of what they purport to represent. The three components of faithful representation are: .

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rtodd409

I have two questions regarding linked lists in C. 1) We often declare a struct called \"Node\" for the linked list that has \"data\" and \"next\" fields. Why is it a problem to attempt to access data in a node that doesn\'t exist? 2) In regards to the sizeof() function, why is it that the size of a struct or node may be larger than the elements it contains? Solution Answer: 1) It is difficult because every node has a specified next node. Suppose we want to access data whose node does not exist so we have to first search that node isn\'t it? And since the node we are searching isn\'t in the list that is why we cannot extract data which is not there. 2) Size of the struct node may be larger than the elements it contains because along with data, some pointers also stored to access the next element. .

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I have a questions which is what could be the advantage or disadvantage of importing data files using the uiimport wizard in matlab? please list couple of them with explanations would be deeply appricaited! Solution Advantages of importing data files using uiimport command or selecting import data option in matlab file menu: It is used to import differenent types of ASCII data including data on the clipboard. This wizard helps the user by providing series of dialog boxes to provide the name of file,delimiters and set of variables we want to import. User friendly interface is provided to import files with required fields. Disadvantages: Matlab is an interpreted language, it can be slow, and poor programming practices can make it unacceptably slow. .

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I have a sealed container that is pressurised with Nitrogen. When calculating the density of a gas inside a container using d = (M * P) / (R *T) M = molar mass, P = pressure, R = gas constant, T = temperature. When putting in the molar mass for nitrogen do i need to put in the value of N = 14.0067, or that of N2 = 28.0134, given that N2 is the natural state? Also, why? Thank you Solution See, the pressure in the container is due to N2 gas not due to N atoms. So, the molar mass that should be taken is of N2 gas. Also, this expression is basically derived from ideal gas equation: PV = n RT Where n is number of moles of gas n = given mass of gas(m)/molar mass of gas(M) Here molar mass is for gas( if nitrogen then N2) PV = mRT/M PM = mRT/V PÃ—M/(RÃ—T) = m/ V = d d = P*M/(R*T) So, molar mass taken is of N2 .

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I have a question from a Database Systems class (we have been taught with MySQL). Please provide an answer to the following question: Most large DBMS\'s have their own DML. What are some of the DML\'s out there? (Please provide a quality response and not just a short answer. Citations to the answer would be appreciated). Solution Answer:) Some of the DML\'s are: i. CALL : supported by PL/SQL ii. DELETE: removes a/multiple tuple or the entire table iii. EXPLAIN PLAN : supported by PL/SQL iv. INSERT: used for inserting values to a table v. LOCK TABLE: used for finalizing the table vi. MERGE: used for merging two or more table vii.SELECT: used to project data values from a table viii. UPDATE: used to update a table .

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rtodd409

HW Check: Categorize materials as n or p type semiconductors: a. Zn doped GaAs >>> p-type b. In 1+x As 1-x >>> n-type c. Li 0.05 Cu 0.95 O >>> p-type d. WO 2.999 >>> n-type Solution Answer - a.Zn doped with GaAs -It form p type semiconductors. As zinc is Zn +2 in ionic state. Zn have 2 electron in valance shell. b. In 1+x As 1-x it forms n-type semiconductor because ln(1+x) have more electrons then As(1-x) . c. Li 0.05 Cu 0.95 O is p-type as cu forms cu 2+ , During conduction d. WO 2.999 Here the conncentration of O is greater than W, hence it forms n-type semiconductor. All answer correct. .

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