EMA TUTORIAL 7 SOLUTIONS Micro-Actuators Question 1 Solution a) The electrostatic energy for each pair of capacitor palates is 1 1 A 1 0 tV 2 We CV 2 0 V 2 x 2 2 d 2 d The electrostatic force is given by 1 0 tV 2 Fe 2 d The total driving force acting on gripper for ( n capacitors 2 sides) is F 2n Fe n 0 tV 2 d For numerical values, F n 0tV 2 d 200 8.55 10 12 50 10 6 140 2 0.335 mN 5 10 6 b) From the motion
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of armature and field conductors iii) Overall length and diameter of machine. 3. State the relationship between number of armature coils and number of commutator segments in a dc machine. The relationship between number of armature coils and number of commutator segments in a dc machine is where - commutator segment pitch C- no. of coils D- diameter of commutator 4. State different losses in a dc generator. a) Copper losses: (i) armature copper loss (Ia2 Ra) ii) field copper loss (I2snRsh
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SEQUENCE OF ELECTIRCAL OPERATION SEQUENCE OF ELECTIRCAL OPERATION The electrical sequence between a freezer and a cooler are wired almost the same except for a freezer has a defrost heater, defrost thermostat, and clock motor to be able to turn the compressor, evaporator and condenser fan motors off when the clock motor is in a defrost duration. When the clock motor clicks it stops sending power to the components I just listed above and then sends power through the thermostat and then to the
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1 WHAT IS A FIELD STUDY? The field study is an integral part of the HDSR Program, and is the basis for much of the upper level course work required by our majors. The field study allows students to: • gain experience in integrating the theoretical perspectives learned in the classroom with experiences gained in the field; • achieve insight into the workings of an organization; • become more conscious of the relationship of social roles, institutional dynamics, and larger cultural systems. When students
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Question number 1 (a) (b) (i) Answer total internal reflection prism drawn in correct orientation (by eye) Accept TIR Notes Marks 1 1 1 Accept a freehand sketch of the triangular prism Size of prism unimportant, e.g. can fill the entire square, but horizontal and vertical edges must be drawn correct reflection of rays (by eye): (ii) Accept freehand sketch Accept correct external reflection e.g. reflection as shown below gets 1 mark for 1(b)(ii) despite the error in the 1(b)(i) response
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running out of easy oil and gas,” Leber, (2012). The technology used to recover oil and natural gas from wells has not changed in the past decade. Our business model for this new division will guide PXP into the future by incorporating digital oil field technology to our existing sites both on land and water. Consumers will benefit by lower prices at the pumps, lower airfare for travel and the transportation costs for products will be reduced, making product prices lower. Offshore oil is much more
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EXPERIMENT 9: KIRCHOFF’S RULES Introduction Kirchhoff’s Law is defined through two separate components which are Kirchhoff’s Current Law and Kirchhoff’s Voltage Law. These two laws are collinearly related through its total summation being which is equal to 0, except that for Kirchhoff’s Current Law having its variables to be of currents flowing into and outward a node (fig.1), and for Kirchhoff’s Voltage Law having its variables in terms of the drops and rises of its voltages in a closed loop (fig
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This decrease of the coercive field strength for n < 6.0 can be avoided by reducing the annealing temperature to 850°C. According to the irreversible part of the FMR-spectra in figure 2 (right) showing no shift of the high field resonance peak with decreasing annealing temperature, the effective anisotropy field strength of the samples is not influenced, whereas the transition from incoherent to coherent magnetization reversal, indicated by the height of the low field resonance peak, by reducing
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Field of Dreams Synopsis of reviews/articles written about the film Based on the review written by Roger Ebert (Ebert, 1989) The farmer Ray Kinsella is in the middle of his cornfield when he first begins hearing voices “If you build it, he will come.” Prior to the farmer hearing voices, Field of Dreams is a sensible film about a young couple who want to run a family farm in Iowa. When the voice speaks for the first time the audience is stumped with the thought of this movie turning into a religious
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Partners: Joseph Dea Adrian Capinpin Plotting Electric Potential Lab Purpose: To understand and experiment with electric potentials and examine electric fields, from their directions to their strengths and their behavior. Also, to map electric equipotential lines and electric field lines for two-dimensional configurations. Procedure: Starting the first of two parts of our lab (part A), we began by setting up our equipment. We first set up our conducting paper and pushed two aluminum push
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