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The purity of gold can be tested by weighing an object in air and in water. How does this work? How could someone use this to detect a fake gold plated brick?

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The origin of the tensor fasciae latae muscle is the anterior _____ and the surface of the ilium just below the crest. Option A iliac crest Option B ilium Option C acetabulum Option D lumbar

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1. (True or False) The Induction machine is a type of synchronous machine. 2. (True or False) The Synchronous machine is a type of synchronous machine. 3. (True or False) An induction machine may be singly-fed or doubly-fed. 4. (True or False) An induction machine may be connected in wye or delta. 5. (True or False) In variable speed drives applications the induction machine is connected in delta. 6. (True or False) An induction machine is used in generation most often in wind energy applications. 7. (True or False) Stall-torque is the torque a machine can deliver when it is operating at its rated speed. 8. (True or False) Pull-out or maximum torque is the torque a machine can deliver at stand-still. 9. (True or False) An induction machine operating at maximum torque is not necessarily operating at its most efficient point. 10. (True or False) “Slip” is the metric associated with an induction machine and is the difference between synchronous speed and actual speed, scaled by synchronous speed. 11. (True or False) Induction machine core losses are primarily associated with the stator. 12. (True or False) In general the better the machine quality the higher Rc and Xm will be. 13. (True or False) At “stall” you can easily find the output torque by taking Pout /wm. 14. (True or False) At maximum torque (pull-out), the machine will operate at maximum “slip” and at minimum PAG. 15. (True or False) Data for R1 , X1 , Rc , Xm , R1 , and X2 can be found by conducting tests that follow the IEEE 112 Standard. 16. (True or False) Synchronous machines are either “wound field” or “permanent magnet field”. 17. (True or False) Synchronous machines that are “wound field” find their greatest use generation. 18. (True or False) “Wound field” synchronous machines often employ what is known as an “exciter” stage. 19. (True or False) Frequencies of variables associated with the rotor of an induction machine are at the excitation frequency. 20. (True or False) All machines have a “torque vs. speed” curve, but they differ from each other based on how the machine operates.

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When Darwin and Wallace developed the theory of Natural Selection, they were missing a vital piece of information to help explain the process. What was this vital piece of information and how can we use that information to further explain evolution today.

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Consider the right triangle where O = 15 ft and H = 26.63 ft. Find an approximate value (using three or more significant figures) of each of the following. Provide your answers with units and for the angles, use "degree". ? 15.00ft 90° d. ? = e. ? = f. A = 26.63ft ? A

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Use appropriate anatomical and regional terminology to fill in the blanks in the questions below.

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Q2 Le t \( \mathrm{X} \) be a RV having the following truncated Poisson distribution \( P(X=x)=\frac{e^{-\lambda} \lambda^{x}}{\left(1-e^{-\lambda}\right) x !}, \quad x=1,2, \ldots \infty \). Show that \( E(X)>\operatorname{Var}(X) \). Q3 Show that \( \mathrm{X} \) is a Poisson random variable with parameter \( \lambda \), then

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Q3:In the given figure, if the potential difference on the 10 resistance is 20 V,the potential difference between the points a & b equals: 1009 a W 100 100 W

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2. Three equal impedances of (8 + j6) ohms are connected across a 3-phase supply. The phase voltages are \(V_a = (220 + j0)\), \(V_b = (-j220)\), and \(V_c = (-100 + j220)\) V. Calculate the symmetrical components of the voltages and currents.

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The diagram below shows the vertical cross-section of a proposed embankment to be constructed on a saturated clay deposit. Representative soil samples have been collected from the clay deposit and laboratory tests have been conducted which provided the following results: Psat = 2000 kg/m³, At rest earth pressure coefficient ko = 0.5, c' = 10 kPa, and φ = 28°. Proposed embankment (plan area of 10 m x 20 m) Ground surface V 30 kPa Deep saturated clay deposit 01 3m er Table Not-to-scale (a) Prior to construction, calculate the pore water pressure u, σ1, σ3, σ1', and σ3' acting on the soil element at 3m below ground surface. Using this information, draw the total and effective stress Mohr circles representing the stresses acting on the soil element. In your calculation, you can assume g = 10 m/s². (12 marks) (b) After the embankment construction, demonstrate that there is an increase in vertical stress, i.e. Δσo = 20 kPa, on the soil element caused by the embankment load. You may assume that the 2:1 stress transmission approximation is valid for this situation. (4 marks)

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