Engineering Questions

It is proposed to deposit a 5 μm thick nickel coating uniformly on all surfaces of a ceramic strip measuring 15 cm x 5 cm x 2 cm by employing a vapor-phase deposition (evaporation-condensation) technique. The vapor pressure-temperature relationship for liquid Ni is of the following form: ln p (atm) = -(51,590/T) – 2.01 ln T + 32.40. The normal melting point and boiling point of nickel are 1453°C and 2730°C, respectively, and the density and atomic weights of Ni are 8.91 g.cm^-3 and 58.71 atomic mass units respectively. Calculate the energy in joules needed to evaporate the required quantity of nickel.
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Which of the following is not necessary a reason to machine a brake drum?A. TaperB. Minor scoring C. Out-of-roundness D.pulsation
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Although the viscoelastic response of a polymer can be very complex (time-dependent stress cycling for instance), two special loading scenarios are fairly simple to describe mathematically. _____________refers to scenarios for which the stress applied to a polymer must decay over time in order to maintain a constant strain. Otherwise, over time, the polymer chains will slip and slide past one another in response to a constant applied load and the strain will increase (in magnitude). _____________refers to scenarios for which a polymer will permanently flow over time in response a constant applied stress.
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In space terms, what does EVA stand for
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1. When two vehicles moving at the same speed are involved in a collision, the vehicle that
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Why or why not the following materials will make good candidates for the construction of a) Turbine blade for a jet turbine and b) Thermal barrier coating. Cement, aluminum, engineering ceramic, super alloy, steel and glass
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(a) For a given material, would you expect the surface energy to be greater than, the same as, or less than the grain boundary energy? Why? (b) The grain boundary energy of a small-angle grain boundary is less than for a high-angle one. Why is this so?
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IN JAVA,Knapsack ProblemThe file KnapsackData1.txt and KnapsackData2.txt are sample input filesfor the following Knapsack Problem that you will solve.KnapsackData1.txt contains a list of four prospective projects for the upcoming year for a particularcompany:Project0 6 30Project1 3 14Project2 4 16Project3 2 9Each line in the file provides three pieces of information:1) String: The name of the project;2) Integer: The amount of employee labor that will be demanded by the project, measured in work weeks;3) Integer: The net profit that the company can expect from engaging in the project, measured in thousandsof dollars.Your task is to write a program that:1) Prompts the user for the number of work weeks available (integer);2) Prompts the user for the name of the input file (string);3) Prompts the user for the name of the output file (string);4) Reads the available projects from the input file;5) Dolves the corresponding knapsack problem, without repetition of items; and6) Writes to the output file a summary of the results, including the expected profit and a list of the bestprojects for the company to undertake.Here is a sample session with the program:Enter the number of available employee work weeks: 10Enter the name of input file: KnapsackData1.txtEnter the name of output file: Output1.txtNumber of projects = 4DoneFor the above example, here is the output that should be written to Output1.txt:Number of projects available: 4Available employee work weeks: 10Number of projects chosen: 2Number of projectsTotal profit: 46Project0 6 30Project2 4 16The file KnapsackData2.txt, contains one thousand prospective projects. Your program should also be able to handle this larger problem as well. The corresponding output file,WardOutput2.txt, is below.With a thousand prospective projects to consider, it will be impossible for your program to finish in areasonable amount of time if it uses a "brute-force search" that explicitly considers every possiblecombination of projects. You are required to use a dynamic programming approach to this problem.WardOutput2.txt:Number of projects available: 1000Available employee work weeks: 100Number of projects chosen: 66Total profit: 16096Project15 2 236Project73 3 397Project90 2 302Project114 1 139Project117 1 158Project153 3 354Project161 2 344Project181 1 140Project211 1 191Project213 2 268Project214 2 386Project254 1 170Project257 4 427Project274 1 148Project275 1 212Project281 2 414Project290 1 215Project306 2 455Project334 3 339Project346 2 215Project356 3 337Project363 1 159Project377 1 105Project389 1 142Project397 1 321Project399 1 351Project407 3 340Project414 1 266Project431 1 114Project435 3 382Project446 1 139Project452 1 127Project456 1 229Project461 1 319Project478 1 158Project482 2 273Project492 1 142Project525 1 144Project531 1 382Project574 1 170Project594 1 125Project636 2 345Project644 1 169Project668 1 191Project676 1 117Project684 1 143Project689 1 108Project690 1 216Project713 1 367Project724 1 127Project729 2 239Project738 1 252Project779 1 115Project791 1 110Project818 2 434Project820 1 222Project830 1 179Project888 3 381Project934 3 461Project939 3 358Project951 1 165Project959 2 351Project962 1 316Project967 1 191Project984 1 117Project997 1 187
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Determine the boundary work done by a gas during an expansion process if the pressure and volume values at various states are measured to be 300 kPa, 1 L; 290 kPa, 1.1 L; 270 kPa, 1.2 L; 250 kPa, 1.4 L; 220 kPa, 1.7 L; and 200 kPa, 2 L
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Which of the following statements is FALSE?a.Dry farming methods replaced the need for windmills.b.The development of the windmill provided new water sources for West Texas farmers.c.Many early farms in West Texas failed due to drought.d.As irrigation methods improved, more land in Texas became profitable for farming,
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A hydraulic jump is induced in an 80 ft wide channel. The water depths on either side of the jump are 1 ft and 10 ft. Please calculate: a) The velocity of the faster moving flow. b) The flow rate (discharge). c) The Froude number of the sub-critical flow. d) The flow energy dissipated in the hydraulic jump (expressed as percentage of the energy prior to the jump). e) The critical depth.
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Which of the following is an example of a reliable source?A. A pamphlet on the economics of bridge building published by the organization Citizens Against Government Spending.B. An article in Environmental Science and Technology, a peer-reviewed journal published by the American Chemical Society.C. A newspaper editorial written by a United States senator.D. A blog post by a university engineering student.
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A insulated vessel s has two compartments separated by a membreane. On one side is 1kg of steam at 400 degC and 200 bar. The other side is evacuated . The membrane ruptures, filling the entire volume. The finial pressure is 100bar. Determine the final temperature of the steam and the volume of the vessel.
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Logical variables: Running late? Complete the tunction RunningLate such that the logical variable on Time is true if no Traffic is true and gasEmpty is false. Ex >> n°Traffic = true ; >> gasEmpty-false; >onTime - Runninglate(noTraffic,gasEmpty) logical Your Function B Save C Reset EE MATLAB Documentation 1 function onTime - RunningLate (noTraffic,gasEmpty) 2 % complete the logical expression to the right of . using the variables n°Traffic and gasEmpty 4 onTime - 6 end Code to call your function C Reset 1 noTraffic true; gasEmpty true; 2 onTime-Runninglate(noTraffic, gasEmpty)
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A conical funnel of half-angle θ = 30 drains through a small hole of diameter d = 6:25 mm at the vertex. The speed of the liquid leaving the funnel is V= √ 2gy where y is the height of the liquid free surface above the hole. The funnel initially is filled to height y0 = 300 mm. Obtain an expression for the time, t, for the funnel to completely drain, and evaluate. Find the time to drain from 300 mm to 150 mm (a change in depth of 150 mm), and from 150 mm to completely empty (also a change in depth of 150 mm). Can you explain the discrepancy in these times?
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(d) Arches NP is known for its spectacular arches that develop in the jointed areas of the park. Placemark Problem 2d flies you to Landscape Arch, the arch with the largest span in Arches NP. If the stresses that stretched the rock to form the joints were oriented perpendicular to the joint surfaces and the rock fins that contain the arches, what was the direction that the rocks were stretched? ☐ N-S ☐ E-W☐ NW-SE ☐ NE-SW
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When circuit switching is used, what is the maximum number of circuit-switched users that can be supported? Explain your answer in your own words.
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A metal crystallizes with a face-centered cubic lattice. The edge of the unit cell is 408 pm. Calculate the number of atoms in the unit cell and diameter of the metal atom.
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