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1. water and air are separated by a plane wall. it is proposed to increase the heat transfer rate by adding adding straight rectangular fins to the wall. the fins have 1.27 mm thickness and 3.0 cm length. the fins are spaced 1.27 cm apart from each other. the air-side and water-side heat transfer coefficients are assumed constant and have the values 11.4 w/(m2 k) and 256 w/(m2 k), respectively. the thermal conductivity of the fins is 42.9 w/(m k). you may assume the steel wall is so thin that any resistance to conduction it produces is negligible. determine the percent change in total heat transfer when the fins are placed on (i) the water side, (ii) the air side, and (iii) both sides. briefly explain why it is more effective to have the fins on the air side.
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Create a function called theme_by_year that takes as input a year (as an integer) and shows the theme ids and theme names (listed in order by theme id) that were in sets that year.The column names must be id and name_themes (to differentiate between the name of a theme and the name of a set) in that order.The index should be reset and go from 0 to n-1.Each theme should only be listed once even if it appeared in more than one set from that year -- duplicate themes should be based on theme id and not name since there are some themes with the same name but with a different id.We were supposed to merge the inventory_sets, sets, and theme data which is mainly what I was having the issue with with no duplicates for id
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A processor has a 4294967296-byte data memory and a single 131072-line data cache. The cache is a 1-way set associative cache with lines that are 256 bytes in size. When the instruction lb $8,0($4) is executed, CPU register $4 contains the address of final byte within memory block 2928610. All numbers listed above are decimal.a) (4) Show the 8-digit hex address contained in register $4.b) (6) Write down a sequence of at most two MIPS true-op instructions that place into register $6 the line number of the cache line into which the memory block is loaded.
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Given the following codenamespace globalType{void printResult();}which of the following statements is needed to access printResult?a. globalType.printResult(): b. globalType:: printResult: c. globalType.printResults(): d. globalType: printResult():
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34. A technique to improve accuracy when entering data in a worksheet by controlling the type of data or the values that can be entered is called A) Goal Seek B) Data validation C) Data protection D) What-If Analysis
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Compute for the force exerted at the smooth surface at A and B if the tensile force in the bolt GH is 300 N and the clamp is to hold the smooth strut S in place.. (Tensile force in the bolt GH indicates the lift force acting on G forwarding to H)
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evaluate the organizational tools and scrum-agile principles that helped your team be successful. be sure to reference the scrum events in relation to the effectiveness of the tools.
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you are your company's active directory system administrator. the company has branch offices in several countries, including mexico, argentina, canada, and the uk. the company only has a total of 250 employees organized in the same departments in each office. however, the company is projected to expand rapidly in the next two years. you want to create a tree of organizational units (ous) that can adapt to the rapid growth without re-organizing the ou structure in the near future. you also want to be able to easily assign rights to certain network resources based on departmental organizational roles. which of the following solutions would best meet your requirements?
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Diagram (Fig. 8) below are the Miller-Larson diagram of two nickel based super alloys, M9516 (top) and IN738LC (bottom). Note: Along the vertical axis (stress), consider the 8 minor sticks (shorter maker) between the two marked major sticks (longer marker) are linearly distributed When both materials are under a load of 272.2 MPa, what is the rupture time of the M951G alloy if they are working under 727 C? M951G Stress (MPa) 25.4 25.6 25.8 26.0 26.2 26.4 26.6 26.8 103 T(20+logtr)K-h 1.14.4 day l. 180.9 day C . 180.9 year IV. 14.4 year
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1. Consider this prototype for a template function:template void foo(Item x);Which is the right way to call the foo function with an integer argument i?a) foo( i );b)foo( i );c)foo( i );d)foo( i );e)foo( i );2. Which of the following uses the balanced binary search tree to implement?a)STL vectorb)STL mapc)STL priority queued)STL queuePlease explain. TKS
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Ball B, of mass mb, is suspended from a cord of length l attached to a cart A, of mass ma, which can roll freely on a frictionless horizontal tract. Assuming that cart A is given an initial horizontal velocity v0 while ball B is at rest, determine:a) The velocity of B as it reaches its maximum elevationb) the maximum vertical distance h through which B will rise. ( It is assumed that2gl )
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older fuel injection systems (multiport or gang-fired systems) were capable of providing an air-fuel mixture within an accuracy of about % of stoichiometric
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consider two different wings designed with different airfoil shapes. both have rectangular planforms but wing 1 has a chord of 1m and a span of 16m while wing2 has a chord of 2m and a span of 15m. assume the flight speed is 55.88m/s and the air density is 1.112kg/m3. at this flight condition, wing1 generates 41667n of lift force, while wing 2 generates 50284n of lift. which wing do you think is more efficient? why? hint: think of how well each wing makes use of the available dynamic pressure to produce lift.
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a new four lane state highway (posted speed limit 45 mph) is planned and you as the engineer are responsible for developing cross sections. draw a typical cross section, while keeping in mind that there is only 74 feet of r.o.w. the entire 74 feet of r.o.w. must be used. there is a requirement of a concrete barrier in the median. highway design standards should be implemented. what is the width of the median in this cross section? answer should be in feet.
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these engineers analyze the process of mass-producing a product. they are responsible for plant layout, material handling, scheduling, quality control, reliability control, and cost production optimization.
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in physics and mechanics, torque is the rotational equivalent of linear force. it represents the capability of a force to produce change in the rotational motion of the body. torque is a measure of the force that can cause an object to rotate about an axis. just as force is what causes an object to accelerate in linear kinematics, torque is what causes an object to acquire angular acceleration.
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Which of the following statements is a reasonable explanation for why unsaturated fatty acids help keep a membrane more fluid at lower temperatures?a) The double bonds form kinks in the fatty acid tails, preventing adjacent lipids from packing tightly.b) Unsaturated fatty acids have a higher cholesterol content, which prevents adjacent lipids from packing tightly.c) Unsaturated fatty acids are more nonpolar than saturated fatty acids.d) The double bonds block interaction among the hydrophilic head groups of the lipids
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Inconel 625 is a high temperature, corrosion resistant nickel alloy that is often used in components in nuclear fuel assemblies. Treating the alloy as simply elemental nickel, determine the atomic displacements per atom (dpa) over a 3 year period of exposure using the Kinchin-Pease model assuming Monoenergetic 2 MeV neutrons Flux constant over the entire period at 2.5 x 1014 n/cm2 s Isotropic elastic scattering with cross-section\sigma= 3 barns Elastic scattering threshold of 40 ev
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Assume that n is a positive integer.for i: = 1 to 2ns := 0for j := 1 to i 1s := s + j (i j + 1)next jr := s2next i(a)Compute the actual number of elementary operations (additions, subtractions, multiplications, divisions, and comparisons) that are performed when the algorithm segment is executed. For simplicity, however, count only comparisons that occur within if-then statements; ignore those implied by for-next loops.________ operations
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A safety zone is a specially marked area for passengers to get on or off of buses or trolleys. You may not drive through a safety zone:When a bus or trolley is present.When a bus or trolley is unloading passengers.At any time for any reason.
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Based on the result you observed in stop, what voltage wo across an open (blown) fuse? erved in step 9, what voltage would you expect in a 120 V circuit 4 Use Kirchhoff's voltage law to find Vy in Figure 7-5: VE? w Figure 7-5 5 A 10 (a) resistor is in series with a bulb and a 12 V source. 178.0 V is across the bulb, what voltage is across the resistor? (b) What is the current in the circuit? (c) What is the resistance of the bulb?
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Experiments on flow through an orifice plate of diameter d mounted in a length of pipe of diameter D show that the pressure drop is a function of the orifice diameter, pipe diameter, fluid velocity, and fluid density and viscosity. Determine the dimensionless parameters that represent this situation.
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determine the moment of inertia of the cross-sectional area of the beam about the centroidal x axis.
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engine operating modes are being discussed. technician a says that when the engine is in closed-loop mode, the pcm monitors sensor inputs, then adjusts the timing, air fuel ratio, and emission controls. technician b says the system will switch into open loop when the throttle is fully opened or the oxygen sensors cool down during idle. who is correct?
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