Engineering

An ideal gas within a piston-cylinder assembly undergoes a Carnot refrigeration cycle. The isothermal compression occurs at 325 K from 2 bar to 4 bar. The isothermal expansion occurs at 250 K. Determine: a. the coefficient of performanceb. the heat transfer to the gas during the isothermal expansion, in kj per kmol of gasc. the magintude of the net work input, in kj per kmol of gas.
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What is the dimensionless heat conduction rate for a sphere at surface temperature T1 buried in an infinite medium of temperature T2?a. 2*D.b. 2.34*D.c. Pi*D.d. 5.93*D.
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Strands of materials A and B are placed under a tensile force of 10 Newtons. Material A deforms more than Material B.True or false: This behavior may indicate that the bonds in Material B are stronger than the bonds in Material A. True False
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At a certain section in a pipeline, a reducer is used to reduce the diameter from 2D gradually to diameter D. When an incompressible fluid flows through this pipeline, the velocity is U1 in the first section and U2 in the second section. Which of the following is a true conclusion?a. U2 = 4U1 b. U2 = 2U1c. U2 = U1/2d. U2 = U1/4
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A steam turbine takes in steam at a temperature of 400 Celsius and releases steam to the condenser at a temperature of 120 Celsius. If the turbine takes 500 kJ of heat in each cycle, what is the maximum amount of work that could be generated by the turbine in each cycle
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The simply supported beam in the Figure has a rectangular cross-section 150 mm wide and 240 mm high.(1) Compute the maximum bending stress in the beam.(2) Sketch the bending stress distribution over the cross-section on which the maximum bending stress occurs.(3) Compute the bending stress at a point on section B that is 35 mm below the top of the beam.
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Apart from the type of emergency, what factors affect the decision on weather to evacuate or shelter in place?
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A rod that was originally 100-cm-long experiences a strain of 82%. What is the new length of the rod?122 cm182 cm82 cm22 cm108.2 cm
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the integral of In3x/
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In heavy traffic areas you should wave pedestrians across the street if there is no crosswalk
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A investor will invest in mutual fundwith a probability of 0.6, will invest in government fundwith a probability of 0.3, and will invest in both fundswith a probability of 0.15. Find the probability that the investor will invest in either mutual fundor government fund.
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zener shunt regulator employs a 9.1-V zener diode for which VZ = 9.1 V at IZ = 9 mA, with rz = 40 and IZK= 0.5 mA. The available supply voltage of 15 V can varyas much as 10%. For this diode, what is the value of VZ0?For a nominal load resistance RL of 1 k and a nominal zenercurrent of 10 mA,what current must flow in the supply resistorR? For the nominal value of supply voltage, select a valuefor resistor R, specified to one significant digit, to provideat least that current. What nominal output voltage results?For a 10% change in the supply voltage, what variationin output voltage results? If the load current is reduced by50%, what increase in VO results? What is the smallest valueof load resistance that can be tolerated while maintainingregulation when the supply voltage is low? What is the lowestpossible output voltage that results? Calculate values for theline regulation and for the load regulation for this circuit usingthe numerical results obtained in this problem.
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hi do you know any websites for making 3d projects for freethank u. plz if you don't have an answer then don't answer and take the points I really need the information
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Which of the following is a possible unit of ultimate tensile strength?Pascal per square meter (Pa/m2)Gram per cubic centimeter (g/cm3)Newton per square meter (N/m2)Kilogram-meter per second (kg m/s)No units2 points QUESTION 8Select the definition that best describes the term ultimate tensile strength.The stress at which a material begins necking.A measure of the degree of plastic deformation that a material can withstand before failure.The stress at which a material transitions from elastic to plastic deformation.The maximum stress a material experiences before failure.Indication of how much energy a material can absorb before failure.
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If you are traveling over 50 miles per hour, then you should signal at least this far before your turn
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A moving-coil instrument, which gives full-scale deflection with 0.015 A has a copper coil having resistance of 1.5 Ohm at 15C and a temperature coefficient of 1/234.5 at 0 degree C in series with a swamp resistance 3.5 Ohm having a negligible temperature coefficient. Determine the resistance of shunt required for a full-scale deflection of 20 A and the resistant required for a full-scale deflection of 250 V. If the instrument reads correctly at 15C, determine the percentage error in each case when the temperature is 25C.
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A force measuring instrument comes with a certificate of calibration that identifies two instrument errors and assigns each an uncertainty at 95% confidence over its range. Provide an estimate of the instrument design-stage uncertainty. Resolution: 0.25 N Range: 0 to 100 N Linearity error: within 0.20 N over range Hysteresis error: within 0.30 N over range
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Please help me:Use the Node analysis to find the power of all resistors
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Air enters a diffuser operating at steady state at 540R, 15 lbf/in.2, with a velocity of 600 ft/s, and exits with a velocity of 60 ft/s. The ratio of the exit area to the inlet area is 8. Assume that The air is the ideal gas model for the air and ignoring heat transfer, determine
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Which of the following would make a column more likely to buckle?Increase its ultimate compressive strengthIncrease its lengthIncrease its Youngs modulusIncrease its cross-sectional areaIncrease its area moment of inertiaTrue or false: Increasing a materials ultimate compressive strength makes it less likely to crush under its own weight (assuming all other things equal). True FalseTrue or false: The area moment of inertia of an object only depends on its shape, not its size. True False
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For an applied transformer with a primary winding of 220, a secondary winding of 113 turns, a core of 45 cm2 cross-section and a rated supply voltage of 220 V, frequency f = 50 Hz, number system Core style K = 1,2.one. Calculated from the sensor in the core transformer.NS. Calculate the rated capacity of the transformer application.C. Calculating no-load voltage and current levels.NS. If the power point is reduced by 7% from the voltage level; voltage scortation feature.e. If use the core machine variable on random form; powerpress same as the host variable on; compare the capacity of the random transformer with the capacity of the transformer application.
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Block A hangs by a cord from spring balance D and is submerged in a liquid C contained in beaker B. The mass of the beaker is 1.20 kg; the mass of the liquid is 1.85 kg. Balance D reads 3.10 kg and balance E reads 7.50 kg. The volume of block A is 4.15 103 m3.a) What is the density of the liquid?b) What will the balance D read if block A is pulled up out of the liquid?c) What will the balance E read if block A is pulled up out of the liquid?
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If an elevator repairer observes that cables begin to fray after 15 years, what process might he or she use to create a maintenance schedule for their replacement? fallacious reasoning reductive reasoning inductive reasoning deductive reasoning
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Con qu otros organismos o autoridades trabaja Defensa Civil? (nombra cinco)es de dpcc
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