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At a grain diameter of 8 x 10-3 mm, the yield point increases to 260 MPa (37,500 psi). At what grain diameter will the lower yield point be 205 MPa (30,000 psi)?
Steam enters a well-insulated turbine operating at steady state with negligible velocity at 4 MPa, 320C. The steam expands to an exit pressure of 0.07 MPa and a velocity of 90 m/s. The diameter of t
The combine turbine-generator efficiency 80 percent. Disregarding the minor losses because large length-to-diameter ratio, determine the electric power output of this plant.
A steady flow of liquid ethylene glycol inside finned tubing is cooled from an inlet state of 85C and 2000kPa to an exit state of 75 C and 200 kPa by air steadily blown over the tubes by a 8 kW elec
A water-cooler/ice-maker operates at steady-state producing chilled water at 5 C and ice at -10 C from tap water at 20C. The unit is supplied with a steady-flow of .06 kg/s of liquid R-134a at 20 C.
If it has to be operated in 300°F maximum with fully reversed torsion, determine the correct fatigue strength at 2*10^7 cycles?
Determine P2, V2, and T2 for the trapped air in the final equilibrium state, the work and heat transfer experienced by the air, and the final difference in height of the two legs of the manometer.
Find max stress sigma_theta. The cylinder is hollow in the center, one layer of steel inside and a layer of brass outside. a is radius of hollow portion.
Explain the operating principles and discuss the significant energy transfer and environmental impacts for nuclear power plant and automobile air conditioning uniat?
Air enters the compressor at 98 kPa and 295 K at a rate of 10 kg/s and exits at 1 MPa and 620 K. Determine the excess power produced by the generator that can be used for other purposes.
A person weighs 180lbs at sea level. the radius of the earth is 3960 mi. what force is exerted on the person by the gravitational attraction of the earth if he is in a space station in near-earth o
Calculate the smallest size of a surface crack (in mm) that will lead to catastrophic failure at an applied stress of 0.45 times the yield stress. Assume that the dimensionless parameter Y = 1.0.
Consider a metal single crystal oriented such that the normal to the slip plane and the slip direction are at angles of 43.1 degrees and 47.9 degrees, respectively , with the tensile axis.
Calculate the thermal efficiency (%) of the cycle using work and heat transfer. Check that the value matches the Carnot efficiency.
To understand the physics of the O-ring, we may need to start formulating the problem in a static equilibrium condition.Obtain these: The static forces: F1, F2, F3 and in the x1, x2 and x3 directions.
An automobile is modeled as a single-degree-of-freedom system vibrating in the vertical direction. It is driven along a road whose elevation varies sinusoidally.
A piston and cylinder machine containing a fluid system has a stirring device in the cylinder the piston is frictionless, and is held down against the fluid due to the atmospheric pressure of 101.32
An Otto cycle has the lowest T as 520 R and the lowest P as 12 psi. The highest T is 4500 R and combustion adds 500 Btu/lbm as heat transfer. Find the compression ratio and the mean effectivepressur
An olive is at the bottom of a glass of alcohol (n = 1.36), 5.37 cm beneath the surface. Above the alcohol is air. To a person in the air, who is directly above the olive, what is the apparent dept
A tennis racket hits a tennis ball with a force of F=at-bt^2, where A_1 = 1280 N/ms, B_1 = 460 N/ms^2, and t is the time (in milliseconds). The ball is in contact with the racket for 2.85 ms
A high-strength steel [E = 174 GPa] tube having an outside diameter of 60 mm and a wall thickness of 4.5 mm is bent into a circular curve having a 51-m radius of curvature. Determine the maximum ma
A balanced wheel supported on springs is rotating at 1200 rpm. If a bolt weighing 15 g and located 5 cm from center suddenly comes loose and flies off.
Refrigerant 134a is compressed at steady state from 2.4 bar, 0oC, to 12 bar, 50oC. Refrigerant enters the compressor with a volumetric flow rate of 0.38 m3/min, and the power input to the compressor
Calculate the fiber weight fraction, the fiber volume fraction, and the density of the composite sample. Assume Pf = 2.54g/ml, and Pm = 1.25g/ml.