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You are to design and produce a 2 inch thick steel wear plate for a rock-crushing unit. To avoid frequent replacement of the wear plate because of cracking or excessive plastic deformation, the hard
An ideal reheat Rankine cycle with water as the working fluid operates the inlet of the high-pressure turbine at 8000 kPa and 450 C; the inlet of the low-pressure turbine at 500 kPa and 500 C; and t
Draw the P-V and T-S diagrams of the cycle and determine (a) p, T and v of the four state points, (b) heat and work quantities for each of the four processes, and (c) the cycle thermal efficiency.
Fine pearlite and a small amount of martensite are found in a quenched 1080 steel. What microstructure would be expected if we had used a low alloy, 0.2% C steel? What microstructure would be expec
The gas may be considered idal at these conditions. Find the final volume and the work for And isothermal process (PC = constant)
Additional heat is added until the pressure reaches 1.2 MPa. How much work is done? What is the final temperature at 1.2 MPa?
A Dam across a river dams up a lake 300 m higher than the river downstream. The electric generators driven by water-powered turbines deliver 1600 MW of power.
The vessel will rupture if the pressure reaches 5 Mpa. What is the initial pressure and quality? What is the temperature in the vessel and the quality just before rupture?
An 8-m long, unisulated square duct of cross sectional 0.2-m x 0.2-m and relative roughness 10^-8 passes through the attic space of a house. Hot air enters the duct at 1 atm and 80 C at a volume flo
Find the specific volume of steam (in m^3/kg) at 2.5 MPa and 283 degrees C. What is the value predicted by the ideal gas law?
Water is to be pumped from a lake to a ranger station on the side of the mountain. Calculate the maximum elevation, z, of the ranger station above the lake if the pipe rises at an angle of 30 degrees.
A steel T-section is to be used under torsion. The cross section shown below has dimension bf=6 in, tf=0.6 in, d=10in, tw=0.5 in. It is subjected to a torque at the centerline of Tx = 1,500 in-lb an
A woman with wieght 637N lies on a bed of nails. the bed has a weight of 735N and a lenght of 1.72m. the bed is held up by 2 supports, one ate the head and the other at the foot.
What is the optimal number of cases to have on hand to minimize expected total costs in a single week? show your calculations.
Why is the Reynolds Number for onest of turbulence given by Re > 2000 in fully flowing pipes, and Re > 500 in partly flowing pipes and onther open channels?
Consider a thermodynamic system executing the two reveraible proceses shown in the sketch (ab and adb). What is the heat transferred to an ideal gas if p2=2pa and v2=2v1? express your answer in ter
An insulated piston-cylinder device contains 5 L of saturated liquid water at a constant pressure of 150 kPa. An electric resistance heater inside the cylinder is now turned on, and 2200 kJ of energ
Determine the highest pressure the liquid water can have at the exit of the pump. Neglect the kinetic and potential energy changes of water, and take the specific volume of water to be 0.001 m3/kg
If the maximum cycle temperature ( at the heater exit ) is 1000 C and the minimum cycle temperature is 100 C ( at the cooler exit ) , what is the theoretical limit of the cycle efficiency?
Find out the coefficients m and b of the function you decided from (1) and plot the original data with this function on the same plot.
Water and steam enter an insulated mixing chamber in steady flow. The liquid water enters at 20 0C and 3 bars with a rate of 100 kg/min. the steam enters at 320 0C and 3 bars. And the mixture leaves
Find temperature at the center of the solid after two minutes. Temperature at the center and temperature at the end of the cylinder.
A static thrust structure is to be designed for a turbofan engine. The following standard engine test conditions are given: intake air velocity: 700 ft/s, exhaust gas velocity: 1640 ft/s, intake cro
Air goes through an adiabatic nozzle. At the inlet, pressure is 15 bar, temperature 700 K, velocity 100 m/s, and cross-sectional area 0.1 m^2.
Determine each of the following Optimal manufacturing run size. Resulting total annual cost for carrying inventory and for production setups.