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1. In Figure 9.38 is shown the pressure- temperature phase diagram for H2O. Apply the Gibbs phase rule at points A, B, and C; that is, specify the number of degrees of freedom at each of the points-that is, the number of ex- ternally controllable variables that need be specified to completely define the system.
The Iron-Iron Carbide (Fe-Fe3C) Phase Diagram Development of Microstructure in
Iron-Carbon Alloys
2. Compute the mass fractions of a ferrite and cementite in pearlite.
3. (a) What is the distinction between hypoeutectoid and hypereutectoid steels?
(b) In a hypoeutectoid steel, both eutectoid and proeutectoid ferrite exist. Explain the dif- ference between them. What will be the carbon concentration in each?
A piston-cylinder device contains 12 kg of saturated R-134a vapor at 3.2 bar. An electric source supplies 8 A current to a resistor within the cylinder for 4 minutes and there is heat transfer of 400 kJ to the system. During these energy interactions..
Saturated R- 134a vapor enters a compressor at 68F. At compressor exit, the specific entropy is the same as that at the inlet, and the pressure is 80 psia. Determine the R- 134a exit temperature and the change in the enthalpy of R- 134a.
Find the end pressure with the given information.
the driveshaft of a buildings air-handling fan is turned at 300 rpm by a belt running on a 0.3- m-diameter pulley. the
Hydrogen is contained in a piston-cylinder device at 14.7 psia and 15 ft 3. At this state, a linear spring ( ) with a spring constant of 15,000 lbf/ft is touching the piston but exerts no force on it. The atmospheric pressure acting on the piston i..
The refrigerant R-410a is contained in a piston-cylinder device, as shown in the figure, where the volume is 13 L when the piston hits the stops. The initial state of the fluid is -30 °C, 150 kPa, with a volume of 10 L. The entire system is brought ..
Using the average daily arrival rates for the months of January through June 2012, a simple linear regression model for the data documenting public transportation usage. The single causal factor considered was a linear trend. The resulting regression..
the effort required to maintain a scanning electron microscope is known to increase by a fixed percentage each year. a
The board is used to hold the end of a four-way lug wrench in position. A torque of 40 N.m about the x-axis is required to tighten the nut. You decided to step at the end of the wrench in order to turn it. Assume that the force provided by your foot ..
A 500-ml glass of chilled water at 100C degree is removed from a refrigerator. It slowly equilibrates to the room temperature of 250C degree. Calculate the entropy change of the water, the entropy change of the surroundings, and the entropy change of..
a pistoncylinder contains water with quality 75 at 200 kpa. slow expansion is performed while there is heat transfer
steam enters the first-stage turbine shown in fig. 2 at 40 bar and 500degc with a volumetric flownbsprate of 90 m3min.
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