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Determine for the cycle the rate of heat transfer to the working fluid passing through the steam generator, in kJ per kg of steam entering the first stage turbine.
If the quality at the exit of the second turbine is 90%, determine pressure and quality or temperature of steam exits the first-stage turbine and the cycle thermal efficiency.
Water is the working fluid in an ideal Rankine cycle. Superheated vapor enters the turbine at 10 MPa, 4800C, and the condenser pressure is 6 kPa. Determine for the cycle the thermal efficiency.
What is the optimal number of machines that can be assigned to the operator to produce the widget at low cost? Draw work machine chart.
If the correction is not made, at what car speed will resonant vibration of the wheel occur? What would the amplitude of the motion be when the car's speed is 130 km/h?
The unit cells of several orthorhombic crystals are described below. What is the Bravais lattice of each and how do you know?
The wear out of a machine is normally distributed with 90 percent of the failures occurring between 200 and 270 hr of use. Find the MTTF and the standard deviation of failure times.
1.41 kg steel part whose temperature is 1000oC is dropped into an open, insulated vat containing 35.4 kg of water whose temperature is 15oC.
A peripheral milling operation is performed on the top of a rectangular workpiece that is 650 mm long. Determine the time needed to make one pass across the surface, (b) the maximum material removal
The water is heated to 160°C at constant volume and is then expanded isothermally to saturated vapor. Determine the total heat transfer for the process, in kJ.
Derive the differential equation to find the mole fraction of A in the cylinder as a function of radial position. Solve the differential equation to find the mole fraction of A as a function of posi
Determine (a) the final temperature, in Farenheit, and final pressure, in lbf/in^2, and (b) the work and heat transfer, each in btu/lb.
At the end of the compression stroke the air is at 800 K and 4280 kPa absolute. What is the work done by the piston on the air during the compression stroke?
Consider a piston-cylinder assembly containing 0.14 kg of air initially at a pressure of 350 kPa. Sketch the process on a P-V diagram and calculate the amount of heat added during the process.
A major automotive company is considering an agreement with a small manufacturer. What cost-of-capital rate makes the royalty and lump sum payment alternatives equally acceptable?
A freshwater jet boat takes in water through side vents and ejects it through a nozzle of diameter D=75 mm. What speed V will be produced if the jet speed is increased to Vj= 25 m/s?
A closed system undergoes a cycle consisting of two processes. During the first process, 40 Btu of heat is transferred to the system while the system does 60 Btu of work.
Calculate the pressure drop for each fluid. Use schedule-40 wrought steel pipe in standard dimensions for both the inner and outer pipes. Use hydraulic diameter to analyze the annular flow.
Determine (a) the finite difference equations and (b) the nodal temperatures. The mesh contains 10 interior nodes, which are the nodes of interest when determining finite difference equations and no
You must put this on a 10.1 cm diameter axel. What temperature must the wheel be heated to? The linear thermal expansion coefficient for steel is 12*10^-6 degrees C^-1.
A 55 horsepower 1800 rpm electric motor is connected to a speed reducer with a ratio of 17:1. What is torque available at the output of the reducer for which the system must be designed?
What is the minimum coefficient of friction necessary between the tires and the ramp surface so that the vehicle does not slide down the ramp?
A velocity profile for fully developed laminar flow in a circular tube as u=umax [1-(r/R)^2]. obtain an expression for shear force per unit volume in the x direction for this flow?
A campaign sign weighing 68 pounds is suspended from the middle of a cable stretched across a street between two buildings.
Consider a piston-cylinder assembly containing 0.14 kg of air initially at a pressure of 350 kPa.Sketch the process on a P-V diagram and calculate the amount of heat added during the process.