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Saturated steam at 2 MPa is contained in a piston-cylinder device. The initial volume is 0.25 m3. Determine the quality of the steam at the final state.
A paddle wheel within the cylinder is rotated until 15 kJ of work is done on the air while the pressure is held constant. Determine the final temperature of the air.
Calculate the efficiency if a reheat loop was added at such that the steam leaves at 1 MPa and reenters the turbine at 450C.
Find the power input to the compressor. Suppose on an actual compressor the exit temperatureis found to be 447C. Find the adiabatic efficiencyof this compressor.
Heat is then slowly removed from the nitrogen during a constant pressure process until the temperature of the nitrogen is 300K. Calculate the work done by the nitrogen gas.
Liquid water is cooled at a constant pressure of 200 kPa in a piston-cylinder device from a temperature of 110 °C to a temperature of 30 °C. Determine the change in entropy.
The oil is contained in a well-insulated cylindrical tank that has a diameter of 1 m and a height of 1 m. What is the total entropy change (kJ/K) for the system comprising of steel and oil?
Calculate work per unit mass by incorporating an Ideal (polytropic, n=1.35) two stage compression process. Calculate the work per unit mass with isentropic,single stage compression.
The total mass of the car and its water "fuel" will be 5 kg. If you want the car to achieve a maximum speed of 3 m/s, what part of the total mass must be water?
Liquid water is cooled at a constant pressure of 200 kPa in a piston-cylinder device from a temperature of 110 °C to a temperature of 30 °C. Find the work done during the process, in kJ/kg.
Air at 80 kPa, 300 K, and 250 m/s enters a diffuser at a rate of 2.5 kg/s and leaves at 315 K. The exit area of the diffuser is 400 cm^2.
If the temperature of the inner and outer surfaces of the bottom of the pan are 104oC and 106o, determine the rate of entropy generation within the bottom of the pan.
Analyze for phases present at 100 degrees above the reaction temperature, for their compositions and amounts in the steel.
Carnot refrigerator which removes heat from a cooled space at -20C at a rate of 320 kJ/min and rejects it to the same environment at 300 K. Determine the net work supplied to the refrigerator.
SAE Grade Number 7 bolts are used, bearing strength of plate = 60000psi and the thickness of the plate is 3/8 of an inch. For a factor of safety of 3, what diameter standard bolt should be used?
Compare the two alternatives based on engineering and economic reasoning and make a justifiable recommendation for the selection of an alternative.
The collar is at rest at point A and is gently displaced gently to the left, determine the spring's unstretched length if the collar reaches point B at a speed of 14 ft/s.
If the plate moves through the mid plane between the surfaces, the force, F required to maintain this motion is? Assume the velocity distribution in the oil is linear.
A white cast iron has 25% proeutectoid Fe3C in its microstructure. How much eutectoid Fe3C will be formed after the eutectoid reaction?
Water enters at 140°C and 20 MPa and leaves at 600°C and 20 MPa. Determine the ratio of the outlet area to the inlet area if the velocity is constant through the duct.
The measured heat loss from the turbine is 300 BTU/s. Neglect changes in kinetic and potential energy. Determine the requried mass flow rate in (lbm/s).
The discharge temperature is 400 C. A heat loss of 1.0 kw is measured. Neglect changes in kinetic and potential energy. Determine the power input (kw) to the compressor.
What is the propeller rotation rate in rpm? What is the propeller shaft torque? What is the torque if the turbine above has two instead of three blades?
Pressure ratio = 9.2 Air at compressor inlet is at 25 deg F Air at turbine inlet is at 1600 deg F Find the gas temperatures at the compressor and turbine outlets Find the back work ratio Find the t
Find the velocity with which particle B begins to move. If thr coefficient of friction between B and the table is 0.20, find the speed with which B leaves the table.