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The partition is now removed, the water expands to fill the entire tank. Determine the final temperature and volume of the tank for a final pressure of 10 kPa.
The fraction of liquid and vapor is such that when heated the steam will pass through the critical point. Calculate the heat transfer when the steam is heated from the initial state at 14.7 lbf/in2
The mean velocity of the steam through the duct is 40 m/s. Determine the flow work required to push the steam into the duct.
Determine the work (kJ) performed by the piston on the ambient environment. Neglect the cross-sectional area of the connecting rod.
Calculate the quality of the steam in the pipe and (b) Is there a limit to the steam quality that can be measured using such a device?
The thickness of each wall is 5mm. For aluminum let E =70 GPa and v = 0.33. Determine the average shear stress in each wall and the angle of twist per unit length.
Calculate the steady-state creep rate (in hr-1) if the bar has a tensile stress of (4.6x10^1) MPa at (2.45x10^2) oC. Assume that the activation energy for creep is 140 kJ/mol.
Determine the entropy change of the wood and the oil. Use properties of engine oil for the oil, and neglect the fact that oil will soak into the wood.
On a summer day when the temperature is 80 degrees F, a trash fire emits 30,000 Btu to the atmosphere.By how much has the entropy of the atmosphere increased?
There is also a heat loss per unit mass of 5 kJ/kg. Kinetic and potential energy effects are negligible. What is the mass flow rate through the compressor?
What is the total flow rate in each pipe? What is the average velocity in each pipe? What is the mass velocity in each pipe?
A 1500kg car traveling at 16m/s suddenly runs out of gas while approaching the valley. What will be the car's speed as it coasts into the gas station on the other side of the valley?
What is the ratio of the final kinetic energy to the initial kinetic energy of the system (the two atoms)? In other words, what is KEfinal / KEinitial in this collision?
Taking the surface tension of soap solution to be 0.0027 lbf/ft. Determine the work input required to inflate the bubble to a diameter of 3.2 inj.
2 kg of stainless steel (aka "Iron, 304") is forged at 1150 C, and then cooled by immersing the steel in 5 kg of water at atmospheric pressure and 20 C.What is the change in total entropy.
Develop a double pipe heat exchanger, specifying velocities, mass flowrates, length and inlet and outlet temperatures. Also calculate the pressure drop for each fluid.
A reactor that has a thermal efficiency of 32% is rated at 900 MWe. If the reactor operated at 80% full power for 400 days, what is the decay heat (in MW) 120 s after shutdown?
Natural boron has a density of 0.128×1024 at/cm3 and a cross section sigma a = 760 b and sigma s = 4 b at an energy of E = 0.025 eV.
Assume 200 MeV is released per fission, the 235U fission cross section is 470 b, and the atomic weight of the uranium fuel is 238 g/mol. What is the value of the core average neutron flux in n/cm2-s?
Assume 200 MeV is released per fission, the 235U fission cross section is 470 b, and the atomic weight of the uranium fuel is 238 g/mol. What is the core average fission rate of the reactor in fission
The 235U fission cross section is 470 b, and the atomic weight of the uranium fuel is 238 g/mol. What is the number density (atoms/m3) of 235U in the reactor?
What must the RHR coolant flow rate be in gpm (gallons per minute) to ensure the removal of 3.0×109 J of decay heat in 10 minutes.
If the tire is filled with air and the final pressure after heating to 100F is actually 32 psi, calculate the change in entropy per unit mass.
One pound mass of air is contained in a piston-cylinder assembly that executes a Carnot power cycle. Determine the heat transfer to the air during the isothermal expansion (BTU).
Allowing a 5oC temperature difference between the external reservoirs and the air when appropriate, calculate the specific heat added to the cycle and its net specific work.