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Air enters a well-insulated nozzle with a pressure of 1000 kPa, a temperature of 527°C. Determine the exit temperature T2s (K) for the isentropic process.
Write down the total heat transfer rate equation as a function of surface temperature and relevant characteristic dimensionless numbers.
If it takes 17.5 seconds for the dragster to reach 1/10 of its top speed, what is the value of the constant, A. What is the peak magnitude of the acceleration experienced by the driver during the race
Knowing that the tank has an outer diameter of 320 mm and a wall thickness of 3 mm, determine the maximum normal stress and the maximum shearing stress in the tank.
Calculate the following the pressure of carbon dioxide at the surface of the limestone at 1000k. The rate of decomposition of limestone at 1000k (in moles per square meter of surface per second).
For an enlarged control volume that includes the turbine and enough of the surroundings so that the boundary temperature is 90°F, calculate the rate of entropy production (Btu/s-°R).
Show the system of equations in matrix form. Give a numerical solution then make a temperature contour plot and calculate the heat flux.
The total power developed by the turbine is 11,400 kW. Kinetic and potential energy effects can be neglected. Determine the mass flow rate of the steam at each of the two exits, in kg/h.
A steam turbine is limited to a maximum inlet temperature of 800°C. What is the maximum power output per unit mass flow rate?
A solar concentrating heat exchanger system directs sunlight onto a large, straight pipe. Show whether this system violates the second law of thermodynamics.
If instead of being free the rod ends are fixed at room temperature, and then the temperature is raised to 300C, what is the state of stress in the rod at 300C?
The enthalpies of the gas at entry asnd exit are 950 kJ/kg and 650 kJ/kg respectively. If the gas flow rate is 5 kg/s, what is the work output from the turbine?
At the end of the isothermal expansion, the pressure is 600 kPa. Determine the work and heat transfer for each of the four processes.
Radiation from sun is absorbed at the plate surface at the constant rate of 300 W/m2. What will be the average surface temperature of the plate?
Find the critical speed when the trailer is traveling over a road with a profile approximated by a sine wave of amplitude 7.62 cm and wavelength of 14.63 cm. What will be the amplitude of vibration
Determine the entropy production rate as 5.00 lbm/s of saturated water vapor at 14.696 psia is condensed isothermally and aergonically (no work transport) in a steady flow.
Taking the density and the specific heat of the oil to be 950 kg/m^3 and 2.2 kJ/kg*degC, respectively, determine how long the heater is kept on. Assume the room is well sealed so that there are no a
The bungee cord has an unstretched length of 60 ft and has a spring constant k = 14 lb/ft. How far above the river is the jumper when the cord brings him to a stop?
The principal plane stresses and associated strains in a plane at a point are s1 = 36 ksi, s2 = 16 ksi, e1 = 1.02(10^-3), and e2 = 0.180(10^-3).
Oxygen tanks are filled by compressing the oxygen gas as shown. An initially evacuated 1 m3 tank is to be filled to 13,000 kPa. Determine the total work required by the compressor.
Determine the total amount of heat which must be added or removed in the reactor per 100kg of hydrogen produced.
In a certain processing plant, 10,000 kg/h steam is changed from 1 MPa, 400°C, to 0.2 MPa, 200°C. Calculate the maximum amount of electric power (kW) that could be derived.
An energy-conversion efficiency of 75% is claimed. As chief patent officer, would you issue a patent for this engine, and if so, would you invest money in this idea?
Estimate the maximum efficiency of conversion of thermal energy to electric power which could be obtained in such a plant.
Comment on the difference between the exergy destruction values. The process is brought about adiabatically by stirring the mixture with a paddle wheel.