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Steam enters a urbine at 25 MPa, 550c and exits at 5 MPa, 325c at a flow rate of 70 kg/s. Determine the total power output of the turbine, its isentropic efficiency and the second law efficiency.
If a convection coefficient of 500 W/m2·K is maintained by circulation of the oil, how long does it take for the centerline of a rod to reach a temperature of 50ºC, at which point it is
Determine the final gauge pressure of the helium given the atmospheric of the place is 102.8kpa. Round the answer to one decimal place.
Determine the following: 1. The compressor work (kJ/kg) 2. The turbine work (kJ/kg) 3. The cycle thermal efficiency 4. The cycle thermal efficiency if an ideal re-generator is employed.
What stresses are produced in the bolt and in the tube if the nut is tightened an additional quarter turn past the snug-tight condition?
What is the indentation diagonal length when a load of 0.75 kg produces a Vickers HV of 510? Calculate the Vickers hardness when a 570-g load yields an indentation diagonal length of 0.035 mm.
A cylindrical bar of steel (E = 209 GPa, or 30 ×106 psi, v = 0.30) 9.6 mm (0.3780 in.) in diameter is to be deformed elastically by application of a force along the bar axis.
Draw a block-diagram of a yaw rate damping system. Include the following components: the airframe, the rudder actuator, the control element, and the pilot.
How many gallons of brine must the plant take in per day? The density of fresh water is 1.000 g/cm3. The density of brine is 1.025 g/cm3.
Water at 300 kPa with a quality of 50% has a temperature raised 20oC in a constant pressure process. What is the new quality (if could be defined) and specific volume?
For the following given states find the reguired region (i.e., phase) or property of water. Given: P= 400kPa, v= 0.001084 m^3 / kg, find region and temperature.
The masses will accelerate, in a direction that depends on which is the larger. A) What is this acceleration, in terms of m1 and m2? B) What is the tension in the rope, in terms of m1 and m2?
A levitation fan has been selected that delivers this pressure at a flowrate of 0.032 m3/s. What is the resulting gap height (in mm)? Assume the density of air is 1.19 kg/m3.
When this happens, the coefficient of friction between wheels and road is .5 N/kg. How long does it take the vehicle to come to a stop, and how far is this?
Determine the total time for the sled to reach the bottom? how long would it take to reach the bottom if the slider gave it a 30 ft/sec sendoff?
Determine the acceleration of the mass center of the disk and the components of the force exerted on the disk by the curved surface when therta=60 degrees.
A normal shock wave exists in Mach 2 stream of air having temperature and pressure of 45°F and 30 psia, respectively. Calculate the Mach number, pressure, and temperature downstream of the shoc
A long flat bar has the S-N diagram. The bar is 6in wide by .5 in thicj. It has a 2 in hole in the middle. What is the max load the bar can carry if loaded one time?
Assume that heat is transfered to the working fluid in the boiler from a reservoir at 1400K and that the fluid ib the condensor rejects heat to the surroundings at 25C. Calculate the power required
Compare the relative properties and cost of three ceramic materials (b) On the basis of this comparison, select the material most suitable for the cookware.
The surroundings are at a constant temperature of 20°C. Determine the change in entropy of the system, the surroundings, and the universe during this process.
Estimate, as closely as possible, the entropy change of the universe. You may assume that argon behaves as an ideal gas. Do you think this expansion process as a whole can be treated as reversible?
Determine: First drawing your schematic and numbering your inlets and outlets. Draw your process for each fluid (water side and bleed steam side) each on a separate T-s diagram.
Pressures change from 325 K and 125 kPa to 500 K and 300 kPa respectively. Find the polytropic exponent n and the mass specific work in the process.
Compute the lift L and drag D experienced by the aircraft as well as the total normal force imposed on the 90-kg pilot by his seat.