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A turbine disk made from a Ni-base superalloy will be operating at
1350F. The creep data are given below. Determine the maximum stress allowable if
the design criterion requires less than 1% strain in 10,000 hours.
superheated vapor is flowing at a rate of 1.08x 106 gramshour inside a pipe with 0.05 m in diameter and 1x104 cm in
A heat pump with a coefficient of performance of 3.8 provides energy at an average rate of 75,000 kJ/h to maintain a building at 21oC on a day when the outside temperature is 0oC. If electricity costs 8 cents per kW. h. Determine the electric power r..
consider two very large parallel plates. the bottom plate is warmer than the top plate which is held at a constant
Check the applicability of the ideal gas model for- Water at 600 Fahrenheit and pressures of 900 lbf/in^2 and 100 lbf/in^2. Nitrogen at -20 Celsius and pressures of 75 bar and 1 bar
Why is it impossible to infer the emergent properties of a complex system from the properties of the system components?
You are asked to measure the rate at which waste gases are being discharged from a stack. The gases entering contain 2.1 % carbon dioxide. Pure carbon dioxide is introduced into the bottom.
the range of human hearing extends from approximately 20 hz to 20000 hz.a find the wavelength for 30 hz at a
Determine the location the centroid of the area.
Calculate average velocity of the water leaving the disks. Also, calculate the average velocity of the water between the disks at a position where the radius of the disks is 10 cm.
air expands in a piston-cylinder device with a polytropic exponent of 1.3. the initial pressure and temperature were
Consider a germanium wafer which has been doped with antimony to become extrinsically semiconducting at room temperature. What type of semiconductor is antimony doped germanium? What are the majority (or dominant) charge carriers in this material nea..
a carnot heat engine receives 90 kj from a reservoir at 627 . it rejects heat to the environment at 27 . one-fifth of
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