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Explain how you would expect the strength and ductility of a crystalline material to change as the ASTM Grain size number change from 14 to 3.
Evaluate the concentration of vacancies in copper at 650C temperature. What temperature will be needed to heat treat copper such that the concentration of vacancies produced will be 1000 times more than the equilibrium concentration of vacancies at s..
Air at standard temperature and pressure flows through a horizontal galvanized iron pipe at a rate of 4.0 ft3/s. The pressure drop must not exceed 0.75 psi per 100 ft of pipe (and naturally we want to design the most economic pipe). What diameter sho..
What is the composition, in weight percent and atom percent, of an alloy that contains 105.0 kg iron, 20.3 kg of aluminium, and 2.0 kg of copper?
An insulated piston-cylinder assembly containing a fluid has a stirring device operated externally. The piston is frictionless, and the force holding it against the fluid is due to standard atmospheric pressure and a coil spring. The spring constant ..
A piston cylinder device initially contains 0.15-kg steam at 3.5 MPa, superheated by 5 C. Now the steam loses heat to the surroundings and the piston moves down, hitting a set of stops at which point the cylinder contains saturated liquid water. the ..
If have to do a material selection case study for a rice cooker outer body where can I find the necessary requirement specifications of the material?
For a tall column resting on the ground, axial stress develops due to the columns weight. (a) Derive the stress as a function of position z measured from the bottom of the column, and the total contraction of the column.
A system consists of liquid nitrogen in equilibrium with nitrogen vapor. How many phases are present? The system undergoes a process during which all of the liquid is vaporized. Can the system be viewed as a pure substance during the process? Explain..
A thin walled tube with closed ends has an inside radius of 80mm and a wall thickness of 6 mm. It is subjected to an internal pressure of 20 MPa, a torque of 60 kN*m, and an axial compressive force of 200 kN. Determine the maximum normal stress and t..
Two kilograms of Refrigerant 134a, initially at 200 kPa and occupying a volume of 0.11874 m3, undergoes a process at constant pressure until the volume has doubled. Kinetic and potential energy effects are negligible.
a steel bar and an aluminum bar are joined end to end and fixed between two walls. the cross sectional area of the
Calculate the number of vacancies per cubic meter in gold at 900°C. The energy for vacancy formation is 0.98 eV/atom. Furthermore, the density and atomic weight for Au are 18.63 g/cm3 (at 900°C) and 196.9 g/mol, respectively.
a steam power plant implements an ideal reheat rankine cycle. steam enters the inlet of the high-pressure turbine at 8
the electronic components of a computer are cooled by air flowing through a fan mounted at the inlet of the electronics
a material is found to have a tenth-thickness of 2.3 cm for 1.25-mev gamma rays. a what is the linear attenuation
a power plant is analyzed as a simple ideal rankine cycle with a boiler operating at 300 oc. steam leaves the boiler
a small high speed turbine operating on compressed air produces a power output of 100 w. the inlet state is 4 bar 50
hot air at 207 kpa and 200degc enters a 2.5-cm-id tube at 6 ms. the tube is constructed of copper with a thickness of
Water enters a 2 meter diameter pipe at a temperature of 23 deg C. The water leaves the pipe at a temperature of 97 deg C The laminar flow rate is such that the Reynolds number is 800. What is the mass flow rate?
a cross-flow heat exchanger consists of a bundle of 32 tubes in a 0.6-m2 duct. hot water at 150degc and a mean velocity
gas is sampled at atmospheric pressure from the exhaust manifold of an internal combustion engine and analyzed. the
determine the electrical power input to the pump. the density of water is 1kg/l.
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