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The pore filling theory of liquid phase sintering predicts that the densification of powder compacts is determined by grain growth. Assuming that the grain growth occurs by diffusion control and all other parameters are invariable:
(a) discuss quantitatively the effect of grain growth rate on densification time, and
(b) plot sintered density versus average grain size trajectories for different grain growth rates with a ratio of 1:2:3.
a rigid high-pressure tank has a volume of 3.8ft3 and containss nitrogen at 185 psia and at 290 f. a small leak
the 500 lbf motor is supported on springs with a total stiffness of 5000 lbfin. the springs have a damping ratio of
two jets of air of equal mass flow rate mix thoroughly before entering a large reservoir. one jet is at 400 k and 100
How would the answer change if the collector were redesigned to focus the incoming solar radiation to enhance the maximum temperatures to 400°C.
a for a rectangular coordinate system we developed the navier stokes equation for vx. now reduce that equation to
Determine the required thickness t of the tube if its outside diameter d is 200 mm and the desired factor of safety with respect to Euler buckling is n = 3.0. (Assume E =72 GPa.)
the concrete beam is reinforced with three 20-mm diameter steel rods. assume that the concrete cannot support tensile
An SKU has an annual demand of 10,000 units, each costing $10, ordering costs are $200 per order, and the cost of carrying inventory is 20%. Calculate the EOQ in units and then convert to dollars.
Explain why adaptors are usually needed when systems are constructed by integrating COTS products. Suggest three practical problems that might arise in writing adaptor software to link two COTS application products.
consider two-dimensionallaminar unidirectional flow between parallel spacing 2hvertical plates. one plate to the left
The uniform 62-kg pole of 150-mm diameter is hinged at A, and its lower end is immersed in fresh water. Determine the tension T in the vertical cable required to maintain C at a depth of 1 m.
Consider a cargo vehicle that will travel back and forth between the moon and LEO that is propelled by an electric propulsion system on a slow spiral trajectory. Assume that the characteristic velocity change (?v) for this mission is ?v=6,800 m/s.
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