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Consider two parallel edge dislocations of the same sign. Let θ be the angle between the line connecting the two dislocations and the direction of their Burgers vectors.
(a) Calculate the variation of the glide force and the climb force for the two dislocations as a function of the relative positions of the dislocations (i.e. as a function of θ).
(b) Which of the following configurations is more stable and why? Configuration A: The two dislocations align themselves one below the other along a direction normal to their slip planes. Configuration B: The two dislocations align themselves one beside the other along a direction normal to their slip planes.
(c) Give examples of at least two practical situations where the more stable configuration in part (b) is observed.
(d) Repeat part (a) for the situation where the two parallel edge dislocations are of opposite sign.
A campus has 5000 students. After the Christmas break one student returns carrying a flu virus. Assume that the rate at which the virus spreads is proportional to the number of infected students P(t),
An experiment was conducted to determine the hydraulic conductivity of an artesian aquifer. The piezometric heads at two points 150m apart were found to be 55 m and 48.5 m above a datum.
A solid steel shaft with an outside diameter of 65 mm is subjected to a pure torque of 7,000 N-m. The shear modulus of the steel is G=80 GPa. Determine a. 1 The maximum shear stress in the shaft
Rope segment BC creates an angle of phi2 = 74.0^\circ with the floor and rope segment CD creates an angle theta with the horizontal. If both ropes BCA and CD can support a maximum tensile force T3 = 130 lb,
Compact fluorescent light (CFL) bulbs have been avaiable for years; they are bery efficient but a little pricey. A CFL bulb that puts out as much light as a 60-W incandescent bulb might costs $10, compared to about $1 for the incandescent bulb. But C..
Let the initial temperature vary from 150 to 250°C. Plot the final results against the initial temperature, and discuss the results.
A perfectly mixed aeration pond with no recycle (return line) serves as the biological reactor for a small community. The pond receives 30 cubic meters/day of influent with a BOD5 of 350 mg/L that must be reduced to 20 mg/L before discharge.
Rhodium has an atomic radius of 0.1345nm and a density of 12.41g/cm^3. determine whether it has an FCC or BCC crystal structure.
Determine the moment of inertia of the cone with respect to a vertical y axis that passes through the cone's center of mass. What is the moment of inertia about a parallel axis y' that passes through the diameter of the base of the cone? The cone ..
The volume of the first pond is 5.0 million gallons, and the second pond is 3.0 million gallons. Assuming complete mixing within each pond, find the BOD concentration leaving each pond
determine the mass flow rate of air through the nozzle. Take the ambient conditions to be 265 K and 85 kPa.
An electronic chip internally generates 1.5 Watts of heat energy that must be dissipated to ensure its reliable operation. A fan, with an exposed area of 10cm^2 is attached to the chip so the heat can be transferred away by convection.
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