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Consider a system where densification occurs by lattice diffusion and grain growth by surface diffusion.
(a) Describe how the activation energy of diffusion can be obtained from diffusivity data.
(b) Determine a desirable sintering cycle (T vs. t) to enhance densification while minimizing grain growth.
amonia as a refrigerant enters the expansion valve at a pressure of 1.5 mpa and a temperature of 32 oc its pressure on
a rigid tank is divided into two equal parts by a partition. one part of the tank contains 2.5 kg of compressed liquid
determine the magnitude of the initial velocity of the bullet and the magnitude of the force exerted by the bullet on the block.
certain system is able to exert an external force f according to the relationship.v velocityf 15000-500vn for v lt
Find the rms value of each of the following periodic currents:
Consider the counterflow, concentric tube heat exchanger of Example 11.1. The designer wishes to consider the effect of the cooling water flow rate on the tube length. All other conditions, including the outlet oil temperature of 60°C, remain the ..
The pressure at section (2) shown in Fig. P8.73 is not to fall below 60 psi when the flowrate from the tank varies from 0 to 1.0 cfs and the branch line is shut off.
Experimentally verify the noise level, time-constant, and accuracy of both systems.
an insulated system is divided into 2 parts by a partition . one part of the tank contain 2.5 kg of compressed liquid
Montgomery Burns is injecting Carbon Dioxide into the atmosphere on a cold winter day in an attempt to make the climate of Springfield sub-tropical. The CO2 enters the pipe at a pressure of 3MPa and 225 C and leaves the pipe at the same pressure but ..
A vibratory system with a moving base has a mass of 300 kg, a spring with a stiffness of 40000 N/m and a damper with an unknown damping constant. It is observed that the mass vibrates with an amplitude of 10 mm when the support oscillates with an amp..
A 15.2 mm (0.60 in.) diameter cylindrical rod fabricated from a 2014-T6 aluminum alloy (Figure 8.34) is subjected to a repeated tension- compression load cycling along its axis. Compute the maximum and minimum loads that will be applied to yield a..
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