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For some applications, it is necessary to harden the surface of a steel above that of its interior. One way this may be accomplished is by increasing the surface concentration of carbon in a process called carburizing. Consider an FCC iron-carbon alloy with an initial concentration of 0.10 wt% C that is carburized in a furnace in which the atmosphere has a concentration of 1.10 wt% C. After 48 hours, the concentration of carbon 3.5 mm below the surface of the metal is 0.3 wt% C. At what temperature was the furnace operating?
air at 1.0 atmosphere pressure and 77 0c enters a 5.0 mm i.d. tube with a bulk average velocity of 2.5 ms. the velocity
one means of cooling in a hot dry climate is to use evaporative cooling where outside air is drawn into a unit where
find the total heat loss per m length of the steam line. Find also the temperature at the interface of steam and insulation.
a beam having the cross-section shown is subjected to the a vertical shear v.nbspdetermine a the horizontal line along
In the position shown, the angular velocity and the angular acceleration of the rod AB are 4 rad/sec and 6 rad/sec2, respectively, both counterclockwise. For this instant calculate the velocity and acceleration of collar A. ( AB = 600 mm)
1 for the piping diameter changes and flow directions shown below if the velocity at the input is 5 ms the initial
a refrigerator uses refrigerant-134a as the working fluid and operates on an ideal vapor-compression cycle between 0.12
Two kilograms of Refrigerant134a, initially at 2 bar and occupying a volume of 0.12 m3, undergoes a process at constant pressure until the volume has doubled. Kinetic and potential energy effects are negligible. Determine the work and heat transfe..
If the maximum shear stress is limited to one-half of its yield strength and the fillet radius is 0.3 in, what is the maximum torque that can be applied? What power could be transmitted by a similar shaft rotating at 400 rpm?
a piston cylinder device contains 0.25 kg of air initially at 1.8 mpa and 360 degc. the air is first expanded
estimate the annual emissions of co2 and so2 from a 1500 mwth steam generation plant if the boiler operates at 1800 k
20 kg of water at 200 kpa with a quality 25 is heated under a constant volume process until its pressure reaches 400
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