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Boron is diffused into highly pure germanium at 1000oC (Q = 105 kcal/mol; DO = 1.1 x 10 m2/sec). A steady surface concentration of 1.5 at.% B prevails at this temperature. a) After diffusing for ½ hr at what location will a B content of 0.5 at.% be found? What will be the concentration of B at that location after 2 hrs of diffusion?
steel rods of 0.05m diameter are heat treated by being passed through a heat-treating furnace in which the atmosphere
an insulated rigid-wall tank contains air at 20 c and 2 bar. a paddle wheel located in the tank does work on the air in
write down expressions for the normal strain and the true strain for the following situation 1 in a tensile test where
nitrogen at 80 kpa and 400 k enters an adiabatic diffuser steadily at a flow rate of 6000 kgh at 230 ms and leaves at
How often would the sample have to be taken - If the objective was to determine the average value of the material in the bunker, how could this be done by making one measurement?
an engineer determines that a 40-cm-long rod of 1020 grade steel will be subjected to a tension of 20 kn the following
q1 write a matlab code which must have following inputs and outputsinputs1. an arbitrary geometry matrix2. basis
Calculate the concentration (in weight percent) of molybdenum that must be added to tungsten to yield an alloy that contains 1.51 x 1022 Mo atoms per cubic centimeter.
the yield strength of mild steel with an average grain size of 0.05 mm is 20000 psi. the yield strength of the same
consider a rankine cycle with a single regenerative feed-water heater. the steam enters the turbine at 30 bar 400c and
What are the knot values? How many different curves is the B-spline curve composed of? Expand the B-spline curve equation to get the separate equations of the curves in b.
applied thermodynamics 5th ed. by eastop and mcconkey problem 3.1 1 kg of air enclosed in a rigid container is
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