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1) A 5mm thick sheet of palladium with a cross sectional area of 0.2m^2 is used as a steady-state diffusion membrane in order to purify H2.The H2 concentration on the high pressure side of the sheet (i.e., the impure H2) is 1.5kg/m3 and that at the low pressure side is 0.3kg/m3. The diffusion coefficient for H2 in palladium is 1x10^-8m2/s. Assume a linear concentration profile within the plate. Calculate the mass of H2 being purified per hour.
2) If a (carburizing) carbon-containing gas diffuses under the surface of a steel shaft, the concentration of carbon under the surface will increase with time as the process proceeds. The steel shaft initially has a carbon content of 0.2wt%. Calculate the time, in minutes, necessary to increase the carbon content to 0.4wt%, at a distance of ½mm below the surface. The temperature is 1700°F. The carbon content at the surface is 0.892wt%. The diffusion coefficient at 1700°F is 1.28×10^-11m2/s.
the snowmobile is traveling at 10m/s when it leaves the embankment at A.determine the speed at which it strikes the ground at B and its maximum acceleration along the trajectory AB.
water at 15 degrees celsius flows through an inclined 8-cm diameter pipe. at sections 1 and 2 p1 186 kpa v1 3.2 ms z1
a cube is originally at 100 degree. from t 0 on the faces are held at 0 degree. find the time-dependent temperature
consider steady heat transfer through a 5m x 6m brick wall of a house of thickness 30 cm. on a day when the temperature
a wad of clay mass m1 with an initial horizontal velocity v1 hits and adheres to the massless rigid bar which supports
a rigid tank whose volume is 10l is initially evacuated. a pinhole develops in the wall and air from the surroundings
4 kgs of saturated liquid water is heated in a steam boiler at 2 mpa to an outlet temperature of 250 c. determine the
A car is driven along a straight track with position given by s(t) = 150t – 300 ft (t in seconds). Find v(t) and a(t). Use calculus to find the displacement and total distance traveled over the interval [1, 4].
Two forces are applied to the pipe AB as shown. Knowing that the pipe has inner and outer diameters equal to 35 mm and 42 mm, respectively, determine the normal and shearing stresses at (a) point a, and (b) point b
ten grams of liquid water at 95 c are contained in the insulated container shown. the pin holding the frictionless
propane undergoes a process from state 1 where p11.4 mpa t160 c to state 2 where p21.0 mpa during which the change in
1. water at 80degf flows from a storage tank through 550 feet of 6-inch nominal size cast iron pipe actual id 6.52
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