The purification of hydrogen gas is possible by diffusion through a thin palladium sheet. Calculate the number of kilograms of hydrogen that pass per hour through a 4.3-mm-thick sheet of palladium having an area of 0.76 m at 500°C. Assume a diffusion coefficient of 5.4 x 10 m, that the concentrations at the high- and low-pressure sides of the plates are 4.2 and 0.59 kg/mPof hydrogen per cubic meter of palladium, and that steady-state conditions have been attained. M- kg/h

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Engineering Drawing

Technical drawing has been around since ancient times. As in the ancient Renaissance, complicated drawings were created, including Leonardo da Vinci's drawing. Modern engineering drawing, including its specific orthographic projection with scale conventions, began in Europe (France) during the early stages of Industrialization. L.T. C. Rolt also made some of Marc's drawings for its block-making machinery (in 1799) that also may have contributed significantly to British engineering technology. Since he learned the art of presenting three-dimensional(3D) items in a two-dimensional(2D) plane, as we now term mechanical drawing.