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A large sheet of material 40 mm thick contains dis- solved hydrogen (H2) having a uniform concentration of 3 kmol/m3. The sheet is exposed to a fluid stream that causes the concentration of the dissolved hydrogen to be reduced suddenly to zero at both surfaces. This surface condition is maintained constant thereafter.
If the mass diffusivity of hydrogen is 9 X 10-7 m2/s, how much time is required to bring the density of dis- solved hydrogen to a value of 1.2 kg/m3 at the center of the sheet?
The desire is to raise the temperature of the ambient air from 60 degree F to 350 degrees F. I need to calculate the amount of steam energy in BTU's per minutes and lbs of steam per minute necessary to accomplish the increase in air temperature?
There is a membrane made of an isotropic material whose elastic modulus and Poisson's ratios are E and v, respectively. When this membrane is elongated along x-direction with no lateral deformation in y-direction, the apparent elastic modulus (E') de..
Write a MATLAB program that can calculate the cross-sectional areas for the rectangle, solid circle, hollow circle, solid semicircle and right triangle shapes. The program should allow the user to enter the dimensions SI and ips units, and give the r..
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A 168-grain bullet is accelerated in a 20 inch barrel and leaves the muzzle at 2800 ft/s. A) Determine the work done on the bullet by all external forces while the bullet is traveling in the barrel. B) Determine the kinetic energy of the bullet at th..
given a variable speed centrifugal pump initially pumping 32000 pounds mass per hour lbmhr at a discharge pressure of
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