Search
Look at your surroundings and select a material on your choise and write a note about it
Solve for the initial pressure in lb/ft² (before heated) and the heat added in Btu if a 20 m³ steel tank confines 200 lbs of certain gas consisting of 6% Hgas of Cp=3.419 btu/lb°R, R=766.54 ft.lb/lb°R, and 94% Sgasof Cp=0.15413 kJ/kg°K, R=2.7196 ft.lb/lb°R is being heated at constant volume until the absolute temperature doubles when initially at 12°C.
A diffusion couple is made from nickel and iron. After 30 hours of heat treatment at 1400 K,
the concentration of nickel is 3.2 wt % at a distance of 1.5 mm from interface. If an identical
diffusion couple is heated at 1200 K for 30 hours, at what depth from the interface will the
concentration of nickel be 3.2 wt %? The pre-exponential factor (Do) and activation energy for
diffusion is 1.8 x 10-5 m2
/s and 152 kJ/mol respectively, and the surface concentration of nickel
is 100 wt%. (Note that this is a non-steady state diffusion process).
Compute the mean annual precipitation for the watershed in the figure for Problem 2.3 using the arithmetic mean and the Thiessen polygon method. The gauge readings for gauges A-K, respectively, are: 28.1, 33.7. 25.6. 23.9. 24.6. 40.7. 41.3.37.2. 38.7. 41.1, and 29.3
2.4. Compute the mean annual precipitation for the watershed in the figure for Problem 2.3 using the arithmetic mean and the Thiessen polygon method. The gauge readings for gauges A-K, respectively, are: 28.1, 33.7. 25.6. 23.9. 24.6. 40.7. 41.3.37.2. 38.7. 41.1, and 29.3
A unit cube of a transversely isotropic solid is subjected to uniform surface tractions resulting in the strain, , where is a constant. The symmetry axis of the solid is on the -plane and is inclined at angle to -axis.
(a) Calculate the applied tractions in terms of the elastic constants and .
(b) Compare results with those for an isotropic solid.
1. Convert the following arithmetic expressions from infix to reverse Polish notation.
a. A * B + C * D + E * F
b . A * B + A * (B * D + C * E)
c. A + B * [C * D + E * (F + G)]
d. A * [B + C * (D + E)] / f * (G + H)
Determine the equivalent circulating density in ppg for laminar flow of drilling fluid with the following data.. mud weight=9.5ppg, tita 300 =40, tita600=60; plastic viscosity=20cPs; circulation rate=650gpm; hole diameter=8.5 in; drill collect OD=6.75in drill pipe OD=5.0 in; drill collar length=600ft; drill pipe length=10,000ft; true vertical deepth= 9000ft
Calculate the pressure gradient in psi/ft from mud weight of 10.0ppg b. Calculate the pressure gradient in psi/ft from mud weight of 80Ib/ft^3.
Determine the volume of cement slurry required to set in the annulus of 20inch conductor pipe, and 107/8- inch casing. Total length of 20inch conductor pipe is 80feet for 107/8 inch section
