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Calculate the Pilling-Bedworth ratio for the formation of A12O3 from Al and compare the efficacy of oxide-induced crack closure for aluminum alloys with that for steels solely on the basis of the volume of oxide produced on the fatigue fracture surface.
Let a one-dimensional velocity field be u = u(x, t), with v = 0 and w = 0. The density varies a ?-?0(2-cos(wt)) Find an expression for u(x, t) if u(0, t) = U.
Concrete cover on both sides. Sketch how you will place the bars and calculate the location of the effective depth. Place as many bars in the lower layers as possible.
Describe the equation for charging a water tank. Use: H= 2m, A_s = 1m^2, density water = 1000kg/m^3, K = 2000kg hr^-1 Mass flow in = K t. Calculate how long will it take to charge completely the tank
A meter long steel plate with a rectangular cross section(10mm x 50mm) is resting on a frictionless surface under the sun.the plate temperature is measures to be at 40C.the plate is then moved into a cold room and is left to rest on a frictionless su..
Determine the angular acceleration of the cylinder and the minimum coefficient μs of friction for which the cylinder will not slip.
A child at a park finds a ball floating in a freshwater pond (temperature 30 degree C). The child swims to the ball and, with an incredible amount of dexterity, balances himself on the ball
a dam project specifies 97 compaction. lab tests on the soil being used indicate that it has anbspmaximum dry density
A reaction of great significant for undergraduate students is the fermentation of sugar with yeast. This is a zero order (in sugar) reaction, where the yeast is a catalyst (it does not enter into the reaction itself).
A piston-cylinder assembly containing 1/4 kg of a gas undergoes a constant pressure process at 5 bar beginning with a specific volume of 20 m^3/kg. for the gas in the system the work is -15 kj. determine the final volume of the gas in m^3
The 30-Mg freight car A and 20-Mg freight car are moving towards each other with the velocities of VA= 20km/h and VB=10 km/h. A spring mounted on A has k=3 MN/m Determine the maximum compression of the spring mounted on car A.
Groundwater moves through a sandstone porous media and is driven by a gradient of -0.05 directed at an angle of 60 degree counterclockwise from the x-axis.
One can lease a car for $550 per month with no down payment or purchase one for $20,000 now. If the nominal interest rate is 8% per year, how many months of use necessary for the two to break even
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