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1.The following truestresses produce the corresponding true plastic strains for a brassalloy:
True Stress(psi) True Strain
60,000 0.15
70,000 0.25
What true stressis necessary to produce a true plastic strain of 0.21?
2.A coal mine's entry and breakthrough centers are set at 60ft with 20ft-wide openings. The 6ft coal seam lies 1,000ft below the suface, and the specific gravity of the overburden is 2.4. If the compressive strength of 4in. cubic coal specimens is 5,000psi, dtermine the safety factor for compressive failure of the pillers utilizing the Holland-Gaddy relationship.
Determine the height, h, the water level will rise in the tank before remaining constant. Also, if initially the tank is empty, what amount of time will it take for the water level to rise to h? Be sure to justify all assumptions made.
The interior angles in a six-sided closed polygon traversewere observed as:
What is the maximum column load in kips that could be placed on a 4-ft square temporary footing on a sand for which the standard resistance is about N=15 and the water table is at the surface
If a sample of wood measuring 1.45" x 3.45" x 6" long has a green weight of 8.55 lb. Determine the specific gravity of this wood.
Given that the moduli of electricity of this material are respectively 69GPa and 393 GPa plot modulus of elasticity versus the volum percent of Al2O3 in Al from 0 to 100 vol % using both upper and lower bound expressions
A chemical plant uses a tube-within-a-tube counterflow heat exchanger to heat air with the use of steam. During steady state operation, the air flows into the exchanger at a rate of 5,000 kg/h and a temperature of 27C and exits at a temperature..
what is the maximum load that may be applied to a specimen with a cross sectional area of 130 mm^2 without plastic deformation.
A one tenth scale model of a soap box derby car is tested in a wind tunnel. The air speed in the wind tunnel is 70m/s, the air drag on the model car is 240 N, and the air temperature and pressure are identical to those expected
The slope of the channel So=.15% and the Manning n=.038. Estimate the depth y2=100m upstream of a section where the flow depth y1=2.2m Using a) the direct integration method and b) the standard step method.
The medium contains a wetting phase in equal proportions. Calculate the numerical value of the Leverett J- function for this idealized porous medium. Assume the wall thickness of the capillary tube to be negligible small.
What is the corresponding horizontal distance between the points - The slop distance 156.777 from one poin to another at rate of+1.5%
a sewage treatment works stw with 4 single-stage trickling filters has become organically overloaded due to the
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