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Two aluminium bars (E = 70 GPa) are attached to regid support at the left and a cross-bar at the end. An iron bar (E = 200 GPa) is at attached to the rigid support at the left and there is a gap b = 0.6 mm between the right end of the iron bar and cross-bar. The cross sectional area of each bar is A = 400 mm2 and L = 250 mm. If the cross bar is loaded with a load P = 250 kN, what are the normal stresses in the bars afterward?
An Element of soil (sand) behind a retaining wall is subjected to an increase in vertical stress of 60kPa and an increase in lateral stress of 25 kPa. Determine the increase in vertical and lateral strains,
The maintenance costs begin in 31st year at $300,000 annually. How much must be deposited now if the fund will earn 5% interest. How much does this change if the interest rate is 4%
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? A factor of safety of 2 is to be maintained against be..
The Pomdeterra wastewater treatment plant produces a thick sludge that has a suspended solids concentration of 3.8%. They are investigating a filter press that will yield a solids concentration of 24%.
The cart has a velocity of 4 ft/sec to the right. Determine the angular speed N of the wheel so that point A on the top of the rim has a velocity (a) equal to 4 ft/sec to the left, (b) equal to zero, and (c) equal to 8 ft/sec to the right
Two level sections of an east-west highway (G = 0) are to be connected. Currently, the two sections of highway are separated by a 4000-ft (horizontal distance), 2 % grade. The westernmost section of highway is the higher of the two and is at eleva..
Draw the shear diagram for the shaft. The bearings at and exert only vertical reactions on the shaft
A smooth nozzle with a tip diameter of 2 inches terminates a 6 in waterline. Calculate the mean velocity of efflux from the nozzle when the velocity in the line is 10 ft/s.
The wastewater influent has a linear velocity of 0.5m/s and contains 3.0x10^5 fecal coliform colony unit (CFU) per liter. Determine the coliform concentration of the discharge effluent into Back river.
Determine the water level rise in an unconfined aquifer produced by a seasonal precipitation of four inches. The aquifers porosity is 20 percent and its specific retention is 9 percent.
The tube supports the four parallel forces. Determine the magnitude of the forces and acting at C and D so that the equivalent resultant force of the four forces acts at point O.
Knowing that as a box B is released, the preceding box A has slid 6 meters down the slope and that 1 second later they are 10 meters apart, determine the following: (a) The value of trelease (b) The acceleration of the boxes.
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