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A normal Proctor compaction test performed in a given soil, Gs = 2.60, gave the results shown in Table 1.
a) What is the degree of saturation and void ratio of a sample of the compacted soil with a moisture content of 3.5% less than the optimum moisture?
b) What is the overall specific gravity of a sample initially packaged with a moisture content of 3.5% below the optimum, then saturated? (Assume that the soil sample can be compressed fully saturated with water without the occurrence of variation in height thereof).
Table 1:Moisture content (w in %) : 11 13 15 17 19 21Total Specific Gravity : 18.2 19.5 20.2 20.3 20.1 19.1
A rigid horiztonal bar is suspended from two springs and is subjected to a vertical force of F0 = 158.8 kips. Each spring has a stiffness k = 14.7 kips/inch. If L1 = 11 inches and L2 = 11 inches, use strain energy to calculate the deflection of th..
The train passes point A with a speed of 30 m/s and begins to decrease its speed at a constant rate of at = - 0.25 m/s2. Determine the magnitude of the acceleration of the train when it reaches point B, where sAB = 412 m.
5,000 gpd of primary sludge at 5% solids (50,000 mg/l) and 5,000 gpd of biological treatment sludge (10,000 mg/l) are blended, then thickened to 8% solids. What volume of supernatant is returned to the reactor
horizontal pipe, and the fanning friction factor is f_F = 0.0060. what error in the pressure drop would ensue if the assumption were made that the flow was laminar, abandoning the previous value of the friction factor.
Ocean water contains 0.9 ounce of gold per ton. Method A costs $220 per ton of water processed and will recover 85% of the metal. Method B costs $160 per ton of water processed and will recover e of the metal.
Calculate the pressure inside a 2-mm diameter bubble of water at 20°C and compare with the pressure inside a 2-mm diameter droplet of water at 20°C.
The exterior and interior walls are of concrete block. The roof is constructed of bar joists covered with a steel roof deck, rigid insulation, and built-up roofing.
What is the concentration of tracer in the reactor 1 h after tracer addition is terminated? The reactor had an initial concentration of tracer of 1.0 mg/L when tracer addition commenced.
A condition where there are no net external forces acting upon a particle or rigid body and the body remains at rest. ... forces acting upon a particle or rigid body and the body remains at rest or continues at a constant velocity.
The 20-lb cart B is supported on rollers of negligible size. If a 10-lb suitcase A is thrown horizontally on it at 10 ft/s, determine the length of time that A slides relative to B, and the final velocity of A and B. The coefficient of kinetic fri..
According to a settlement analysis, the weight of this fill will cause 600 mm of the total settlement over a period of 30 years. The differential settlement will probably be about 100mm. Although the building could be supported on spread footing f..
What difference does the tightening of bolt in the friction grip joint make to the load at first slip and the failure load.
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