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given moisture contents of 5%, 9%, 14%, 22% and 25% with corresponding weights of 3.1, 3.42, 3.78,3.85, 3.77 lbs. of the compacted soil. (specific gravity =2.7)(compaction test using compaction mold of 1/30 ft^3). I found the dry unit weights and moist unit weights for each. I believe i have also accurately found max dry unit weight which was 99.5 lb/ft^3 and optimum moisture content, my question is : If the initial water content of the soil is 9% how many gallons of water per cubic yard should be added to the fill material to reach 100% maximum dry unit weight and optimum moisture content?
A tank containing acetone at 20 oC has a drain pipe connected vertically at the bottom. The pipe is made of galvanized iron, 0.5 in NPS Schedule 40 with length L= 2m. The acetone depth in the tank is H= 5 m.
A regular hexagonal pyramid has an upper base edge of 16 ft. and a lower base edge of 28 ft. if the volume of the frustum is 18041 ft^3., find the lateral area of the frustum.
How many moles of aluminum do 5.2×1024 aluminum atoms represent?
Determine the minimum necessary clearance height of the overpass and the resultant elevation of the bottom of the overpass over the PVI. (ignore the cross-sectional width of the overpass)
The steam flow rate entering the pipe is 2500kg/hr. Due to heat loss from the pipe to the surrounding air (at 25 C) 20 kg/hr of condensate is formed in the pipe and removed at the end of the pipe.
sand cone test has been performed . The test results: intial weight of cone + sand =13.51lb, Final weight of sand cone + sand= 4.26lb, weight of sand to fill cone=2.12lb, weight of soil from hole+bucket=12.42lb, weight of bucket=1.21lb
A bar with a circular cross-sectional area is made of SAE 1045 carbon steel having a yield stress of sY = 1000 MPa. The bar is subjected to a torque T=3.75 kNm and a bending moment M=7 kNm. Using a factor of safety FS=2 with respect to yielding
A permeameter with a cross-sectional area of 400 cm2 contains 3 soils in 50 cm thick layers. A total head difference of 2.0 metres results in a flow rate of 100 cm3/s. The head loss through the top layer of soil is 50 cm.
The vertical velocity of the box at the time that it hits the surface is v= 5m/s. After impact the camera experiences an acceleration of a = -kx, where k is a constant and x is the compression of the packing material.
A four- lane undivided multilane highway ( two lanes in each direction) has 11- ft lanes and 5- ft shoulders. At one point along the highway there is a 4% upgrade that is 0.62 mi long.
If an 18.9 L (5 gallon) bucket of PCE is released (and equally distributed) into a 3.79x10^8 L (100,000,000-gallon) aquifer, will the PCE standard of 5 microgram/L under the Safe Drinking Water Act be exceeded
Conduct either a qualitative or quantitative risk assessment on this project. Identify the risk factors that you consider most important for the suspension bridge construction. How would you assess the riskiness of the project? Why?
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