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For a given load increment, the time for 50% consolidation was 5 min 20 sec. How long will it take for 50 % consolidation of a similar clay layer in the field that is 8.2 ft thick & drained on o
Consider a 1000 acre residential area with a housing density of four dwellings per acre. Evaluate the peak hourly water use requirement.
If 100 acres of farmland were developed for urban housing (four houses per acre), what would be the difference in average annual water requirements after the change over
A reservoir has a capacity of 2.75 million acre-ft. How many years would this supply a city of 100,000 people if evaporation is neglected. Assume a use rate of 180 gpcd.
the weight of a sample of coarse aggregate was measured under various conditions with the following results: oven-dry weight in air 1076.3 g air-dry weight in air 1083.3 gsaturated-surface-dry weight
The air above the liquid is under a pressure of 5 psig, and the specific gravity of the liquid in the tank is 0.80. If the rectangular gate is 6 ft wide and if y1 = 1 ft and y2 = 10 ft, what force P
A sample of clay was obtained from a point below the water table. An oven-drying test performed on this sample resulted in the following data: Mass of can= 10.88 g Mass of can + wet soil = 116.02 g
How much oxygen (mg O2) is required to support the complete oxidation of 500 mg acetate (CH3COOH). How much carbon dioxide (CO2) will be produced
Laboratories containing dangerous materials are often kept at a pressure slightly less than ambient pressure so that contaminants can be discharged through an exhaust system rather than leaked throu
if you switch the sign of all the components of a vector (this called"parity reversal "),what happens to the length of the vector. what happens to the direction of the vector
A cylindrical specimen of some alloy 50.26 mm2 in cross sectional area is stressed elastically in tension. A force of 1620 N produces a reduction in specimen diameter of 5 X 10-3 mm. Compute Poisson
A cylindrical rod of brass alloy (E = 100 GPa,) having a yield strength of 345 MPa is to be subjected to a load of 7500 N. If the length and diameter of the rod are 338 mm and 7.55 mm respectively,
A lagoon with volume 1,200 m3 has been receiving a steady flow of a conservative waste at a rate of 100 m3/day for a long enough time to assume that steady-state conditions apply. The waste entering
As part of a drainage improvement project, a drainage ditch will be straightened and cleaned. As a result, the lenght of the ditch will decrease from 1800 ft to 1400 ft and the mannings roughness fa
A water supplier wants to inject ozone into a piper bringing water to the water treatment plant to predisinfect the influent. The 3.0-ft diameter piper is 3,400 feet long with a steady flow rate of
The strain in member AB was measured to be 8.9*10-4. If the member is an L3*2 1/2* 1/4 of A36 steel determine the following: a) What is the change in length in inches b) What is the force in the membe
To what precision (how many decimal places) must you know the value of a decimal degree in order to reliably convert it to the nearest second (1/3600 of a degree) To what precision (how many decimal
Given the following data for an undisturbed soil sample: Gs = 2.69, e = 0.65, water content = 10% Determine wet unit weight and dry unit weight, wet and dry density
Chemical ‘x' is regulated by EPA and the maximum allowable concentration in water is 10g/L. 1000 kg of chemical ‘x' is released in a lake (volume 1,000 m3) where it undergoes degradation
Derive the porosity values for cubic, orthorhombic, and rhombohedral packing of spheres. Include sketches supporting your calculations of the bulk volumes of the unit cells.
You have a beaker filled with coarse sand. The capacity of the beaker is 100cm^3. Next, you add to the beaker 40cm^3 of distilled water, filling the water level exactly to the top of the sand.
You are furnished with three sizes of particles. One is gravel with porosity of 0.32, the second is a coarse grained sand with porosity of 0.37, and the third is a fine grained sand with porosity of
A water pipe, in diameter id located in a trench 450mm below the center of the slab. The trench running along the length of the slab,300mm wide and 450mm deep, was backfilled with the same soil. If
The volume and the average density of an irregularly shaped body are to be determined by using a spring scale. The body weighs 7200 N in air and 4790N in water. Determine the volume and density of t
Thirty six year old Johnson was in his last semester of his graduate program in Civil engineering. Father of two small children, he was anxious to get his degree so that he could spend more time wit