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A proposed square footing carrying a total load of 500 kips is to be constructed on a uniform thick deposit of dense cohesionless soil. The soil's unit weight is 135 pcf, and its angle of internal friction is 38 degrees. The depth of the footing is to be 5 feet. Determine the dimension of this proposed footing, using a factor of safety of 3.
The river characteristics just upstream of the wastewater discharge are: flow = 7.5 m3/s, BOD = 5.5 mg/L, DO = 90% of saturation, and temperature = 25oC. For this water, kd = 0.18 d-1 and kr = 0.22 d-1.
What would be the absolute pressure, P in kPa, of carbon dioxiode at 20 degrees celcious if the specific weight of carbon dioxide at 20 degrees celcious is 18 N/m^3 and the gas constant, R =1.889x10^2 J/kg*K.
Drawdown at an observation well 15 m from the pumped well is 3.0 m, and drawdown at a second observation well 150 m away is 0.30 m. find the hydraulic conductivity of the aquifer.
suppose 76% of all commuters ride to work in carpools. if eight workers are randomly selected, find the probability that at least 7 will ride in carpools
It is known that a horizontal curve starts (has PC) 90m before the vertical curve's PVC. If the superelevation of the horizontal curve is .08 and the central angle is 38 degrees what is the station of the PT
A carbon steel tank, 6ft. inside diameter X 10 ft. long with a 3/8 inch wall, is sitting on evenly spaced rolls and 4 evenly spaced supports (2 on each side). What is the horizontal force excerted on the supports
(a) how many pounds of ferric chloride per million gallons are used (b) how many pounds of hydrated lime per million gallons are used, assuming a purity of 70 % CaO
A barge measures 10 ft (depth) by 35 ft by 120 ft and weighs 100 U.S. tons. The barge floats in fresh water (specific weight = 62.4 lb/ft3) and is evenly filled with 38,000 bushels of corn (60 lb/bushel).
What is the velocity head expressed in atmospheres for a rapid filter operated at a surface loading rate of 475 m/d when the local porosity is 0.40?
The undercarriage for an aircraft uses two springs between each wheel and the aircraft fueselage to cuhion the landing of the aircraft. There are two sprung wheels and the mass of the aircraft is 5000kg
The 2 Mg car is being towed by a winch. If the winch exerts a force of T=105s on the cable, where 14m is the displacement of the car in meters, determine the speed of the car when s , starting from rest. Neglect rolling resistance of the car.
A trapezoidal canal 6m wide at the bottom and having a side slope of 1V:2H carries water with a mean velocity of 1.0m/s to a depth of 60cm. What length of contracted rectangular weir 1.0m high should be placed at the middle of the canal to make th..
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