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A municipal drinking water treatment plant discovers that it has an unacceptably high level of the pesticide carbofuran and must develop a treatment technique to reduce the concentration to satisfy
in the first couple steps you are using the sine function to derive that the interior triange BCG is a right triangle. However, the sine function, by definition, is opposite divided by hypotenuse.
A structural tension member of 10 ft. long with a square cross-section is subjected to a load of 120,000 lb. There is a choice between an aluminum alloy and structural steel, with the following info
The 60mm diameter shaft ABC is supported by two journal bearings, while the 80mm diameter shaft EH is fixed at E and supported by a journal bearing at H. If T1= 2 kN*m and T2= 4 kN*m
If a plus sight of 1.097 m is taken on BM A, elevation 312.547 m, and a minus sight of 0.832 m is read on point x, calculate the HI and the elevation of point x.
You are analyzing a polymer uniaxial tension member used in a lightweight structure. The bottom of the tension member is fixed and the top has a tensile force F = 10,000 pounds on it.
A long trough is supported by a hinge along its lower edge and a series of horizontal cables attached to its upper edge. Determine the tension in each of the cables, at a time when the trough is ful
Design the beam in US customary units using f'c=4ksi and fy=413.4MPa. If necessary use d'=2.5in. Assume an exterior exposure according to ACI 318 and b=15in.
Water from a lower reservoir (water surface elevation) 500 m is pumping to the upper reservoir (water surface elevation 600 m) through a 5000 m long straight pipe with 0.5 m diameter.
The modulus of elasticity of the sand was determined to be 10,000 kN/m^3 throughout. Using the Schmertmann's method, estimate the settlement of the footing four years after construction, using four
A solid rectangular simply supported timber beam 6 in wide, 20 in deep, and 10 ft long carries a concentrated load of 16,000 lb at midspan. Use nominal dimensions.
Assuming that the minimum detention time ( with one train out of service) is 30 s, what is the size of these basins assuming equal size and cubic wetted dimension
A rectangular beam made using concrete with f'c = 6000 psi and steel with fy=60000 psi has a width b= 20 in. The concrete modulus of rupture fr=530 psi.
he base-10 logs of the annual peak discharges in cfs for WY 1965-2010 have a mean of 3.678 and a standard deviation of 0.456. Assume that the probability distribution of the annual peak discharges i
The column bearing is 12 in. measured along the beam, and the bearing plates at the end supports are each 8 in. Investigate this beam of A992 steel for (a) flexure, (b) shear, and (c) satisfactory t
An egual-tangent sag vertical curve is designed with the PVC at station 109+00 and elevation 950 ft, the PVI at station 110+77 and elevation 947.34 ft, and the low point at station 110+50.
Suppose that sodium pentobarbital is used to anesthetize a dog. the dog is anesthetized when its bloodstream contains at least 45 mg of sodium pentobarbitol per kilogram of the dog's body weight.
All but 5 of the 60 years experienced one or more 30-min intensities equaling or exceeding the 2.5 in/hr value. Use the Kimball formula to determine the return period of this intensity using
A trapezoidal canal with a bottom width of 2 m, a side slope Z=1.5, and a longitudinal slope of 0.0006 conveys a flow rate of 3 m^3/s. If the water depth in section 1 is 0.78 m and in section 2
A concrete test cylinder 200 mm in diameter by 400 mm high is tested to failure. The compressive strain at failure is 0.0012. Determine the total amount the cylinder shortens before failure.
A moist soil sample wights 346g.After drying at 105 degree celsius it then wights 284g. the specific gravity of the mass and of the soil is 1.86 and 2.70.
The rod is made of a-36 steel and has a diameter of .25 in. if the springs are compressed 0.5 in when the temperature of the rod is T=40F, determine the force in the rod when its temperature is T=16
Determine the required mass of block A so that when it is released from rest it moves the 5-kg block B a distance of .75m up along the smooth inclined plane in t=2s. Neglect the mass of the pulleys
how long would it take a layer of this clay 5m thick to reach the same degree of consolidation under the same stress and drainage conditions. how long would it take the layer to reach 30% consolidat
Flange thickness hf= 0.2h and web width bw=0.4. The member will be prestress using graded 270 strand. Time dependant losses are estimate at 20% of Pi. Normal density concrete will be used with f'c =