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A simply supported beam is to span 15 feet. It will support a uniformly distributed load of 2 kips per linear foot over the full span and a concentrated load of 60 kips at midspan. Total deflection is not to exceed span/240. Select the lightest (economical) steel wide flange section (W shape) with a yield stress of 50 ksi. Assume the beam weight to be 100 PLF
What is the maximum length of trench that can be excavated by hand economically rather than by a trenching machine. It will cost $900.00 to transport a trenching machine to the job and back to the storage yard.
1. What is meant by the "base value" in an arithmetic gradient 2. Which two alternative comparison techniques requier equal service lives Why
Assume the microorganisms are 55 percent efficient at converting food to biomass, the organisms have a first-order death rate constant of 0.05/day, and the microbes reach half of their maximum growth rate when the BOD5 concentration is 10 mg/L
A sample of soil was compacted into a 945 ml.laboratory mold. The mass of the compacted soil was 1850 grams and its moisture content was 13.1%. Specific gravity of solids is 2.70, Compute the moist unit weight, dry unit weight, and degree of satu..
Draw the free-body diagram of member ABC which is supported by a smooth collar at A, rocker at B, and Find the Find the force of CD, and the force acting at point A & B
Find the moment of inertia and natural frequency of a vertical cantilever pipe 12 feet tall with outer diameter of 4.5 inches and an inner diameter of 4.25 inches. Modulus of Elasticity = 10*10^6 Mass = 50 lbs.
Could all the people in china hold back the water behind the three gorges dam?
You wish to retire at age 66 and at the end of each month thereafter for 30 years, to receive $5000. Assume that you begin making monthly payments into an account at age 24.
A flocculation/sedimentation combination basin in a conventional drinking water treatment plant is to be constructed of cast-in-place reinforced concrete. The horizontal flow rectangular basin will be located in New Jersey, USA.
The concrete post (Ec=3.6*10^6 psi and Ac= 5.5*10^-6/degrees F) is reinforced with six steel bars. each of 7/8-in diameter (Es=29*10^6 psi and As=6.5*10-6/ degrees F).
A 200-kg mass is hanging from a hook conncted to a pulley. The chord around the pulley is connected ot the overhead support at two points. What is the tension in each cord connected to the support if the angle of the chord from vertical is 0º
A mining engineer plans to do hydraulic mining with a high-speedjet of water. a lake is located H=300 m above the mine site Waterwill be delivered through L=900 m of hte fire house with an inside diameter D
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