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A vertical retaining wall 25 feet high supports a deposit of sand having a level backfill. Soil properties are as follows:
unit weight=120 lb/cubic foot
angle of internal friction=35 degrees
c=0
Calculate the total active earth force per foot of wall and its point of application from the base of the wall. Use Rankine theory.
Calculate the total active earth force per foot of wall if the angle of wall friction between backfill and wall is 20 degrees.
Briefly explain how each of the following influences the tensile or yield strength of a semicrystalline polymer and why: (a) Molecular weight (b) Degree of crystallinity (c) Deformation by drawing (d) Annealing of an undeformed material
A gas containing 80% CH4 and 20% (by mole) He is sent through a quartz diffusion tube to recover the He. 20% by weight of the original gas is recovered and its composition is 50% He.
A soil sample was taken from a proposed cut area in a highway construction project and sent to a soils laboratory for a compaction test, using the Standard Proctor compaction procedure. Results of the test are as follows:
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..
You have been assigned to design a heat exchanger to cool a gaseous process stream in a chemical plant. The stream flow at 20 kg/s and enters at 431 oK, It has a heat capacity of 3.45 J/g-oC , and needs to be cooled to 402 oK.
If 0.100 mol each of SO2 and NO2 are placed in a 500 mL vessel at this temperature, what are the concentrations of the reactants and products when equilibrium is established for this reaction?
4 in diameter pipeline 200ft long discharges water from nozzle with 2 in diameter jet at an elevation which is 100ft below the water level of supply reservoir. find flow rate through pipe
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.
Calculate the temperatures of the object with the indicated solar albedo and IR emissivity placed out in the sun where solar radiation is 1100 W/m^2. Assume a rectangular shape of length 4 m and width 3m.
A tow truck is searching a city street at 30 mi/h for illegally parked vehicles. It travels over an equal tangent vertical curve with an initial grade of +3.5% and final grade of -4.0%.
how do the crack behaves under the compression of a concrete cubes under friction between the plates and specimen with stress strain diagram?
An equal-tangent crest vertical curve is designed with a PVI at station 110+00 and a PVC at station 107+43.3. if the high point is station 110+75.5 what is the design speed of he curve?
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