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An SAE steel wire (1mm diameter) is coated with another cover to form a composite material with diameter of 2 mm.
a) determine the elastic modulus of the composite material;
b) determine the maximum force that the composite will carry before either material yeilds.
Material Elastic modulus (GPa) Yeild stress (MPa)
cover 220 140
steel 205 280
A waste water sample contains 2.092mmol/L NaCl. Calculate the concentration of NaCl in mg/L. What are the mmol/L concentrations of Na and Cl. Na = 23 and Cl = 35.5.
For a mixed liquor volatile suspended solids (MLVSS) of 1800 mg/L, what is the total return solids flow rate?
A water treatment plant with a maximum daily flow of 4.4 m3/s is treating surface water with a minimum ambient temperature of -1°C (30°F). The water is coagulated with alum and the alum floc was measured to have a settling velocity of 1.6 m/h at 1..
On this segment of freeway, the directional peak-hour volume is 3800 vehicles with 2% large trucks and 4% buses (no recreational vehicles), the peak-hour factor is 0.90, and all drivers are regular users.
A municipality uses green energy and treats 15 × 106 gal/day of a groundwater containing the following: CO2 = 17.6 mg/L, Ca2+ = 80 mg/L, Mg2+ = 48.8 mg/L, Na+ = 23 mg/L, Alk(HCO3-) = 270 mg/L as CaCO3, SO42- = 125 mg/L, Cl- = 35 mg/L.
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?
is fabricated of two 300 mm X 25 mm flange plates and a 800 mm X 16 mm web plate. the plates are joined by four fillet welds that run continuously for the length of the girder. each weld has an allowable load in shear of 920 kN/m.
How do you calculate pH of water at 25 degrees that contains 0.6580mg/l carbonic acid. Assume that [H+] =[HCO3-]at equilibriumand ignore the dissociation of water.
The central angle is 35 degrees, the superelevation is 0.08, and 20.6 ft is cleared (for sight distance) from the inside edge of the innermost lane. Determine a maximum safe speed (assuming current design standards) to the nearest 5 mi/h.
Data obtained from aerial photography showed six vehicles on a 600 ft long section of road. Traffic data collected at the same time indicated an average time headway of 3.6 sec.
The solid silver chloride is placed in water. It reaches equilibrium and has a solubility product constant of 1.8 x 10-10. What is the concentration of silver if the chloride concentration is raised to 3M
The river channel itself is 20m wide and flow depth is 5m and the sandy bottom has an n=0.02, the left bank is 40m wide and the flow depth is 0.5m, while the right bank is 100m wide with a flow depth of 1m.
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