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A first order reaction occurs in a PFR at the rate of 2.1 hr^-1. The reactor volume is 1400L and flow is 15 gpm. If the influent concentration is 200 mg/L, then what is the effluent concentration?
a layer of clay, 5m thick, overlies a deposite of sand, 5m thick, which is underlaid by rock. the water table in the sand is sub-artesian with a level at 2m below fround level. the saturated unit weights of the clay and sand are 21 and 16 KN/m^3 r..
Groundwater moves through a sandstone porous media and is driven by a gradient of -0.05 directed at an angle of 60 degree counterclockwise from the x-axis.
Determine the major and minor principal stresses at failure and the effective stress friction angle (assume c' = 0). Plot the Mohr diagram.
two strips of a plastics material are bonded together as shown. The average shearing stress in the glue must be limited to 1000 kpa. what length L of splice plate is needed if the axial load carried by the joint is 55 kN and the width (W) is 315 m..
Consider a 2D triangular element with the three vertices at 1[1,1], 2[1,2] and 3[2,2]. the displacements at these t hree points are [0.1,0.1], [0.3,0.2] and [0.4, 0.3] mm for point 1,2,and 3 respectively
The wastewater influent has a linear velocity of 0.5m/s and contains 3.0x10^5 fecal coliform colony unit (CFU) per liter. Determine the coliform concentration of the discharge effluent into Back river.
A 1.5m diameter barrel (concrete barrel, well-rounded entrance) that is 20 m long is installed on a slope of 2 percent. The design discharge is 9.5 m^3/s and the inlet will be submerged but not the outlet.
Maximum dry unit weight was found to be 114lb/ft^3 at a water content of 13.5% in labratory tests. Results of a field unit weight test were dry unit weight=111lb/ft^3 and a water content 11%.
The length is 10 feet. What is the nominal strength if Fy=50 ksi. Note that this is a slender-element compression member, and the equations of AISC section E7 must be used
If the flowrate is Q = 25 ft^3/s and the upstream depth is 2 ft, determine the downstream depth. Sketch the specific energy diagram and indicate its important characteristics. Note that the specific discharges are different.
Given a type of material used in a wire with diameter (d = 0.25 in) that stretches 2.3 inches while 80 feet of length is under tensile load of 1800 pounds. Find the elastic modulus of the material used to construct the wire.
Compute the maximum acceptable tensile service load T that may act on a single angle L6x4x3/4 that is welded along only one leg to a gusset plate; thus, there are no holes. The service load is three times the dead load. Solve for a0 A36 steel.
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