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Perform a material balance on substrate (S) around a chemostat (completely mixed reactor without recycle) assuming a first-order removal for a substrate with a rate constant of 0.5 hr-1. The influent substrate concentration is 150 mg/L, and 90% removal is desired. Determine the detention time in hours for the chemostat, assuming steady-state conditions.
Determine whether a jump may occur at an initial depth of 0.5 m or not. If a hydraulic jump occurs, determine the sequent depth (conjugate depth) to this initial depth
A simple four-leg intersection needs a 2-phase fixed-time signal. The critical flows in the N-S and E-w directions are 600 and 400 veh/hr, respectively, with a 0.95 peak-hour factor.
Wheeling-Pittsburg steel is investigating whether it should replace some of its basic oxygen furnace equipment now or wait to do it later. The cost later (3 years from now) is estimated to be 1,700,000.
Determine the components of displacement at 1. Take E = 200 GPa, I = 250(10^6) mm^4, A = 12(10^3) mm^2 for each member.
the roller coaster track consists of a circle in a vertical plane of radius 150m. find the magnitude of the total acceleration of the roller coaster if, at the time shown, the car is moving at 50 km/hr and is gaining speed at the rate of 0.4g
Diameter of the hose and the nozzle are .25ft and .1ft respectively. If the pressure inside the hose is 60 psig and the flowrate is 1.2 ft^3/s, calculate the horizontal force required to hold the hose in place.
How many 3:4-inch diameter rivets are required to transmit 55,000 lb from the two angles to the gusset plate if the allowable shear stress in the rivets is 15,000 psi Assume each rivet carries the same amount of load.
A car is traveling up a 3% grade on a road that has good, wet pavement. The engine is running at 2500 rpm. The radius of the wheels is 15 inches, the driveline slipage is 3% and the overall gear reduction ratio is 2.5 to 1
What is the Hydraulic Radius of Trapezoidal channel that has a bottom width of 9 feet, side slopes 3:1 (H:V) and the flow depth is 6 feet.
A stress orientation can always be found that maximizesnormal stresses and causes shear stresses to be zero.
Two parallel disks of diameter D are brought together, each with a normal speed of V. when their spacing is h, what is the radial component of convective acceleration at the section just inside the edge of the disk (section A) in terms of D, V, and h..
Consider a tensile test on polycrystalline copper which has a yield strength of 20,000 PSI and a tensile strength of 40,000PSI. The engineering strain at maximum load in a tensile test was 25%.
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