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Determine the size PFR and CFSTR's required to treat 4000 m3/day of sewage with a BOD of 200 mg/L. State law requires a minimum of 92% removal and BOD follows first order kinetics.
Describe the given types of bonding agents found with clay minerals. a) hydrogen bond b) covalent bond c) van der walls forces d) james bond e) ward bonds f) war bonds.
A pile resists the tension developed by three stay cables for a major for a tent (membrane) structure. Assuming no bending is desired in the pile (no resultant horizontal componenet),
Calculate the change in pH of rainwater resulting from an increase in the PCO2 from 10-3.5 atm to 10-3.0 atm due to fossil fuel emissions.
Water flows through a 4-cm pipe, wrought iron, horizontal pipeline 50-m long from point A to B, and contains a fully opened gate valve and two elbows (R/D = 4).
Draw the shear diagram for the shaft. The bearings at and exert only vertical reactions on the shaft
A piston cylinder contains 0.8kg of steam (water vapor) at 300 deg C and 1MPa absolute. The steam is cooled at constant pressure until half of the mass condenses.
The acceleration of point A is defined by the relation a = -1.08sin kt - 1.44 cos kt, where a and t are expressed in m/s^2 and seconds, respectively, and k = 3 rad/s. knowing that x = 0.16 m and v = 0.36 m/s when t = 0
Neglecting kinetic and potential energy changes and assuming the ideal gas model determine the work developed of air flowing through the turbine
If the critical point in a DO sag curve is found to be 18km downstream from the discharge point of untreated wastewater, would you expect the critical point to move upstream (toward the discharge point)
Laboratory analysis methodology to be used. Give details on the standard methods, instrument and detection limits. Standard methods for heavy metals analysis exist
A 10-year, 12%, $1,000 bond that pays dividends quarterly can be purchased for $900. If the bond is purchased and pays as scheduled, calculate the nominal and the effective rate of return that the purchaser receives.
Describe, with equation and diagram, the flow-discharge characteristic of a long, inclining pipeline that has friction and fitting loss, and a small, positive static pressure head.
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