The two pond system shown in the figure below is fed by a stream with a flowrate of 1.0 MGD and a BOD concentration of 20 mg/l. The rate of decay of BOD is 0.39/day. The volume of the first pond is 5.0 million gallons, and the second pond is 3.0 million gallons. Assuming complete mixing within each pond, find the BOD concentration leaving each pond?

What total allowable bod kg per day could be discharged : A 5000 m3/day wastewater treatment plant discharges to a river with a minimum drought flow of 140 m3/min (upstream of outfall) a)What total allowable BOD (kg/day) could be discharged by the plant if the BOD in the river after initial dilution must .. |

What is the speed of a satellite orbiting at that height : At what height above the earth is the acceleration due to gravity 20.0% of its value at the surface |

Describe how many grams of dry nh4cl need to be added : How many grams of dry NH4Cl need to be added to 2.30L of a 0.800 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.83? Kb for ammonia is 1.8 * times 10^-5 |

At what maximum speed can the sports car negotiate the curve : A sport utility vehicle (SUV) and a sports car travel around the same horizontal curve. The SUV has a static stability factor of 0.74, At what maximum speed can the sports car negotiate the curve without rolling over |

Determine the bod concentration leaving each pond : The volume of the first pond is 5.0 million gallons, and the second pond is 3.0 million gallons. Assuming complete mixing within each pond, find the BOD concentration leaving each pond |

Explain sample of khc8h4o4 is dissolved n water : The acidic anion reacts with strong bases according to the following net ionic equation HC8H4O4-(aq) + OH- (aq)--->C8H4O4-2(aq) + H2O(l) If a 0.902g sample of KHC8H4O4 is dissolved n water and titrated to the equivalence point |

What is the initial angular velocity of the disk : A small block having mass m sits on a uniform disk that has radius R=0.5m. What is the initial angular velocity of the disk |

Find what is the fluid velocity ft per day in the aquifer : Two monitoring wells were constructed in an unconfined aquifer. The wells are separated by a distance of 250 ft. The water surface elevations in the up-gradient and down-gradient wells were 101.00 and 100.85 ft, respectively. |

What is the firm cost of goods sold : Ellicott City Manufacturers, Inc. has sales of $6,344,210, and a gross profit margin of 67.3 percent. What is the firm's cost of goods sold? |

## Level of the service of compound-grade freeway segmentThere are no interchanges in the vicinity of this freeway segment. If the peak-hour factor is .90 and all of the drivers are regular users, what is the level of the service of this compound-grade freeway segment? |

## Calculating the relative compaction of a dam projectA dam project specifies 97% compaction. Lab tests on the soil being used indicate that it has a maximum dry density of 1900 kg/m 3 at an optimum water content of 13.2%. |

## Find the weight per lineal foot for a normal weight of beamthe unit weight of normal weight reinforced concrete is commonly assumed to be 150 lb/ft cubed. find the weight per lineal foot (lb/ft) for a normal weight reinforced concrete beam that: a. has a rectangular cross section 16 in. |

## Total mass-quality of steam-specific volumeFind the total mass, quality of steam, specific volume, specific enthalpy, and specific internal energy. |

## Determine the cycle time for a single engine scraperDetermine the cycle time for a single engine scraper rated at 21 cy heaped that is used to haul material from a pit to a fill 900 ft away under severe conditions. |

## Find the shortest laddera wall 8 ft high is 3/3/8 ft. from a house. find the shortest ladder which will reach from the ground house when leaning to the wall. |

## Calculate consolidation settlement caused by weight of fillAn 8.5 m compacted fill is to be placed over the soil profile. Consolidation tests on samples from points A and B produced the following results. a) Calculate the consolidation settlement caused by the weight of this fill. |

## Angular acceleration of the spooldetermine the angular acceleration of the spool and the acceleration of the trailer. The wheels have negligible mass and are free to rotate. |

## Plot the data as a graph on log log paper showing the volumeThe volume of a sphere is V=4/3pir^3. Prepare a table of volume versus radius which allows the radius to vary from 2.0 to 10.0 cm in 1 cm increments. Plot the data as a graph on log log paper showing the volume to radius relation |

## Determine what is the pressure acting on the sandA 3-ft diameter column with weight of 150 kg is placed on top of 1 m thick aggregate layer. The soil beneath the aggregate layer is sand. The friction angle of the aggregate is 36 degrees and the unit weight is 22 lb/ft3. What is the pressure acti.. |

## Determining the crest and sag vertical curvesDetermine, for the crest and sag vertical curves required, the stationing and elevation of the PVCs and PVTs given that the PVC of the crest curve(on westernmost level highway section) is at station 0+00 and elevation 100 ft. |

## Calculate the maximum stress in the metalA cast iron water main 14m long of 600 mm inside diameter and 30 mm wall thickness runs full of water and is supported at its ends. Calculate the maximum stress in the metal if density of cast iron is 7200 kg/m and that of water is 1000 kgm. |

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