Please explain your answer. Thanks! Gasoline spill in a major river.The mayor of a large downstream city demands an estimate of hours for the spillto get to reach supply plant intake.Emergency responders measure the speed of the leading edge of the spill, effectivelyfocusing on one particle of fluid.Environmental engineers employ a computer model which simulates the velocityfield for any stage of the river, and for all locations (including steep narrow canyonsections with fast velocities, and an extremely wide reach with slow velocities).To compare these two mathematical approaches, which statement is most correct?a. The responders have an Eulerian approach, and the engineers have a Lagrangianoneb. The responders have a Lagrangian approach, and the engineers have an Eulerianone.

Engineering, soil science, biology, and chemistry are used by environmental engineers to solve…

The mayor of a large downstream city demands an estimate of hours for the spill o get to reach supply plant intake. Emergency responders measure the speed of the leading edge of the spill, effectively Ocusing on one particle of fluid. Environmental engineers employ a computer model which simulates the velocity eld for any stage of the river, and for all locations (including steep narrow canyon ections with fast velocities, and an extremely wide reach with slow velocities). To compare these two mathematical approaches, which statement is most correct? Th

The mayor of a large downstream city demands an estimate of hours for the spill o get to reach supply plant intake. Emergency responders measure the speed of the leading edge of the spill, effectively Ocusing on one particle of fluid. Environmental engineers employ a computer model which simulates the velocity eld for any stage of the river, and for all locations (including steep narrow canyon ections with fast velocities, and an extremely wide reach with slow velocities). To compare these two mathematical approaches, which statement is most correct? Th

Residential Construction Academy: House Wiring (MindTap Course List)

4th Edition

ISBN:9781285852225

Author:Gregory W Fletcher

Publisher:Gregory W Fletcher

Chapter14: Branch-circuit Installation

Section: Chapter Questions

Problem 1RQ

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18. Fit the data in the table below into the Greenshields' model and determine; (i) The maximum flow (Qmax)? [1849 veh/h] (ii) The speed at which flow is maximum (Ucap)? [31.3 km/h] (iii) The density at which flow is maximum (Keap)? [59 veh/h] Speed (us) (km/h) Density (k) (veh/km) 53.2 20 48.1 27 44.8 35 40.1 44 37.3 52 35.2 58 34.1 60 27.2 64 20.4 70 17.5 75 14.6 82 13.1 90 11.2 100 8.0 115
A wastewater treatment plant is being designed for a small, growing community. Average flow to a wastewater treatment plant is 4.0 MGD (million gallons per day) with peak flow 50% greater than the average. They expect to use two mechanically-cleaned bar screens so that if one is down for maintenance or a problem there will still be screening available. Determine the minimum wetted area (in ft2) for each bar screen assuming the minimum approach velocity is 2ft/s.
Q-
A gravity settling tank is to be used to clean wastewater for an oil refinery. The wastewater contains 1% oil by volume as small droplets ranging from 100 to 1000 microns which will be removed from the water before the latter is to be discharged into the river. The tank is of rectangular section 2 ft wide by 4 ft deep with provisions for smooth continuous discharge of clean water and skimming off of oil at the surface of the discharge end. If 10,000 gal/min of wastewater is to be cleaned of oil droplets, calculate the length of the settling tank. The specific gravity of oil is 0.87. For water, p = 1000 and μ = 1 cP. Round your answer to the nearest foot. kg m²
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A rectangular tank, 7.99 ft. in length, 7.85 ft. in width, and 8.84 ft. in height, has water to a depth of 7.5 ft. If the tank is accelerated 26.02 ft/s2 along its length, determine the amount of volume spilled (ft3).
8.67 A 1/25 scale model of a spillway is tested. The discharge in the model is 0.1 m³/s. To what prototype discharge does this correspond? If it takes 1 min for a particle to float from one point to another in the model, how long would it take a similar particle to traverse the corresponding path in the prototype?
B. If a pipeline is located between two storage tanks as with example 3.2 (Textbook, p. 142), why should an engineer decide to install the pump close to the tank from which the liquid is to be transferred from? Is the operation of the pump in example 3.2 safe given the data of the problem? Example 3.2-Unloading Oil from a Tanker Specified Flow Rate and Diameter General. The following statements apply oqually to Examples a.2, 3.3, 34, and 3.5. Fie EL2 shows a pump that transfers a steady strenm of 35°API crude ail from an eil tanker to a relinery stoenge tank, boch fre surfas being open to the atmspbere. The effoctive kngth-lncluding fiting of the cummercial steel pipe is 6,000 E. The discharge at paint 4 is 200 a abeve the pump ezit, which is Ievel with the free arface of oil in the tanker. Hemever, heeane of an interveming hill, point 3 ls at a higher altitude then point 4. Lcones between points 1 and 2 mg be ignored. The erude oil has the following peoperties: p- 68 I/n; - 182 cP;…
Using the Hazen-Williams nomograph, determine the following:(a) The head loss (m/km) for a 600 mm diameter pipe with a flow of 0.20m3/s.(b) The flow rate for a 300 mm diameter pipe with a head loss of 10 m/km of pipeline.(c) The pipe diameter to carry a flow of 65 liters/s without exceeding a pressure loss of 86 kPa per kilometer of pipeline.
The three statements below all refer to standard single-barrel reverse flow cyclones used to remove particulate matter from air. For each statement, indicate whether it is True or False and explain your reasoning. a) If a cyclone has a collection efficiency of 25% for a specific-sized particle, then it can be expected always to have a collection efficiency of 50% if the particle size doubles, assuming all else remains constant. b) If a cyclone has a collection efficiency of 25% for a particle having a specified density, then it can be expected always to have a collection efficiency of 50% if the particle density doubles, assuming all else remains constant. c) To a single decimal place, the effective number of turns made in traversing a standard cyclone is always 37.7, independent of the cyclone size and air flow rate into the cyclone.
Wasterwater Engineering Civil engineering
A night fisherman notices that every night, at approximately 23h00, fish suddenly die in the river. The fisherman alerts you that there is a farmer illegally disposing sewage into the river upstream of the spot where the fish die. When you speak to the farmer, he insists that the sewage does not impact the fish because he discharges the sewage every day at 12h00. From further investigation, you find out that the river has a background BOD of 10.7 mg/L. The oxygen deficit just upstream from the farmer's discharge location is 3mg/L. You also find out that the deoxygenation rate coefficient ka is 0.2/day, and the reaeration rate coefficient k, is 0.6/day. a) Determine if the farmer's illegal sewage disposal is the reason the fish die every night by considering the critical point of the oxygen deficit. b) Determine the distance the discharge would need to be to match the critical point where the fish die if the river flow is 25 km/day and using the map below, suggest who the likely…