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Determine the carburizing time necessary to achieve a carbon concentration of 0.35 wt% at a position 2 mm into an iron-carbon alloy that initially contains 0.10 wt% C.
Groundwater has been contaminated with three chemicals: benzene (log Kow 2.13), pentachlorobenzene (log Kow 5.03), and naphthalene (log Kow 3.36). The aquifer (rs = 2.3 g/cm3; h = 0.4; foc = 0.02) h
The diameter of the sample and the standpipe were 9.8 cm and 0.75 cm, respectively. The water level in the standpipe was observed to fall from 60 cm to 45 cm in 12 minutes. Calculate: a. The hydraul
The performance functions of these three routes are: t1=50+0.2v1, t2=80+0.1v2, t3=120 + 0.05v3 t1, t2, t3 and are travel times in minutes; v1, v2, v3 are flows in number of trucks per day.
A rectangular reinforced concrete beam with dimensions b = 14in, d = 25in, and h = 28in is reinforced with three No. 10 bars. Material strengths are fy = 60,000 psi and fc prime = 5,0000 psi.
a wind tunnel is used to experimentally determine the lift force L and drag force D on a scale model of an aircraft. the bracket supporting the aircraft is fitted with an axial spring with stiffness
The beam is positioned such that the observer on the train measures an angle of 19 between the crossbeam and the floor of the train. At what speed would the train have to be traveling in order for a
The relative density of a sloped sand deposit is known to be 75%. Water is observed to be seeped through this slope at a rate such that the discharge velocity is 0.6 m/day. If the hydraulic conducti
A new chemical remediation tank is needed. Current technology tanks, which costs $150,000, MUST BE DRAINED AND TREATED EVERY TWO YEARS AT A COST OF $30,000; THE TANKS WILL LAST TEN YEARS, AND EACH W
air enters a turbine operating at steady state at 8 bar, 1127 C and exits at 1.5 bar, 347 C. The heat transfer from the turbine to its surroundings is 10 kJ/kg of air flowing through the turbine.
nighttime traffic on a single lane of rural highway is light, with a flow of 40 vehicles/hour , and is well described by a Poisson arrival process. A racoon dashes across the road, without looking a
Iron and vanadium both have the BCC crystal structure, and V forms a substitutional solid structure in Fe for concentrations up to approximately 20 wt% V at room temperature.
What ground distance will be measured if grid distance is 2158m and Orthometric height = 850m, Scale factor Sf = 0.9999943, Geoidal separation N = 27m, Ra = 6371km
The grid Az of a line is 142° 25' 18". If the convergence angle is 1° 05' 34" and the arc to chord correction is 2.1", what is the geodetic Az of the line
What are the SPCS83 coordinates and convergence angle for a station in the Colorado Central zone with geodetic coordinates of 39° 44' 40.74141"N, 105° 00' 07.48466"W
A maximum flow rate of 6 CFS is available for a river model. This corresponds to 30,000 CFS for the prototype. What is the scale of the model in terms of the prototype size
The spillway section is 40 feet high, its crest length is 60 feet and the maximum discharge is 3,000 CFS when the head on the crest of the spillway is 5 feet. Using a model scale of 1:10, calculate
A rapid-mixing basin is to be designed for a water coagulation plant, and the design flow for the basin is 4.0 MGD (million gallons per day). The basin is to be square with a depth equal to 1.25 tim
A standard five-day BOD test is run using a mix consisting of four parts distilled water and one part wastewater (no seed) the initial DO of the mix is 9.0 mg/l , and the do after Five days, determi
incoming wastewater , with BOD5 equal to about 200mg/l is treated in well-run secondery treatment plant remove 90 percent of the BOD. you are to run five-day BOD test with a stander 300-ml bottle ,
knowing that both members are in compression and that the force is 15 KN in member A and 10 KN in member B, determine by trigonmetry the magnitude and direction of the resultant of the force applied
Phenol undergoes a first-order decay reaction in the CSTR with rate constant, k = 0.50 hr^-1. The current industrial pre-treatment permit for Phenol is 20 mg/l. The permit limitation may be changed,
The uniform load has a mass of 400 and is lifted using a uniform 40- strongback beam and four ropes. determine the tension in each rope
A year after buying her car, Anita has been offered a job in Europe. Her car loan is for $15,000 at a 9% nominal interest rate for 60 months. If she can sell the car for $12,000, how much does she g
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. assume uniform velocity distribu