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1.A 10-mg quantity of phenanthrene (MW = 178) is added to a 1-L flash containing 500 mL of air and 500 mL of water. Predict the aqueous phase equilibrium concentration of phenanthrene at 25*C if the values for this compound are Cs = 1.1 mg/L, P^v = 1.6 x 10^-7 atm, KH = 4.0 x 10^-5 atm*m^3/mol, and logKow = 4.52.
2.A flow of 600cfs is measured at a depth of 3.4 ft in trapezoidal channel with bottom width of 25ft and side slopes of 3:1(h:v). The channel reach has a slope of .002. Estimate the channel roughness.
3.Compressed nitrogen (140 lbm) is stored in a spherical tank of diameter D = 2.5 ft @ temp. of 77 degrees Fahrenheit . what is the pressure inside the tank? if the max allowable stress is 30 ksi, find the minimum theoretical wall thickness.
The area shown is revolved about the x axis to form a homogeneous solid of revolution of mass m. Using direct integration, express the mass moment of inertia of the solid with respect to the x axis in terms of m and h
What is the pressure drop for water at 60 degrees F flowing through 12in schedule 40 pipe at a rate of 500gal/min over a distance of 100 feet.
Describe the use of productivity models for estimating land productivity. Provide details about various attributes that can be used and how the model is developed . Examples can be used to demonstrate model workability.
An L2 steel strap having a thickness of 0.125 in. and a widthof 2 in. is bent into a circular arc of radius 600 in. Determine the maximum bending stress in the strap.
For each of the two cases below, determine the water pressure, pressure head, elevation head, and total head at points A, B, and C. Please solve the problem using: (a) the upper reservoir level as the datum
A rectangular concrete channel 10 m wide has a bed slope of 1 m/km and surface roughness equivalent to a Manning n of 0.02. It is proposed to use a hump on the channel bed for the purpose of flow measurement. If the maximum discharge is 150 m3/s:
A gas has a volume of 2.0 liters, a pressure of 1.2 atm, and a temperature of 30 degrees Celsius is heated to 60 degrees Celsius and compressed to a volume of 1.5 liters. What is the new pressure
To prevent this high compression load from buckling the copper pipe, a solid steel support of 2 1/2 inch diameter is placed inside the copper pipe. The copper pipe is 8.000 inches long. The steel support is 8.0001 inches (exactly 1 mil = 1/1000 in..
A wastewater treatment plant uses an activated sludge process for secondary treatment of 0.300 cubic meters / second of primary effluent. The mixed liquor has a concentration of 2,100mg VSS/L, and the RAS concentration is 10,000mg VSS/L.
A light spring of a constant k=90.0 N/m is attached vertically to atable. A 2.00g balloon is filled with helium (density 0.180 kg/m^3)to a volume of 5.00m^3 and is then connected to the spring, causingit to stretch. Determine the extension distance L..
At that time, there is no more fuel in the rocket engine and the rocket continues upwards in free fall (g=0 ft/sec/sec). (a) How high will the rocket reach before it begins to fall back to the campus
An 80 kg astronaut took his bathroom scale (a spring scale) and a beam scale (compare masses) to the moon where the local gravity is g=1.67 m/s^2. Determine how much he will weigh
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