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The dimensionless Henry constant for trichloroethene (TCE) at 25°C is 0.4. A sealed glass vial is prepared that has an air volume of 4 mL overlying an aqueous volume of 36 mL. TCE is added to the aqueous phase so that initially it has an aqueous phase concentration of 100 ppb. After the system equilibrates, what will be the concentration (in units of pg/L) of TCE in the aqueous phase?
Cartridges cost $120 each and require 2 weeks to obtain from the vendor. Jill uses (Q,r) policy to control inventory of cartridges. You can assume that there are 50 working weeks in a year.
Each propeller of the twin-screw ship develops a full speed thrust of 300 kN. In maneuvering the ship, one propeller is turning full speed ahead and the other full speed in reverse. What thrust P must each tug exert on the ship to counteract the e..
A container with volume 0.2 m^3 holds oxygen and has gages showing readings of 70°C and 25 bars. Calculate the amount of oxygen (mass and moles) in the container if the atmospheric pressure is 1 bar.^3
The coefficient of kinetic friction between block A and the inclined plane is mu_k = 0.11 . The angle of the inclined plane is given by theta = 45. Neglect the weight of the rope and pulley. Part A - Normal Force Acting on Block A Determine the ma..
A grit chamber is designed for a flow-through velocity of 0.30 m/s, a depth of 0.9 m, and a length of 10.5 m. If inorganic particles have a specific gravity of 2.65, estimate the diameter of the largest particle that can be removed 100% at 20 degrees..
The width of a lake is 16 km (it is a flat plane tangent to the radius of the sphere). How far does a horizontal plane depart from a level surface if the earth is a sphere with r=6371km
Write a particular specification for a cut-to-fill earthworks operation for a large sports field. Use the SABS 1200 format. You will have to establish realistic values for the density requirement of the fill, quality requirements and tolerances, m..
A 50 meter wide rectangular channel is carrying a flow of 250 m3/s at a flow depth of 5 meters. To produce critical flow in this channel, determine
What would be the Horizontal and vertical component from this acting force see diagram
The velocity of a particle traveling along a straight line is v=(3t^2-6t) ft/s , where t is in seconds. if s=4ft when t=0 determine the position of the particle when t=4s what is the total distance during the time interval t=0 to t=4s
The mass flow rate of steam into a steam turbine is 5 kg/s . The turbine has a heat loss of 5 kj/s. if the velocity of the refrigerant is to be limited to 2 m/s, what is the minumum allowable pipe diamter
how many strands will be required to make the pre-stressing cable.
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