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its desired to produce 5 cubic yards of cencrete with a ratio of 1:1.8:3.5 of cement, snd, and gravel what are the required amounts of components if 5.5 gallons of water per sack of cement is to be used? assume the free miosture contents of the sand and gravel are 3% and 0.75% respectivley. The specific gravities of cement, sand, and gravel are 3.15,2.65,and 2.65 respectivley give the answer for cement in sacks, the sand, and gravel on pounds and the water in gallons.
Compare the reactor volume required to achieve 95% efficiency for Completely Mixed Flow Reactor (CMFR) and a Plug Flow Reactor (PFR) for the following conditions. steady-state, first-order reaction, flow rate = 14m3 / day.
The total phosphate concentration (TOTPO4) in a river is 3.2 mg/L as P. The pH of the river is 7.8. What are the concentrations of H2PO4- and HPO42-
A flocculation/sedimentation combination basin in a conventional drinking water treatment plant is to be constructed of cast-in-place reinforced concrete. The horizontal flow rectangular basin will be located in New Jersey, USA.
A PVC pipe with a diameter of 30 inches will carry a flow of 20 cfs. the bottom slope is 0.005 and the roughness coefficient is 0.015. determine the normal depth, critical depth, velocity and the froude number.
A closed cylindrical tank filled with water has a hemispherical dome and is connected to an inverted piping system. The liquid in the top part of the piping system has a specific gravity of 0.68.
An open rectangular channel is 50 feet wide, flowing at a depth of 5 feet, and is carrying 1000 cubic feet per second. What is the maximum step height than can be placed into the flow without disturbing the upstream depth, without acting as a chok..
A soil sample was taken from a proposed cut area in a highway construction project and sent to a soils laboratory for a compaction test, using the Standard Proctor compaction procedure. Results of the test are as follows:
The flowrate through an open channel with a slope of 2 % is calculated using Manning's equation at 100 cubic feet per second. If the slope of the channel is doubled to 4%
A trapezoidal channel is carrying water at a normal depth of 5.2 ft, the channel has a bottom width of 10 ft and side slopes of 2 H to 1 V. It is running on a slope of 0.005 ft/ft. What will be the shear stress in lb/ft^2 exerted on the channel be..
Assume that bonding atoms touch one another, that the angle between adjacent bonds is 109.5, and that each atom internal to the unit cell is positioned a/4 of the distance away from the two nearest cell faces.
At the end of 15 years, the first motor will have a salvage value of $50 and the second motor will have a salvage value of $100. consider the MARR to be 8%. (note : 1HP=0.7457 kw). Determine which motor should be installed based on the PW criterio..
An element of aluminium in a form of a rectangular parallel pipe has a length 'a' along the x axis of 5.5 in, a length 'b' on the y axis of 4.5 in. Determine the maximum shear stress in the material,the change in length.
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