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Two materials (wrought iron, ks = 0.046 mm, and galvanized iron, ks = 0.15 mm) are being considered for a new pipeline. The expected discharge is 0.15 m3/s. Both the head loss and cost are sought for. Wrought iron pipe costs 5 cents more than the galvanized iron pipe for very meter length of the pipe. Determine the tradeoff between the cost and the energy head per meter length for pipe diameters of 200 mm and 150 mm. (v = 1.141 x 10-6 m2/s)
What is the vapor pressure of carbon dioxide in the bottle before it is opened (i.e., when it is at equilibrium) assuming no other ions are present besides those related to CO2 and water
The flow rate of water flowing in a 3m wide channel is to be measured with a sharp-crested triangular weir 0.5m above the channel bottom with a notch angle of 60°. If the flow depth upstream from the weir is 1.5m
The coefficients of static and kinetic friction are 0.3 and 0.2, respectively, between each of the plates and between plate A and the ground. Determine the acceleration of each plate.
A short 60mm diameter circle bar is made of material for which the maximum safe compressive strees is 80 MPa and the maximum safe shearing strees is 30 MPa.
Under these conditions flow is expected to be turbulent, but for a clean air, very smooth enterance (with guided vanes) to the tube and no tube vibration, it may be possible to maintain laminar flow.
The dry weight of a core is 28.20 gm. When saturated with a brine having a density of 1.15 gm/cc, the weight increases to 31.50 gm. Calculate the apparent porosities if the matrix is 1) quartz or 2) calcite.
Discuss bracing types of buildings with real-life example. Provide photograph or sketch for each type of bracing.
A manometer of water reads a height of 20cm at a temperature of 15 degrees C. If the diameter of the manometer tube is 1mm, what is the static height reading
At what depth will water flow in a 10 m wide rectangular channel, if n=0.01, S=0.0015 and Q=9m^3/s
The 3.5mg engine is suspended from a 500 kg spreader beam and hoisted by a crane which gives it an acceleration of 4m/s^2 when it has a velocity of 2m/s. determine the force in chains AC and AD during the lift.
Biological treatment processes for wastewater can be categorised as dispersed growth and attached growth systems. Discuss the advantages and disadvantages of attached growth systems over dispersed growth systems.
determine the stresses in the steel and concrete under the service loads
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