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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)
A fluid of density rho flows steadily downward between the two vertical, infinite, parallel plates. The flow is fully developed and laminar. Make use of the Navier Stokes equation to.
An overpass is being built over the PVI of an existing equal tangent sag curve. The sag curve has a 70 mi/h design speed, and G1 = -6%, G2 = +3%.
The discharge through a 6.0 ft wide rectangular channel is 200.0 ft3/s. Find the conjugate depths of the jump formed in such a channel if 3.5 ft of energy head is lost through it.
A sand sample has a porosity of 38% and specific gravity of solids of 2.66. Find the void ratio and wet unit weight in lb / ft3 if the degree of saturation is 35%.
Two particles start from the same point along the same straight line and at the same instant. The first particle travels with a constant velocity v and the second with a constant acceleration.
Assume that Santa weighs 300 lbs, visits 10 houses an hour and requires a 20 foot lift at each house, what is the average power that the system will use if it is perfectly efficient
In a given experiment it is determined that the pressure change (deltaP) between two points in a pipe is dependent upon the density(p) of the fluid, the diameter(D) of the pipe, and the velocity(V) of the pipe.
Steam at 500 kPa and 200 C is mixed adiabatically with cold water at the same pressure and 15 C to produce 1 kg/s saturated liquid water at 500 kPa. The rate of entropy generation in the surroundings is? in kw/K
A 100 mm diameter log is subjected to two equal loads equally spaced along its 450 mm length at 150mm intervals. The beam has an allowable flexural stress of 9 MPa and a much lower allowable shear stress parallel to the grain of 850 kPa
A piston cylinder contains 0.8kg of steam (water vapor) at 300 deg C and 1MPa absolute. The steam is cooled at constant pressure until half of the mass condenses.
A contractor wants to build a fill at his new construction site. He has two options for purchasing his borrow material. Site A has a soil with a unit weight of 2.5 kN/m3, a moisture content of 14% and a cost of $8 per cubic meter
Two water reservoirs A and B are connected to each other through a 40 m long, 2 cm cast iron pipe with a sharp-edged entrance. The pipe also involves a swing check valve and a fully open gate valve.
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