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A two dimensional flow field is defined by u = x^2 - y^2 and v = -2xy. Is the flow rotational or irrotational?A speedboat on hydrofoils is moving at 20 m/s in a freshwater lake. Each hydrofoil is 3 m below the surface. Assuming, as an apporximation, frictionless, incompressible flow, find the stagnation pressure(gage) at the front of each hydrofoil. At one point on a hydrofoilm the is -75kPa(gage). Calculate the speed of the water relative to the hydrofoil at this point and the absolute water speed.
A minimum contact time of 30 min is required to reduce the pathogen concentration from 100 pathogens/L to below 1 pathogen/L through a first-order decay process. You plan on treating water at a rate of 1,000 gal/min.
If the ball strikes the side of the building 2s after being thrown, at what height above the base of the building did the ball strike the building? What is the velocity of striking?
A foot valve for a pneumatic systemis hinged at B. Knowing that a=28degrees, determine the moment of the l6-N force about point B by resolving the force into horizontal and vertical components
Assume that there is only one phase present and that the formation is homogeneous, but anisotropic. Further, assume that viscosity, formation volume factor, and the areas available for flow are constant spatially. Last, assume 3-D flow using x, y,..
Suppose a person invests a total of $10,000 in two accounts. One account earns 8% annually, and the other earns 9% annually. If the total interests earned from both accounts in a year is $860, how much was invested in each account?
Calculate the largest tolerable internal crack length for a 7075-T651 aluminum alloy component that is loaded to a stress one-half of its yield strength without catastrophic fracture. For the alloy, the plane strain fracture toughness is 24 and yi..
A zone in the CBD is projected to contain 1,525,000 ft2 of residential space; 3,675,000 ft2 of service establishments; and atotal retail activity floor area of 2,100,000 ft2.
It is desirable to produce a copper-nickel alloy that has a minimum noncold-worked tensile strength of 390 Mpa and a ductility of at least 40% elongation. Is such an alloy possible If so, what must be its composition
In order to move a wrecked truck, two cables are attached to the truck at A and pulled by winches B and C as shown. Determine the components and magnitudes of the vectors AB and AC
The concentration of Chemical Oxygen Demand (COD) in the effluent from this system is 25 mg L-1. The growth rate of the organisms in this case is 0.9 days-1. The activated sludge tank has a volume of 50 m3 and the flow rate through it is 500 m3 da..
Detail description of Staircase with it's plan, design criteria about it for various types of buildings,standerd dimensions of rise & going of stair which is applicable in civil engineering works
How many hours should it take an articulated wheel loader equipped with a 4 yd3 bucket to load 3,000 yd3 of gravel from a stockpile into rail cars if the average haul distance is 300 feet one way
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