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An experiment was conducted to determine the hydraulic conductivity of an artesian aquifer. The piezometric heads at two points 150m apart were found to be 55 m and 48.5 m above a datum. A tracer injected into the first piezometer was observed after 32 hours in the second well. A test on porosity of a sample of the aquifer shows that ? = 24%. What is the hydraulic conductivity of the aquifer? Suggest what the aquifer material may be and verify that your solution holds true. Take the subsurface temperature as 15°C.
A sample of 10 television tubes produced by a company showed a mean lifetime of 1200 hours and a standard deviation of 100 hours. Estimate (a) the mean, (b) the standard deviation of the population of all television tubes produced by this company.
A simple truss with joint detail is shown at the left. determinethe required diameter of the pin at joint B if a factor of safetyof 1.8 with respect to shear yielding is required, and the pn is tobe made of steel having shering stress of 145 MPa
In what direction did the cue ball move after the collision? What percentage of its kinetic energy did the cue ball impart to the eight ball?
simply supported beam l1l2 m long carries a point load gk a kn qk b kn at mid-span and its self-weight with fire
An orifice meter was calibrated for dry air at T=90 F and P=1.3 atm. The calibration data are as follow: dp(inches of water): 0,0.5,1.0,2.0,3.0,4.0,5.0 Q(ft^3/minute): 0,2.0,3.0,4.2,5.0,5.5,5.8
What is the porosity of a sphere of 1 ft diameter packed inside a cube of 1 ft on each edge. What if the spheres are six inches in diameter. What if the spheres are one inch in diameter.
The shift in the oxygen-hemoglobin dissociation curve with pH and PCO2 provides more oxygen available to tissues. As an example, consider the oxygen uptake by muscle tissue. The blood flow rate is 1 L/min under resting conditions.
The steel rails of a continuous, straight railroad track are each 60 ft long and are laid with spaces between their ends of 0.25 inches at 70 degrees F. At what temperature will the rails touch end to end
In older houses one will often find steel waterpipings whereascopper tubing is now generally used. While carrying out renovationsplumbers often interconnect the steel pipings with Copper tubings.Is this a sound practice? Explain.
a round steel alloy bar with a diameter of 0.75 in and a gauge length of 3.0 in was subjected to tension, with the results shown in the accompanying table. using a computer spread sheet program, plot the stress-strain relationship.
Assuming the following equation represents the true distribution in the vertical, determine the actual distance below the surface at which the velocity, u, equals the depth-averaged velocity, U.
Determine the flow rate of water (20 degrees celcius) that will cause a pressure drop of 17250 N/m^2 in 350m of horizontal, cast-iron pipe (d=60cm). assume minor losses are negligibe
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