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1. In geohydrology the unit m/d is often used to measure the hydraulic conductivity k. What is the relation with the SI-unit m/s?
2. A certain soil has a hydraulic conductivity k = 5 m/d. This value has been measured in summer. In winter the temperature is much lower, and if it is supposed that the viscosity µ then is a factor 1.5 as large as in summer, determine the value of the hydraulic conductivity in winter.
Determine the rated value of the power coefficient CP and compare this with the value at the Betz limit. Assume the air density ρ = 1.2 kg/m3
gaseous hydrogen at 10 bars and 27 degrees celsius is stored stored in a 100 mm diameter spherical tank having a steel
a carnot heat engine using 1 kg of air has the following conditions isothermal heat addition beginning at 15 mpa and
a hydraulic press is powered by a remote high-pressure pump. the gage pressure at the pump outlet is 22 mpa whereas the
Determine the probable production of the dragline. There are 60,000 bcy of material to be excavated. How long will the project require?
Referring to Figure 2.21, prove Equation 2.48 for the angle of incidence. (Hint: use direction cosines of the sun-ray vector and a vector normal to the tilted surface to find the angle between them. The dot product of two unit vectors gives the co..
Review one of the references at the end of this chapter, or choose another reference, and briefly describe the many forms of construction management that are currently being used in the engineering and construction industry.
an especially violent lightning bolt has an average current of 1.37 103 a lasting 0.125 s. how much charge is delivered
The packages are placed on the belt so that they are in contact with each other and at rest. Determine which, if any, of the packages will move and the friction force acting on each package
For the turbine-compressor arrangement of Problem 6.164, determine the exergetic efficiency for (a) the turbine, (b) the compressor, (c) an overall control volume enclosing the turbine and compressor. Let T0 5 300 K.
a rigid tank is connected by a valve to a supply line where refrigerant at 1.4 mpa and 100 degrees celsius flows
consider the piston and cylinder arrangement indicated in the figure in which a frictionless piston with a
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