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Design a hollow steel shaft with an inside diameter 1/3 that of the outside diameter. The shaft transmits 200 kW at a speed of 20 Hz. The allowable shearing stress is 55 MPa, and the allowable angle of twist is 1 degree per meter of length.
one of the wells pumps at a rate of 1240 m3/day. the second well pumps at 850 m3/day.if the aquifer has a transmissivity of 2000 m2/day and a storage coefficient of 4x10^-4, when would the wells start interfering with each other.
A beryllium copper wire having diameter of 1-50 mm and length of 40mm is used as a small torsion bar in an instrument. determine what angle of twist would result in the wire when it is stressed to 250 mpa.
Calculate the surface area (m2), diameter (m), volume (m3), and hydraulic retention time of a 3 m deep circular, primary clarifier that would remove 50 percent of suspended solids. Assume the surface overflow rate (SOR) used for design is 60 m3/m2-..
a moist soil has a total unit weight of 110 pcf and a water content of 6 percent. assuming that hte dry unit weight is to remain constant , determine how much water , in gallons per cubic yard, must be added to increase the water content to 12 per..
WHat volume of sludge must they dispose of each year if their sand drying beds yield a solids concentration of 35%
A hydraulic cylinder must produce a minimum force of 3 kN for a pressure of 800 kPa. What minimum diameter piston is required
Write out the continuity and momentum equations that govern the surge travelling downstream. (Note: assume that the surge velocity exceeds the water velocity)
determine the horizontal spacing of the vertical drains if the drains are installed in triangular grid to reach 90% of primary consolidation in 1.5 years after the commencement of fill placement
What is the specific volume of superheated steam at 42 psia and 340 degrees fahrenheit
If A and B are both made of wood and are 3/8 in thick, determine to the nearest ¼ in the smallest dimension h of the support so that the average shear stress does not exceed \tauallow = 300 psi.
a 6 inch soil cement base and an 8 inch crushed stone subbase, which truck will cause more pavement damage?(assume drainage coefficients are 1.0)
A 300 mm diameter pipe is placed in a 3 m deep rectangular trench that is 0.60 m wide. The trench is backfilled with clay that has a bulk unit weight of 18.8 kN/m3. Compute the dead load due to backfill that the pipe must support.
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