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Footings for a structure are to be built beneath a basement slab on a clay at a depth of 20 ft. below present ground level. Representative consolidation tests on the soil produce a 0.043 slope of recompression curve. The groundwater table is 15 ft. below the ground surface. The soil has a unt weight of 120 pcf. The soil-void ratio is about 0.87. If the average bearing pressure on the footings is 2,600 psf., estimate the settlement of 10 ft. and 5 ft. square footings. Also , what is the factor of safety for the footings against bearing failure if the clay soil has an unconfined compressive strenght of 3,600 psf? The back of the book says that for a 5 ft. footing, the estimated settlement= 1.72 in. And for a 10ft. footing, the estimated settlement= 2.42 in. Also it says the Factor of Safety at least for the 5 t. footing is FS=5.554.
Consider a model of a bone with a cemented prosthesis, where the outside radius of the bone is ro, the radius of the medullary cavity is rm, and the radius of the prosthesis is rp.
At 500ºC the diffusion coefficient for Zn in Cu is 4.0E-18 m2/s. The activation energy for diffusion of Zn in Cu is 189 kJ/mol. Therefore at 700ºC, the diffusion coefficient for Zn in Cu is
Atmospheric pressure is101.3 kPa (or else 14.69 psi). You take a vessel, and pressurise it to 350 kPa (or 50.75 psi) above the atmospheric pressure, and connect pressure gauges to the vessel, calculate What is the gauge pressure? What is the absolute..
a flying wing has a swept symmetric airfoil with a planform area of 3700 sq ft a root cord at the airplane centerline
a machining-center spindle and tool extend 10in. from their machine-tool frame. calculate the temperature change that
A ski lift has a one-way length of 1495m and a vertical rise of 285 m. The chairs are spaced 23 m apart, and each chair can seat three people. The lift is operating at a steady speed of 12 km/h.
an adiabatic control volume with steam as the working fluid operates at steady flow conditions with the inlet state of
(a) determine how much ice has melted to bring the temperature of the beverage to equilibrium with the ice/water. (b) Determine the final equilibrium temperature
0.1 kg of propane is contained within a piston-cylinder assembly at 0.2 mp initially with a specific internal energy of
A frictionless piston-cylinder device contains 2 kg of air at 100 kPa and 300 K (state 1). Air is now compressed until it reaches a final temperature of 360K (state 2). During the process, the pressure of the air inside the piston-cylinder device var..
A power cycle operates between hot and cold reservoirs at 500 K and 310 K. At steady state the cycle develops a power output if 0.1 MW. Determine the minimum theoretical rate at which energy is rejected by heat transfer to the cold reservoir in MW
an axially loaded brass strut hinged at both ends is 1m long and is of a square cross-section of sides 20mm. what
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