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The block of weight W = 100 lb is suspended by two springs each of stiffness k = 200 lb/ft and is acted upon by the force F = 75 cos 15t lb where t is the time in seconds. Determine the amplitude X of the steady-state motion if the viscous damping coeffi- cient c is (a) 0 and (b) 60 lb-sec/ft Compare these amplitudes to the static spring deflection δst.
A sample of undisturbed soil has a dry weight of 10 lb and volumen of 1 ft^3. If the specific gravity of the soil solids is 2.65, determine the void ratio and the porosity.
A pipeline 1200 ft long and 8 in. in diameter has at its inlet point 75ft of available hydraulic energy with respect to the reference level. The velocity in the pipe is 5 fps: the pressure at its end is 12psi.
design a horizontal curve for a two-lane road. The road has 12-ft. lanes. Due to expansive excavation, it is determined that a maximum of 34 ft. can be cleared from the road's centerline toward the inside lane to provide for stopping sight distanc..
Traffic signals were installed at an intersection involving two one-way streets. Suppose 75% of the vehicles will decelerate when they see the amber light, whereas 20% will accelerate and 5% are "indecisive" and simply continue with the same speed..
shown in the figure are a mast and a portion of the rigging of a schooner. members cd and ef lie in the same plane.
A rectangular channel carries a discharge of 2.00 m3/sec per meter of channel width over a weir crest that is 1.4 m in height. The energy grade line upstream of the weir measure 2.7 m above the channel bottom
A fluid of density rho flows steadily downward between the two vertical, infinite, parallel plates. The flow is fully developed and laminar. Make use of the Navier Stokes equation to.
an open rectangular channel is 50 feet wide flowing at a depth of 5 feet and is carrying 1000 cubic feet per second.
A landfill area of (150 m x 100 m) is available for handling 25 years' municipal solid waste (MSW) for a town of 5,00,000 people. estimate the landfill lift in one year
What is the average velocity of the body for the time interval, t = 0 and the time that it crosses the X-axis?
To what extant does the transformers dissipation power increase with rising current?
what is the engineering ethics case related to civil engineering with reference and discuss all the engineering ethics issues which covered the "Engineering etics concepte and cases?
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