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An external force F = F0 sin ωt is applied to the cylinder as shown. What value ωc of the driving frequency would cause excessively large oscillations of the system?
Assuming an average daily water demand of 400 L/(person. day) during winter months and 700 L/(person. day) during summer months, calculate the annual water demand on the water supply at the end of the design period.
What is the relation between reflection and transmission coeffients of a sea wall
What is the mathematical expression for Centripetal Acceleration? Please describe the terms in your expression and give a brief summary of what Centripetal acceleration is.
A third similar bar is placed on the other two in the groove between them. Neglecting friction, what horizontal force on each lower bar is necessary to keep them together.
A rectangular gate 3ft wide is used as a partition to separate glycerin and water. A stop is located on the floor of the water side of the gate. Calculate the force required to hold the door losed.
A 3m deep layer of clay is underlain by impervious rock. An extensive area of fill is to be placed over the site. How long would it take for the clay layer to achieve 90% of its total final settlement.
Two materials (wrought iron, ks = 0.046 mm, and galvanized iron, ks = 0.15 mm) are being considered for a new pipeline. The expected discharge is 0.15 m3/s. Both the head loss and cost are sought for. Wrought iron pipe costs 5 cents more than the gal..
diameter spaced longitunally every 6 in. Knowing that the average allowable shearing stress in the bolts is 10.5 ksi, determine the largest allowable vertical shear in the beam.
The truss shown below is a statically determinate model of a braced frame with two single diagonal braces and design lateral loads.(a) Use equilibrium equations of the entire stucture to find the external reactions. Draw a free body diagram of the st..
A model of a submarine, at 1:15 scale, is to be tested at 0.8 ft/s in a wind tunnel at standard at mospheric pressure, while the prototype will be operated in seawater. Both the air and water are at 10 C (50 F).
Battered piles are used on many construction projects as a permanent part of the element being constructed. Does this construction method have any play in the construction of a temporary earth retention system?
For the fully developed flow of water in a smooth 0.15-m pipe at a rate of 0:006m3/s, determine the thickness of a. the laminar sublayer; b. the buffer layer; c. the turbulent core
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