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The Caroselli Dam on the Pawcatuck River is 10 ft high, 90 ft wide, and sharp edged. The Coakley Company uses this head to generate hydropower electricity and wants more head. They ask the town for permission to raise the dam higher. The river above the dam may be approximated as rectangular, 90 ft wide, sloping upstream at 12 ft per statute mile, and with a stony, cobbled bed. The average flow rate is 400 ft3 /s, with a 30-year predicted flood rate of 1200 ft3 /s. The river sides are steep until 1 mi upstream, where there are low-lying residences. The town council agrees the dam may be heightened if the new river level near these houses, during the 30-year flood, is no more than 3 ft higher than the present level during average flow conditions. You, as project engineer, have to predict how high the dam crest can be raised and still meet this requirement.
Air undergoes a polytropic expansion process in a piston-cylinder assembly from 75 psia and 300 F to 15 psia. Employing the ideal gas model with constant specific heat ratio k
Refer to Figure 13.14 (site grading plan). A grade stake was set near the middle of Lot #26, and the stake-top elevation was determined to be 84.15 m. Compute the cut and fill at each lot corner.
A pin-connected truss is loaded and supported as shown. Each aluminum member has a cross-sectional area of A = 2.6 in.2. Assume a = 4.75 ft and b = 5.70 ft. If the normal stress in each member must not exceed 60 ksi, determine the maximum load Pma..
Consider the 2 wooden beams attached in the given image. Calculate the moment around point A for ?=30. All relevant dimensions are shown.
A jet aircraft is flying in a standard atmosphere at an altitude of 4,000 m at 900 km/hr. The frontal intake area of the jet engine is 0.80 m2. The engine exhaust area is 0.56 m2. The temperature of the exhaust gas is 120°C.
What is the minimum energy necessary (in kJ) to compress 1.0 kg of saturated water vapor at 1 bar to a pressure of 60 bar in a perfectly insulated vessel
For determining the centroid of the area, two square segments are considered; square ABCD and square DEFG. What are the coordinates (x, y ) of the centroid of square DEFG?
Electromagnetic radiation may be treated from the classical or the quantum mechanical perspectives. Briefly compare these two viewpoints.
Have you ever been frustrated because you could not get a container of some sort to release the last bit of its contents? The article "Shake, Rattle, and Squeeze: How Much Is Left in That Container?" (Consumer Reports, May 2009: 8) reported on an inv..
Two similar cylindrical polished bars weighing 5.00 N each lie next to one another in contact.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 t..
A bucket full of water is to be rotated in the vertical plane. What minimum angular velocity, in rad/s, is necessary to keep the water inside if the rotating arm is 120 cm
A 3-point bending test is performed on a 10 mm diameter rod of Silicon Carbide. The distance between the supports is one foot. If the load at fracture is 10,000N, what is the flexural strength of the rod
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