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A 24-in.-wide by 0.100-in.-thick by 140-in.-long steel sheet is to be formed into a hollow section by being bent through 360° and having the long edges welded (i.e., butt-welded) together. Assume a cross-sectional medial length of 24 in. (no stretching of the sheet due to bending). If the maximum shear stress must be limited to 18 ksi, determine the maximum torque that can be carried by the hollow if (a) the shape of the section is a circle. (b) the shape of the section is an equilateral triangle. (c) the shape of the section is a square. (d) the shape of the section is a rectangle measuring 7.2 x4.8 in.
The beam ABC of length L has two different moments of inertia (2I in AB, I in BC) and a constant elastic modulus E. It is fixed at point A has a roller support at point B and a load P at C. a. Sketch the deflected shape of this beam.
Develop an estimate of the volumetric flow rate of air that will be required for aeration of the mixed liquor in an activated sludge system.For this calculation, assume that the (ultimate) CBOD is 200 mg/L and (ultimate) NBOD is 50 mg/L.
If a watershed of drainage area 100 mi^2 has abstractions of 2.5 in/hr, what runoff volume will show up in the nearby stream in addition to baseflow for a rainfall of 5-hr duration with an intensity of 4 in/hr
Investigate the possibility of environmental problems that faced by the area of disaster.
A car collided with a telephone pole and left 20 ft skid marks on the dry pavement. Based on the damages sustained, an engineer estimated that the speed at collision was 15 mph. If the roadway had a +3% grade, calculate the speed of the car at the..
water flows into a weigh tank for 30 minutes. Calculate the increase in weight of the tank, if the discharge is 1.5 ft^3/s. The temperature is 50 F.
Air can be assumed as a di-atomic ideal gas. Find the final temperature and the amount of work ( in kW) required for air compression at a rate of 100 mol/s , from an initial condition of 1 bar an 25 C to 10 bar; for the following ways:
There are many parallels between the industrialization of the United States after Reconstruction and the modernization of the American workforce in the last twenty to thirty (20-30) years as it transitions from industry to a service-oriented econo..
If an additional 11ft lane is added (each direction) and all other factors stay the same, what will be the new level of service?
Write a paper on steel sustainability.
Reciprocal leveling gives the following readings in feet from a setup near A: on A, 2.071; on B, 8.254, 8.259 and 8.257. At the setup near B: on B, 9.112; on A, 2.926, 2.930 and 2.927. The elevation of B is 1099.600. Compute the disclosure and ele..
To satisfy desige limitation it is necessary to determine the effect of the 2- kN tension in the cable on the shear tension and bending of the fixed I-beam.
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