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The steel bar (problem Shear 10) (E = 200 GPa, alpha = 11times10-6 / degree C ) is of rectangular cross-section (4cm times 10cm) and is to be bolted on a structure by 10 bolts on each side; the diameter of each is 3.5cm. Due to an error, the length L shown was 1.795 m instead of 1.80 m, thus there is a gap of 0.5 cm, which makes it difficult to bolt the bar on the structure. The engineer suggests the bar is heated up by - Delta? in order to close the gap. (a) Find the Delta? required to close the gap. After the gap is closcd and the bar is bolted, the bar is brought back to its original temperature. (b) Find the shear stress on each bolt. (c) Find the bearing stress on the bar.
A 500 L (132 gal) tank contains 255 mg/L 2,4,6-trichlorophenol dissolved in trichloroethylene (TCE). What is the 2,4,6-trichlorophenol concentration in ppm Assume the temperature of the system is 20 degrees C.
What are the quantitative measures of reliability (discuss measures for hardware, software, personnel, facilities, and data)?
A four-lane freeway (two lanes in each direction) is on mountainous terrain with 11-ft lanes, a 5-ft right-side shoulder, interchange spacing of one every 10 miles, and a 60-mi/h base free-flow speed.
Estimate the daily emissions of sulfur dioxide, nitrogen oxides as NO2, and particulate matter from an industrial steam-generating plant equipped with a dry-bottom pulvurized-coal firing system.
assume hydrostatic uplift varies uniformly from full hydrostatic head at the heel of the dam to zero at the toe. consider 1m length of dam.
Why is the ‘time value of money' important for the evaluation of engineering projects? Provide at least one practical example to support your view (max 2 pages).
Online professor's response to: Probability problems, A very rich investor has a small amount of spare cash which she wishes to invest. She has four options to choose from.
A concrete box girder bridge has the rectangular x-section. The box is prismatic and considered thin-walled. It span is L=48m and simply supported at points A,B,C and D. The supports are assume to be able to transfer tensile forces.
A falling-head permeability test was carried out on a clay soil of diameter 100 mm and length 150 mm. In 4 minutes the head in the standpipe of diameter 5mm dropped from 680 to 350 mm.
Two immiscible fluids are in contact. Fluid I is denser and is also well mixed. The concentration of species a is cao everywhere within this fluid and the temperature in fluid I is held constant at To.
Plot the ground level concentration of sulfur dioxide as a function of distance from the stack and determine the maximum ground level concentration at both with and without air pollution control and the distance from the stack where the maximum co..
a rectangular clarifier with a length:width ratio of 3:1 receives a flow of 850m3/day. the clarifiers depth is 4.0m and the detention time of the water inthe clarifier is 2.4 hrs, what are the surface overflow rate and the horizontal flow through ..
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