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During an investigation of a bridge collapse, Engineer Saad investigates another similar bridge, and finds it to be only marginally safe. He contacts the governmental agency responsible for the bridge and informs them of his concern for the safety of the structure. He is told that the agency is aware of this situation and has planned to provide in the next year's budget for repair. Until then, the bridge must remain open to traffic. Without this bridge, emergency vehicles such as police and fire apparatus would have to use an alternate route that would increase their response time by approximately twenty minutes. Saad is thanked for his concern and asked to say nothing about the condition of the bridge. The agency is confident that the bridge will be safe. What are your comments? Why?
A sewer pipe must be laid from a starting invert elevation of 650.73 ft at station 9 + 25 to an ending invert elevation of 653.81 ft at station 12 + 75. Determine the uniform grade needed, and calculate invert elevations at each 50-ft station.
A stack gas at 1.1 atmospheric pressure has a mixture below. what will be the change in partial pressure of carbon dioxide if the gas temperature is lowered from 2000 degrees K to 1000 degrees K
An engine cooling system initially contains 16 quarts of a mixture of water and antifreeze, which is 30 % antifreeze on a volume basis. if its desire to be removed and replaced with pure (100%) antifreeze?
Knowing that P=109.2 kips and Q=72.8 kips, determine (a) the components of the reaction at C, (b) the components of the force exerted at B on segment AB.
A 25-mm diamenter shaft is pulled through a cylindrical bearing as shown. The lubricant that fills the 0.3-mm gap between the shaft and bearing is an oil having a kinematic velocity of 8.0x10^-4 m^2/s and a specific gravity
The rigid block has a weight of 80 kip and is to be supportedby posts A and B, which are made of A-36 steel, and the post C,which is made of C83400 red brass.
Determine the normal stress and shear stress acting on the inclined plane AB . Solve the problem using the stress transformation equations. Show the results on the sectional element.
The true azimuth of line AB is 193 degrees 20'. The angle measured counterclockwise between line AB and another line AC is 205 degrees 10'. The true azimuth of line AC is:
A rigid beam (AB), 12 feet in length, with a point load of 9 kips (4 feet from A) is resting on two short steel rods (AC & BD). Diameter of Rod AC is 1 inch, Rod BD diameter is 2 inches.
A diver is planning to salvage a Spanish galleon located in 200 feet of water. He plans to use a diving suit that will be supplied with air from a hose (assume this to be amply sized) connected to a compressor that he will locate in his boat on the s..
Estimate the equivalent 18-kip single-axle load applications (ESAL) for a four-lane pavement (two lanes in each direction) of a rural interstate highway with a truck Count of 1000 per day (including 2-axle. 4-tire panel, and pickup trucks), an ann..
Discuss how relative motion is a critical issue in the midair refueling of aircraft. Would control of this process be with the pilot of the tanker or the aircraft being refueled
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