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Multi-strand steel tendons are used to manufacture prestressed hollow core concrete floor slabs. The form bed for the slabs is 125 m long. The tendons have a yield strength of 1860 MPa and a cross sectional area of 98.7 mm2. A hydraulic jack is used to prestress the tendons to 50% of their yield strength prior to placing the concrete. Determine the total stretch of the prestressing tendons. Assume E = 200000 MPa.
You need to prepare a paper on the importance of transport planning. Identification of the full range of possible impacts on the natural and socio-economic environment - Evaluation and quantification of these impact.
What model would more appro-priately describe the future behavior of this population?
A sealed insulated room contains 90 m^3 air at 12 C and 100 kPa. A container with 45 kg of water at 95 C is placed in the room. After heat transfer between the air and water, thermal equilibrium is reached.
A belt is wrapped around a pulley for 180 degrees. The loose-side belt tension is 100 lb and the coefficient of static friction is 0.30. Calculate the maximum belt tension if motion is impending. Assume A) a flat belt and B) a V-belt with a groobe an..
The constant of spring AB is k, and the spring is unstretched when θ = 0. Knowing that R = 10 in., a = 20 in., and k = 5 lb/in.,
The Tupperware hydroelectric plant on the Blackstone River has four 36-in-diameter turbines, each providing 447 kW at 200 r/min and 205 ft3 /s for a head of 30 ft.
Two capillary tubes have radii of 1 mm and 0.5 mm respectively. They are placed in a liquid whose density is 0.80 g/cc and which completely wets the walls of the tube, i.e. theta = 0. The difference in height of capillary rise is 0.74 cm.
THE WATER TABLE OF A SATURATED , UNCONFINED AQUIFER COINCIDES WITH THE LAND SURFACE. THE AQUIFER IS 52 FT THICK AND THE MATERIAL HAS A UNIT WET WEIGHT OF 135 LB/FT^3.
Convert a stress of 4500 Newtons per square millimeter to kipsper square foot. Use complete and utterly perfect unit analysismethods. Do one one calculation line.
one atmospheric air stream at 15 c and 30 percent relative humidity is mixednadiabatically with another air stream at 30c and 70 percent relative humidity in a steady flow process
a mass of 2kilogram is projected with a speed of 3m/s.if a plane inclined 20 degrees with the horizontal.after travelling travelling 0.8meters, the mass comes to rest. determine the coefficient of friction and also the speed as the black returns t..
Assume for your calculations that each member is in tension, and include in your response the sign of each force that you obtain by applying this assumption.
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