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1.Compare the maximum shear stress and the angle of torsion for members of equal lengths and cross-sectional areas with square, rectangular and circular section. All members are subjected to the same torque. The circular section is 100 mm in diameter and the rectangular section is 25 mm wide.
2.A girder that carries a uniformly distributed dead load of 1.7 K/ft plus its self-weight and three concentrated live loads of 15 kips at quarter points of that 36 ft span is to be sized. using A992 steel, determine the lightest W-shape to carry the load with lateral supports provided at the supports and loads point . use the correct Cb and design by LRFD.
(1) a constant wind velocity that is twice the mean wind velocity and operating half the time; and (2) a constant wind velocity that is three times the mean wind velocity operating one-third of the time.
What is the most significant difference between “free” jets and flows in confined structures (nozzles, pipes, etc.) in terms of formulation of force terms ÓF(i.e. left hand side) of the momentum equation? Assume all flows are subsonic and neglect the..
Consider a system that consists of 4 devices. The probabilities of failure for each of the devices are, respectively: 10%, 25%, 20%, and 30%. (a) If these components were in series, what is the probability that the system operates
Two vessels are connected to a differential manometer using mercury (s=13.56), the connecting tubing being filled with water. The higher-pressure vessel is 5 ft lower in elevation than the other
you are working as a project analyst for the local gas utility and you have been placed on a project to install an
What is the smallest particle size (density 2.65 g/cm3) that will be removed in a horizontal grit chamber 10 m long and 1.0 m deep if the flow rate is 1000 m3/hr. Assume the temperature of the water is 25°C.
The 90-lb force is required to drag the 200-lb crate 60 ft up the rough inclined plane at constant velocity. If the force is removed when the crate reaches point B, and the crate is then released from rest
If we have 2.5 kg of austenite containing 0.65 wt% C, and it is cooled to below 727?C (a) What is the proeutectoid phase? (b) How many kilograms each of total ferrite and cementite form?
The sodium cyanide solution ([NaCN]-total = 0.01 M) is kept at pH 10.4. The pH is kept high to keep the cyanide in the CN- form. If CN protonates by the reverse of the HCN dissociation reaction,
A balloon is to be used to carry meteorological instruments to an elevation of 15,000 ft where the air pressure is 8.1 psia. The balloon is to be filled with helium, and the material from which it is to be fabricated weighs 0.01 lbf/ft^2.
A 20 kg box is on an upward inclined surface of 30 degrees from the floor. the velocity of the box is zero when it is subjected to a constant horizontal force F=30N. assuming the surface is smooth,
An open rectangular tank 1m wide and 3m long contains water to a depth of 1m. If the height of the tank sides is 1.5m, what is the maximum horizontal acceleration (along the axis of the tank) than can develop before the water spills
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