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The gas tank has an inner diameter of 1.50 m and a wall thickness of 25 mm. If it is made from A-36 steel and the tank is pressured to 5 MPa, determine the factor of safety against yielding using
(a) the maximum-shear-stress theory, and
(b) the maximum-distortion-energy theory.
A body slides down a frictionless plane and during the third second after starting from rest if it travels 20.4m. What is the angle of inclination of the plane?
Prepare a set of suitable field notes for this project (see Plate B.6 in Appendix B) and compute the cut required at each stake. Close the level circuit on the benchmark.
The motion of the outer frame B is given by xB = b sin ωt. For what range of the driving frequency ω is the amplitude of the motion of the mass m relative to the frame less than 2b?
The dimension h is to be determined so that a worker can comfortably slide boxes weighing up to 100lb up and downa frictionless incline. If the worker can apply a 50lb horizontal force to the box
A hawser is wrapped two full times around a bollard. by exerting an 80 pound force on the free end of the hawser a dockworker can resist a force of 5000 on the other end of the hawser.
What types of proteins had to have been degraded to isolate theDNA? Why is DNA considered to be an acid?
The design of a concrete mix requires 1173kg/m3 of gravel in SSD condition, 582 kg/m3 of sand in SSD condition, and 157kg/m3 of free water. The gravel available at the job site has a moisture content of 0.8% and absorption of 1.5%
A hortizonal rectangular concerte channel terminates in a free outfall. The channel is 4 m wide and carries a discharge of waterr of 12 cubic meters per second.
A 1.50 L buffer solution is 0.250 M in HF and 0.250 M in NaF. Calculate the pH of the solution after the addition of 0.0500 moles of solid NaOH. Assume no volume change upon the addition of base. The Ka for HF is 3.5 x 10 -4 .
A new interstate highway is being built with a design speed of 70 mi/h. For one of the horizontal curves, the radius (measured to the innermost cehicle path) is tentatively planned as 2500 ft. What rate of superelevation is required for this curve
What is the maximum weight that can be suspended on a 16 Kg poll, 3/5 from the end. The maximum tension of the 30 degree guy-wire is 1500 N. Find the horizontal and vertical forces exerted on the poll by the hinge.
Three solid shafts, each of 3/4 in. diameter, are connected by the gears shown. Knowing that G=11.2*10^6 psi, determine (a) the angle through which end A of shaft AB rotates, (b) the angle through which end E of shaft EF rotates.
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