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Two identical 3 in. major-diameter power screws (single-threaded) with modified square threads are used to raise and lower a 50-ton sluice gate of a dam. Quality of construction and maintenance (including lubrication) are good, resulting in an estimated friction coefficient of only 0.1 for the screw. Collar friction can be neglected, as ball thrust bearings are used. Assuming that, because of gate friction, each screw must provide a lifting force of 26 tons, what power is required to drive each screw when the gate is being raised at the rate of 3 ft/min? What is the corresponding rotating speed of the screws?
Repeat this experiment for all your fingers, repeating the test several times on each finger. Compute the average and the standard deviation. Then perform the test on other subjects. Discuss your results. Do you notice large variations in the resu..
airplane takeoff from an aircraft carrier is assisted by a steam driven pistoncylinder device with an average pressure
an otto cycle has the lowest temperature of 60degreef and the lowest p as 12psi. the highest temperature is 4040degreef
Assuming that the joints at A, B, and C act as hinged connections, compute the compression in each brace BC. Wet concrete may be treated as a liquid with a density of 2400 kg/m3.
for the deteministic signal yt-23sin6pit4sin18pit sketch the amplitude-frequency spectrum of yt a when the sinal is
It is known that a long log floats with its axis horizontal. A very short log, however, floats with its axis vertical. Determine the maximum length of a cylindrical walnut log 30 cm in diameter that will cause it to float with its axis vertical.
the material hoist and the load have a total mass of 900 kg and the counterweight c has a mass of 150 kg. at a given
Write a MATLAB program that takes an input of the stress state in 3D. The program should Create the stress tensor. Calculate the principal normal and shear stresses by solving the Eigen value problem.
use moodys diagram reynolds number to solve. water at 80degf flows from a storage tank through 550 feet of 6-inch
water is the working fluid in a cogeneration cycle that generates electricityand provides heat for campus buildings.
Define and identify unique characteristics of the items below: Abrasive Machining, Honing, Lapping, Surface Grinding, Centerless Grinding.
a steel mill has a production set up where metal sheets are rolled for desired thickness as they emerge from the
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