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Design a helical torsion spring for severe service using stainless steel wire, ASTM A313. type 302, to exert a torque of 12.0 Ibin after a deflection of 270° from the free condition. The outside diameter of the coil should be no more than 1.250 in. Specify the diameter of a rod on which to mount the spring.
A rectangular channel is 25ft wide and has a flow of 500 cfs at a velocity of 5ft/s. (a) Determine the specifc energy of water in the channel. (b) What is the criticl depth of water in the channel (c) What is the critical velocity
What type of cement would you use in each of the following cases? Why?
Compute the atomic packing factor for the diamond cubic crystal structure. Assume that bonding atoms touch one another, that the angle between adjacent bonds is 109.5, and that each atom internal to the unit cell is positioned a/4 of the distance awa..
When using an automatic level and rod to conduct differential leveling for construction grade control of a concrete wall, the first necessary step following set up of the level is to:
The maximum flexural stress on a transverse cross section of a beam2" x 4" with a rectangular cross section must not exceed 8 ksi.Determine the maximum resisting moment Mr that the beamcan support if the neutral axis is
The bracket ABC can be supported in the eight different ways shown. All connections consist of smooth pins,rollers, or short links. For each case, answer the questions listed in Prob.4.59,and, whenever possible
The total dissolved inorganic carbon (TIC) of a sample of groundwater is 8.33 mM. The temperature of the aquifer is 15C, the pH is 7.5, and the ionic strength is 0.05 M. What is the H2CO3, HCO3-, CO3 2-, and the partial pressure of CO2? [Use activ..
In this case, it seems clear why Johnson is tempted to omit references to the ambiguous data. He is understandably anxious to graduate and move on to other challenges in his professional life. He is worried that full disclosure of his findings could ..
State the reasons why wood is a preferred material in structural work.
Traffic data collected at the same time indicated an average time headway of 4 sec. Determine the (a) density on the highway (b) flow on the road (c) space mean speed.
When a channel of triangular cross section was new, a flowrate of Q caused the water to reach L = 2 m up the side of the channel. After considerable use
a barge has the trapezoid chape. It is 22 m long into paper. If the total weight of barge and cargo is 350 tons, what is the draft "h" of the barge when floating in seawater
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