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The critical buckling length for a column under its own weight, with mass density , area A, and moment of inertia I, is given by the formula
Say this buckling mode limits the weight of collars that can be stacked on a drill bit in a drill string. Determine the maximum force that the weight of stacked collars can exert on a drill bit, without the string of collars buckling. Take the steel collars to have an outer diameter of 7 in. and an inner diameter of 2.81 in.
A gun is aimed at point A located 15 degrees N or W. Knowing the gun forms and angle of 25 degrees with the horizontal and the max recoil force is 400 N, determine a) the x, y,z components of that force b)
State the two main reasons why an activated sludge system is operated at a relatively low food/microorganism ratio.
If 90% of the weight of this brown sugar is sucrose (C12H22O11), what mass of dissolved oxygen would have been required to degrade this mass of sucrose had some not been recovered from the barge prior to its dissolution and dispersion into the river?
Describe the differences among the three main clay minerals.
List a few mechanistic processes for which the hydrostatic stress is likely to have a large influence on the corrosion-fatigue crack growth characteristics.
A component that is made of S-590 alloy is to be subjected to a static stress of 400 MPa at a high temperature. Using a safety factor of two based on the stress, determine the maximum temperature the component must be exposed to for it to sustain the..
A train moving at 100 km/hr decreases its speed to 80 km/hr in 3.5 seconds. How far, in meters, did the train travel during this time
A pile resists the tension developed by three stay cables for a major tent (Membrane) Structure. Assuming no bending is desired in the pile (no resultant horizontal component), what is the magnitude of the force S if the angle \thetaS = 30 degrees
A solid cylinder of 50 mm diameter and 900 mm length is subjected to a tensile force of 120kN. One part f the cylinder L1 long is of steel, the other part
One issue is to calculate the "pooled" variance and "pooled" standard deviation. Since we expect that the variances of the improvement scores by both groups could be a bit different, we'd want an overall value that reflects the variance of both gr..
If the bar is released from rest in the vertical position (θ = 0) derive an expression for the magnitude of the force exerted by the bearing at O on the frame as a function of θ.
Find the change in depth and in absolute water level produced by a) a smooth upward step of 1 ft b) a smooth donward step of 1 ft, in the channel bed c) find the maximum allowable size of thw upstream flow to be a possible as specified
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