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A cylindrical shaft of circular cross section is subjected to a bending moment of constant amplitude over its entire length. The deformation of the shaft material can be approximated by an elastic-perfectly plastic constitutive model and the yield strength in tension can be considered equal to that in compression. If the outer fibers of the shaft yield plastically over a depth of 1/4 of the diameter during the application of the bending moment, qualitatively discuss the development and distribution of mechanical residual stresses along the diameter of the shaft when the bending moment is fully removed.
Using Darcy's Law, calculate the quantity of groundwater (L/day), the seepage velocity (m/s), and the contaminant loading (Kg/day) to the river (assuming no retardation) for the following scenario. Be sure to include both a plane view and cross-se..
To achive a specific level of disinfection a water treatment plant operator determines the" Ct" value 180mg min/l is necessary with units for disinfectant concentration C in mg/l and disinfectant contact time t in minutes
A suspended solid particle of density 2200 kg/m3 is moving at 0.25 m/s of horizontal and 0.15 m/s of vertical velocity respectively in a sedimentation tank. If the depth of the tank is 2.0 m what should be the length of tank to trap the particle i..
A jar test has shown that the optimum dose of ferric chlorideconsumes all of the alkalinity. If the amount of the ferricchloride that is in excess is 10 mg/l, how much lime(Ca(OH)2) in mg/l must be added to neutralize the acidformed.
Water are mixed with 150g of another fluid (density = 790 kg/m3 ). What is the specific volume of the mixture, assuming that the volumes are additive and the mixture is homogeneous?
A 150 L helium tank contains pure helium at a pressue of 1825 psig. How many 3.5L helium balloons can be filled from the helium in the tank? (Assume an atmospheric pressue (14.7 psia) and a temp of 298K.
If the ultimate BOD of the mixed river water is 30mg/L, the rate constant for BOD at 20ºC is 0.6d-1, the reaeration rate constant at 20ºC is 0.8d-1, and the removal of BOD by sedimentation can be neglected
A model is to be produced for a prototype with reynolds number similitude. The prototype and model will both be in air, if the prototype has a velocity of 500 ft/s and a diameter of 30 ft, what should the velocity for the model be if the model diamet..
A 10 ft. boom is acted upon by the 840-lb force. Determine the tension in each cable and the reactionat the ball-and-socket joint at A.
A hydrologic structure (e.g. a dam or a dike) is said to be designed for the N-year flood if it has a capacity which will be exceeded only by a flood equal oto or greater than N-year flood.
The rigid bar of negligible weight is supported as shown. Find the stress in each rod if the temperature rises DeltaT after a load P is applied. Use the following data: area of steal rod 320mm2, bronze rod 1300mm2, thermal expansion coefficient Al..
Soil A is micaceous with an average grain relative density of 2.80, and has a high plasticity in its fine fraction. The ground quartz-feldspathic B is, with an average relative density of 2.65 and fine grains of low plasticity.
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