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find principle stresses, max shear stress at a cross section 2 ft from the left of each locations: a) neutral axis, b) 2in. above neutral axis, c) the top of the beam.
a 150 kg mass is suspended by wires from two hooks. the lengths of the wires have been adjusted so that the wires are each 50º from horizontal. assume that the mass of the wires is negligible.
Determine the centroid for the region bounded by the x-axis, the curve y=x^3, and the line x=3
A clean-earth channel, for which n=0.020, is 6m wide and lies on a slope of 0.005236. Water flows at 30m3/s through the channel and enters a reservoir. The water depth in the channel, just before the entry to reservoir, is 3m.
A tangent section of highway has a -1.0% grade and ends at station 0+1450and elevation 25m. It must be connected to another section of highway that has a -1% grade and that begins at station 1+345 and elevation 40m.
Data from service records show that the time to repair a certain machine is normally distrubuted with a mean of 65 min and a standard deviation of 5 min. Estimate how often it will take more than 75 min to repair a machine.
Indoor Air quality is greatly affected by Radon, which can cause lung cancer. When we moved to Colorado, we tested the house for Radon and installed a radon mitigation system.
Derive an equation that allows you to compute the diameter of the drain hole for a desired steady water height in the tank for the design condition inflow and pumping rates.
Determine whether municipal wastewater containing 5 mg/L of selenium is a RCRA hazardous waste
A strata of clean, light-colored quartz sand located below the groundwater table has a moisture content of 25.6%. The minimum and maximum void ratios of this soil are 0.380 and 1.109, respectively
The unit will be of flood type, which will cool the products as they are conveyed into the channel filled with water. The products will be dropped into the channel filled with water at one end and be picked up at the other end.
Write out the final version of Hooke's Law which includes Young's Modulus. Draw the idealized Stress-Strain diagram for a material. On the drawing, please label: the yield stress, the plastic deformation, and the yield strain.
Drawdown at an observation well 15m from the pumped well is 3.0 m and a drawdown at a second observation well 150 m away is 0.30 m. Find the hydraulic conductivity of the aquifer.
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