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A diving board of uniform cross-section is designed to deflect 6" under the weight of a 150 pound person standing on the end. With the recent trend towards obesity, the manufacturer wants to change the length (but not the cross-section) so that the 6" deflection occurs when a 200 pound person stands on the end. By what factor must the length of the current board be multiplied to calculate the length of the new board?
Calculate the elongation of a steel bar 4 feet in length and 4 inches in diameter when subjected to a force of 2.5 kips. Assume that the bar remains in the elastic region with E=30 ksi.
A confined aquifer has a specific storage of 2.5*10^-6 ft^-1 and a thickness of 200 ft. How much water would it yield if the water declined 5.5 ft uniformly over a circular area with a radius of 1000 ft
the flow into the lake is from is from a stream is 300 m3/d andthe flow into the lake from runoff averages 20 m3/d. The lake is used for fishing by the local residents but the pesticides from local farms may damage the fish population.
What does under-reinforced mean Which is desirable and why How would your Moment-Curvature plot be affected if the amount of tension steel was doubled How would your Moment-Curvature plot from part a be affected if compression steel was added to the..
Plot ω vs t, marked by red stars. Label the x-axis, t,and the y-axis, ω. Give the plot a suitable title. Add a legend to the plot describingthe relationship between ω and t. Change the y-axis scale to show the plotfrom estimate ω is -100 to 1100.
Using darcy-weisbach equation, calculate the major friction head loss for a 24 inch diameter, 120 ft long pipe that can carry water with a flow rate of 5 cfs. Assume the temperature of water is 70 deg F and the roughness of the pipe is 0.0016 ft.
For the purposes of assessing an economy's growth performance, which is the more important statistic, real GDP or nominal GDP? Why?
Compare the three-decimal-place values of the two approximations at x=(1/2) with the value y(1/2) of the actual solution . then do the same for PART B: y'=-2xy , y(0)=2 ; y(x)=2e^(-x^2)
In an experiment to estimate the acceleration due to gravity,a student drops a ball at a distance of 1m above the floor. His labpartner measures the time it takes to fall and obtains an estimateof 0.46s.
Determine the diameter (in inches) and velocity (feet per second) of a concrete storm pipe required to carry a peak flowrate of 20 cfs at a slope of 1.0% Design the pipe to flow at 75% capacity and use a Mannings n of 0.013.
A reverse osmosis plant desalinates 5X10^6 L/day of feedwater containing 1500 mg/L of salts, yielding 3X10^6 L/day of product water with 75 mg?l of salt. What would the salt concentration be in the brine?
Consider high pressure steam at 400 degrees C and v =0.01567 m^3/kg. Obtain estimates of the pressure using (a) the van der Waals equation (b) the redlich-kwong equation. The actual pressure is 150 bar.
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