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The supporting structure of the billboard is attached to the ground by a pin at B, and its rear leg rests on the ground at A. Friction may be neglected. Point G is the center of gravity of the billboard and structure, which together weigh 2800 lb. To prevent tipping over in high winds, a 2370-lb weight is placed on the structure near A, as shown.
(a) Compute the magnitudes of the reactions at A and B if the wind load on the billboard is q = 120 lb/ft.
(b) Find the smallest wind load q that would cause the structure to tip over.
What is the shear strength in terms of effective stress on a place within a saturated soil mass at a point where the total normal stress is 295 kN/m2^2 and the pore water pressure 120 kN/m^2?
The slope of the channel is .15% and the mannings roughness coefficient is .038. estimate the depth 100m upstream of a section where the flow depth is 2.2m using the standard step method. Approximate how far upstream of this section would you exp..
The length of the cord is 1050 mm, and the effects of the radius of the small pulley A may be neglected.
Where max is the nonlinear phase shift on-axis when the sample is at the beam waist of the incident laser beam. Plot the functional dependence of both your result and the literature result
What is the design storage and water surface elevation at the peak outflow rate and estimate the long-term average reduction (EPA, 1986) in particulates under dynamic conditions.
The 40-ft-long A-36 steel rails on a train track are laid with a small gap between them to allow for thermal expansion. The cross-sectional area of each rail is 5.90 in^2 . Determine the required gap delta so that the rails just touch one another w..
Estimate the average hourly, average daily, and minimum hourly residential sewage flows from an area serving a population of 1500 people. Assume that the lenghth of sewer and house drains equals 3.0 km and that infiltration occurs
Route a trianglular hydrograph through a 100 foot wide rectangular channel with a bed slope of 0.015 and a Mannings n of 0.035. Take a distance between cross-sections of 3000 ft.
What is the force of the water on a spillway whose upstream depth is 1.2m and whose downstream depth is 0.2m. The width of the spillway is 3m.
the cost and revenue associated with producing a sustainable component are fixed costs = $112,500. Variable costs = $30 / unit. Revenue = $45 / unit. How many units must the company sell each year to breakeven
Determine the energy loss due to the gradual enlargement from a 25 mm pipe to a 75 mm pipe when the velocity of flow is 3 m/s in the smaller pipe and the cone angle of enlargement is 20°C.
Design a spreadsheet to estimate the dimensions of a tank for holding water. The spreadsheet should use input values from the user to return the height and diameter for a tank that will use the smallest amount of steel and therefore cost the least to..
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