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Figure P16.3 shows the profile of a beach on a lake. It is proposed to draw down the lake by 2 m. Determine the slope angle of the beach below the high water level after the drawdown. You may assume an infinite slope failure mechanism. The critical state friction angle of the sand is 30°.
What is the mathematical expression for Centripetal Acceleration? Please describe the terms in your expression and give a brief summary of what Centripetal acceleration is.
A 12-in well is drilled through a confined aquifer of average thickness 80 ft. Two observation wells located 50 and 120 ft away register a difference in drawdown of 10 ft. The steady-state pumping rate is 1000 gpm
Boxes are placed on a slope at uniform intervals of time trelease and slide down the slope with uniform acceleration. Knowing that as a box B is released, the preceding box A has slid 6 meters down the slope and that 1 second later they are 10 meters..
A 15kg Block rests on top of a 25kg Block which is subject to a 400N force. Block B sits on a table. the Coeffiecents of friction are the same for all surfaces, u(s) is .4 and U(k) is .3. The force is Applied to the bottom block ( with no inclinat..
The vertical velocity of the box at the time that it hits the surface is v= 5m/s. After impact the camera experiences an acceleration of a = -kx, where k is a constant and x is the compression of the packing material.
calculate the ratio of the area to volume for unit cube,a unit sphare inscribed inside the cube,and as right cylinder inscribed inside the cube.
A city is considering a 3 stage membrane system to treat brackish groundwater at its water treatment plant, WTP (Qf=1000m^3/d, Cf=2000mg/L TDS). Each stage can perform 60 % water recovery (Qp/Cf) and 90% salt rejection (1-Cp/Cf)
A W16 x 36 simply supported beam is 30 ft long and supports auniform dead load of 970 lb/ft, a roof live load of 240 lb/ft and asnow load of 270 lb/ft. Is this beam adequate to support the load? Please show the calculations.
If we compare brass and bronze having 90% copper, brass (alloy with zinc) will have less yield strength than bronze (alloy with tin). Why?
A 1:40 scale model of a ship is tested in a towing tank. Prototype operates in seawater at 60 F. Find a liquid to be used in the towing tank that allows both Froude and Reynolds scaling for the model and the prototype.
The number of vacancies in some hypothetical metal increases by a factor of 4 when the temperature is increased from 1090 K to 1140 K. Calculate the energy (in J/mol) for vacancy formation assuming that the density of the metal remains the same ov..
Water flowing in a wide channel of depth 35 cm undergoes hydraulic jump that resulted in energy dissipation of 72%. Estimate (a) the downstream depth, (b) the volume flow rate per meter of width.
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