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Swimmer A immediately starts walking toward B at a speed of 2ft/s relative to the raft. Knowing that the raft weighs 300 lb, determine (a) the speed of the raft if B does not move, (b) the speed wit
Suppose a watershed in Athens, Georgia has 25 acres pasture (CN=70) and 50 acres wooded (CN=55). Determine the excess rainfall (in inches) and runoff volume (cubic feet) assuming the design rainfall
The bar is confined to move along the vertical and inclined planes. The velocity of the roller at A is Va=5.2 ft/s when theta=40 . a)Determine the bar's angular velocity when theta=40. b)Determine t
Determine the preconstruction and post construction vertical stress imposed on the soil at a point 2 m below the center of the foundation area (assume westergaard conditions applied)
Design the pins so that the ledge can support Doug and Jeremy and eight others on each side of the building. Assume each person weighs 200 lbs.Pin properties: Ultimate shear strength = 100 lb/in^2
For a flow of 2 MGD, an influent BOD of 200 mg/l, a depth of 8 feet, and a desired effluent BOD concentration of 20 mg/l, determine the volume required for trickling filtration treatment as predicte
Consider a $50000, 30 years loan at 12% APR with monthly uniform payments. What portion of the 263rd payment goes towards reducing the principal and what portion is interest
The first alternative is deep-well pumping at an annual cost of $10500. The second alternative is to instal an 18 inch diameter pipeline from a local surface reservoir at a first cost of $25000 and
calculate the: 1) molar concentration of metal ion in the stock coagulant solution; 2) coagulant feed rate (into the process water flow stream) in units of L/day and L/min; 3) alkalinity consumed (i
Design the number of teeth and depth of teeth need be chosen. Considerations include the turn angle for each stroke, the bearing stress on the teeth and pins and shear stress on the teeth.
A trapezoidal channel has a bed width of 3.5 m and a side slope of 30 degrees from the horizontal. Determine the critical depth and the critical velocity for a flow of 22 cubic meters per second.
A wheel has an angular acceleration of alpha=(0.5*theta) rad/s^2 , where theta is in radians. a) Determine the magnitude of the velocity of point P located on its rim after the wheel has rotated 2 r
When the gear rotates 18 revolutions, it achieves an angular velocity of omega= 40 rad/s , starting from rest. Determine its constant angular acceleration the time required.
The flywheel rotates with an angular velocity of omega = (4*theta^(1/2)) , where theta is in radians. Determine the time it takes to achieve an angular velocity of omega = 190 rad/s . When t = 0, th
Lane widths are 12ft and the superelevation is .006 and was set assuming maximum fs. If the necessary sight distance required 52ft of lateral clearance from the roadway center line, what design spee
During a 60 minute storm the following amounts of rain fell during successive 15 minute intervals: 33mm, 23mm, 15mm, and 5mm. What is the maximum intensity
The coal may either be moved by train from the mine to power plants near where the power is used, or the coal could be combusted near the mine mouth to generate electricity and the electricity could
A manometer connects a large water tank open to the atmosphere to a closed spherical tank of air. The manometer contains both oil and water. Find the gage pressure in the tank "A".
Suppose a drainage basin has an area of 288 acres with a CN=55(Runoff Coef. of 0.30). Determine the peak discharge (in cfs) that would result from a 6.0in., 24-hr assuming there are no ponds and swa
Determine the horizontal and vertical components of reaction at the pin supports at A and B and indicate direction. Take F1 = 7 KN, F2 = 6 KN, and h = 1 m.
A block of material A is placed in closed contact with unlimited supply of material B, after 15 hours at temperature T1, it is observed that atoms of B have penetrated 0.5mm into material A.
Determine the forces in members DC,CB and BA of the truss. State whether the members are in tension or compression. set P=7 kN. Determine the forces in members DE and EA of the truss.
A municipality uses green energy and treats 15 × 106 gal/day of a groundwater containing the following: CO2 = 17.6 mg/L, Ca2+ = 80 mg/L, Mg2+ = 48.8 mg/L, Na+ = 23 mg/L, Alk(HCO3-) = 270 mg/L
Air enters an electrical furnace at 20oC, 100 kPa, with a volumetric flow rate of 30 m3/min. The furnace delivers air at 40oC to a duct system with three branches consisting of two 15-cm-diameter du
draw shear and bending moment diagrams determine the maximum stress on the beam (E=2.0E+11Pa) a simply supported beam AB is 5 m long carrying a uniform distributed load of 10kn/m over a 4m span