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The motion of the 2.5-kg rod AB is guided by two small wheels which roll freely in horizontal slots. If a force P of magnitude 8 N is applied at B, determine (a) the acceleration of the rod, (b) the reaction at A and B.
A stratified lake could be idealized as two layers: with 7.0 m of fresh water on top and 10.0 m of cold water (specific gravity = 1.02) on the bottom. What are the pressure heads at the interface and at the bottom of the lake, in terms of water col..
Break Even Stripping Ratio (BESR), Given an underground total mining cost of $8.85 per tonne, surface mining costs of $2.95 per tonne of ore, and surface mining stripping costs of $1.75 per tonne of waste
A trapezoidal channel with a bottom width of 4 feet and side slopes 2:1 (H:V) and a bed slope of 1 percent conveys a discharge of 50,000 gpm. Assume n = 0.025. Compute the normal depth.
A drinking water treatment plant will be designed to process a flow of 15,000 m3/d. The sedimentation tank will have a residence (detention) time of 4 hours and the overflow rate (Q/A) of 16 m 3 /m 2 -day. Estimate the required surface area (A), an..
A bridge has cylindrical piers 1 m in diameter and spaced 15 m apart. Downstream of the bridge where the flow disturbance from the piers is no longer present, the flow depth is 2.9 m and the mean velocity is 2.5 m/s.
A 12 ft x 12 ft square area carrying a uniform load of 5000 lb/ft^2 s applied to the ground surface. Find the vertical stress increment due to the load at a depth of 25 ft below the center of the loaded area.
Estimate the chronic daily intake of 1,1,1-trichloro ethane from exposure to a city water supply that contains a 1,1,1-trichloroethane concentration equal to the drinking water standard of 0.2 mg/L.
The wet bulb and dry bulb temperatures for humid atmospheric air (at 100 kPa) are measured to be 20 C and 25C respectively. Determine: a. using the psychrometric chart, the relative humidity b. using the psychrometric chart, the humidity ratio
Determine the Modulus of Elasticity of Concrete by the ACI formula for a concrete cylinder that has a unit weight of 120pcf (1920kg/m^3) and a compressive strength of 3000 psi (21MPa).
The road has 12-ft lanes. Due toexpensive excavation, it is determined that a maximumof 34 ft can be cleared from the road's centerline toward the inside lane to provide for stopping sight distance.
What is the dry unit weight, the saturated unit weight, and the buoyant unit weight, of a soil having a ratio of 0.5 and a value of Gs of 2.7
An insulated rigid tank is initially filled with a saturated liquid-vapor mixture of water. Initially three-quarters of the mass is in the liquid phase, the mass is 10 lbm, and the pressure is 15 psia.
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