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In the determination of the average velocity of flow in wide rivers, it is common practice to estimate the average velocity in a vertical section by making a single measurement at a distance below the water surface equal to 60 percent of the depth. Assuming the following equation represents the true distribution in the vertical, determine the actual distance below the surface at which the velocity, u, equals the depth-averaged velocity, U.
consider a house into which radon is emitted through cracks in the basement. the total volume of the house is 650 m3
A 3-ft diameter column with weight of 150 kg is placed on top of 1 m thick aggregate layer. The soil beneath the aggregate layer is sand. The friction angle of the aggregate is 36 degrees and the unit weight is 22 lb/ft3. What is the pressure acti..
Conduct either a qualitative or quantitative risk assessment on this project. Identify the risk factors that you consider most important for the suspension bridge construction. How would you assess the riskiness of the project? Why?
A hazardous waste incinerator is to burn 200 Kg/h of PCB waste that is 30 % PCB and 70 % organic solvents. During testing phase, the concentration of PCB in the emission was recorded as 0.025 g/ m³
An electric resistance heater now heats the water. Calculate the amount of heat added to the water and the associated change in entropy when the volume of the water is 50 times its initial value.
A foot valve for a pneumatic systemis hinged at B. Knowing that a=28degrees, determine the moment of the l6-N force about point B by resolvingthe force into horizontal and vertical components
After compaction the void ratio is reduced to 0.60. Determine: (a) Dry and moist unit weights before and after compaction (b) Degree of saturation after compaction.
Water flows in a 100 m long pipe at 3 m/s. If the water temperature is 20 degrees C, determine the minimum valve-closure time to avoid creating water hammer pressures. What is the maximum water-hammer pressure that can occur
The plate is submerged in a liquid is a vertical position with the parallel sides horizontal and the shorter parallel side at the top and exactly in the surface of the liquid.
The coefficient of static friction between each crate and the ground is 0.25 The crates are next to each other connected by a rope and then from the other end one has a P force going up at an angle of 30 degrees
If a unit mass of groundwater accelerates from rest to an average linear velocity of 1 m per year and climbs a vertical distance of 1 m, compare the ratio of kinetic energy to the potential energy of the unit of groundwater.
If vehicle arrivals at the lot follow a poisson process, with arrival rate lambda = 0.2 vehicles/hour, what is the probability the lot is full at 9:15 AM. Assume that no one leaves during this period.
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