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Submarines change their depth by adding or removing air from rigid ballast tanks, thereby displacing seawater in the tanks. Consider a submarine that has a 700m3 air-ballast tank originally partially filled with 100m3 of air at 1500 kPa and 15oC. For the submarine to surface, air at 1500 kPa and 20oC is pumped into the ballast tank, until it is entirely filled with air. The tank is filled so quickly that the process is adiabatic and the seawater leaves the tank at 15oC. Determine the final temperature and mass of the air in the ballast tank.
a layer of clay, 5m thick, overlies a deposite of sand, 5m thick, which is underlaid by rock. the water table in the sand is sub-artesian with a level at 2m below fround level. the saturated unit weights of the clay and sand are 21 and 16 KN/m^3 r..
A person produces about 0.17 pounds of BOD per day in fecal waste. What is the population equivalent of the wastewater flow Based on this calculated population, what would the average daily wastewater production be per person
Determine the slenderness ratio of a 5 m column with built in ends if its cross- section is (a) circular with a radius of 40mm and (b) 50 mm square. Use the concept of effective length.
You are using that tape to measure the distance between two pointswhere the tapes are supported at the ends only. The temperature ofthe day is 68oF. What amount of tension do you need to apply not tohave any corrections in the tape measurement?
Given that the minimum footing size is 2(m) x 2 (m), design the foundation so that the conveyor system experiences continued operation.
determine the pressure head at the nozzle inlet to produce a water jet velocity of 40 ft/s. Neglect the friction loss and assume incompressible flow.
A crop has a consumptive use requirement of 1.2 acre-ft of water per acre of crop land. The crop is planted on 780 acres. Precipitation is 3.2 inches. The remainder of the 1.2 ac-ft/ac requirement is met by irrigation.
Route 1 has a free flow travel time of 4 mintutes and travel time increases by 3 minutes and for each additonal 1000 vehicle in flow, and route 2 has a free flow travel time of "b" minutes and travel time increases
Cities cover approximately 0.5% of the Earth's land area, which itself constitutes 29% of the total surface of the planet. What is the probability that the second explosion in part (b) occurs over a city? Assume an equally likely probability of im..
Set up a table showing curve elevations at the PVC, at the PVT, and at the half-station points along the curve. Compute the station and elevation of the curve turning point.
Water flows past a triangular flat plate oriented parallel to the free stream as shown. Integrate the wall shear stress over the plate to determine the friction drag on one side of the plate. Assume laminar boundary layer flow.
A 1000 in diameter solid steel (p= 0.303) bar is 10.0 ft long. Under a tensile load. (a) Estimate the lateral strain experienced by the bar (b) Estimate the cross sectional dimension of the bar when under strain
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