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Consider a small air pistol (Fig. P6.86) with a cylinder volume of 1 cm3 at 250 kPa, 27?C. The bullet acts as a piston initially held by a trigger. The bullet is released, so the air expands in an adiabatic process. If the pressure should be 120 kPa as the bullet leaves the cylinder, find the final volume and the work done by the air.
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
A water jet 25mm in diameter moves with a constant velocity of 15 m/s and strikes a stationary and symmetrical curved plate at the center. If the jet is deflected through an angle of 120 at the outlet end of the curved plate, find the force exerte..
The initial piezometric head in a confined aquifer has a thickness of 11.6 m is 85.7 m above sea level. A well with a radius of 0.5 m pumps at a constant rate of 1240 m3/day. After the cone of depression has achieved equilibrium, the piezometric head..
Phenol is approximately 12 times more soluble in 1 volume of isopropyl ether than it is in 1 volume of water. How many extractions are required to decrease the concentration of phenol below 100 mg/L
A 6 lane highway has 12 ft lanes and a crown cross-slope of 0.02 ft/ft. The design speed of the road is 60 mph. The station of the PC is 20+00. Determine the station of the point where th superelevation runoff begins
To avoid the salinization of soil in a farming area, parallel drainage canals are to be installed to maintain the water table at a depth of at least 4m below the ground surface.
Assuming no friction losses in the hose, will the velocity change if the hose is draped over the handrail going around the pool instead of going under it?
The de-carburization of a steel can also be described by the error fuction. Starting with the equation, (cx-c0)/(sc-c0) = 1-erf(x/(2*(sqrt(Dt)))), and taking cs=0 derive an expression to describe the concentration profile of carbon as it diffuses out..
A layer of clay 5 m thick overlies a deposit of sand 5 m thick, which is underlain by rock. The water table in the sand is sub- artesian with a level at 2 m below ground level
Annual maintenance cost for a particular section of highway pavement are $2000. The placement of a new surface would reduce the annual maintenance cost to $500 per year for the first 5 years and to $1000 per year for the next 5 years. After 10 years ..
A soil borrow material in its natural state in the ground has a unit weight of 118pcf. Its natural water content is 7%. What is the dry unit weight of this material?
The excavation has to be kept dry. Determine the flow (qi) into the excavation
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