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Question 1. A reservoir has been constructed to supply irrigation water to adjacent farm land. Flow rate into the reservoir is 20,000 m3/yr with a dissolved salt concentration of 500 g/m3. The farm land has a water requirement of 104 m3 per year lost by evaporation and transpiration plus additional water to flush out salt carried in by the irrigation water. This salty water is called irrigation return flow and cannot exceed 3000 gm-3, otherwise plants are killed. The agricultural return flow enters the reservoir as indicated to the right. Assume steady state conditions, no rainfall, no reservoir evaporation, and no salt lost to the atmosphere.(A) What is the water flow rate out of the reservoir? (Qout = 10,000 m3/yr)(b ) b)What is the salt concentration in the reservoir (which is the salt concentration leaving the reservoir)?(B) What pumping rate is required to irrigate the farm land and flush salts back into the reservoir?Question 2. Concentration of solids from liquid waste streams involves a combination of a settling tank and a centrifuge. The settling tank produces relatively clean effluent at a solids concentration of 10 gm-3and a sludge at a concentration of 1000 gm-3. This sludge waste stream then enters a centrifuge that concentrates the sludge to a solids concentration of 10,000 g/m3 (1 percent solids by weight) and produces a concentrate fluid stream at 200 gm-3. The concentrate is blended with influent to the settler as indicated to the right. For an influent flow rate of 1 m3S-1 at a solids concentration of 100 g/m3:(A) Calculate the flow rate of sludge produced if only a settling tank is used (no centrifuge). (B) Calculate the flow rate of thickened sludge leaving the centrifuge and the flow rate to the centrifuge, Os' Question 3. Sludge feed to an anaerobic digester is 75 percent volatile solids by weight. The sludge withdrawn after digestion is 45 percent volatile solids. What fraction of the volatile solids put into the digester has been destroyed? (Berthouex and Rudd, 1977).
A particular organ pipe can resonate at 231 Hz, 385 Hz, and 539 Hz, but not at any other frequencies in between. Is it an open or a closed pipe? What is the fundamental frequency of this pipe.
An airplane is flying with a velocity of 93.0 m/s at an angle of 22.0^circ above the horizontal. When the plane is a distance 119 m directly above a dog that is standing on level ground, a suitcase drops out of the luggage compartment.
A screen is placed 42.7 cm from a single slit that is illuminated with light of wavelength 677 nm. If the distance between the first and third minima in the diffraction pattern is 3.45 mm, what is the width of the slit.
The coefficient of volume expansion of coffee is the same as that of water. How much coffee (in cubic meters) has spilled out of the beaker.
Each is afraid that one vine will break; as a result they grab each other and hang on. They swing upward together, reaching a point where the vines make an angle of 22.1° with the vertical. Find the value of the ratio m/M.
The flywheel of an engine has a moment of inertia 3.00 {rm kg} cdot {rm m} ^ {2} about its rotation axis. What is its final kinetic energy.
Water at a gauge pressure of 3.0 atm at street level flows into an office building at the speed of 0.40 m/s by a pipe 5.0 cm in diameter. The pipe tapers down to 2.20 cm in diameter by the top floor, 15 m above, where the faucet has been left open. E..
A 67.3 ice skater moving to the right with the velocity of 2.52 throws a .151 snowball to the right with a velocity of 33.7 relative to the ground. What is velocity of the ice skater after throwing the snowball.
The coefficient of static friction between the stone and each side of the tread channel is 0.7. While the tire surface is rotating at a maximum speed of 1 m/s, the stone flies out of the tread. The magnitude FN of the normal force that each side of t..
A battery having an emf of 11.10 V delivers 102 mA when connected to a 61.0 load. Find out the internal resistance of the battery.
What is magnitude of the electric field
What is magnitude of the current
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