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A bankrupt chemical firm has been taken over by new management. On the property they found a 20,000 m3 brine pond containing 25,000 mg/L of salt. The new owners propose to flush the pond into their discharge pipe leading to the Atlantic Ocean, which has a salt concentration above 30,000 mg/L. What flow rate of fresh water (in m3/s) must they use to reduce the salt concentration in the pond to 500 mg/L within one year?
A piston-cylinder device contains 0.2kg of water initially at 800 kPa and 0.06m^3. Now 200 kJ of heat is transferred to the water while its pressure is held constant. Determine the final temperature of the water.
a level is setup midway between X and Y reads 5.572 ft on X and 4.946 ft. on Y. The level is setup very close to X and a reading of 4.666 ft. is taken on X. what should the reading be at Y to adjust any collimation error of the level
A soil sample is prepared in the laboratory by mixing a certain amount of dry soil with 10.5 wt% water. The relative density of the grains of the material is equal to 2.7.
Helium enters an adiabatic steady-state nozzle at 200kPa and 124 degrees Celsius and 10m/s. At the nozzle exit the temperature of the helium is 100 degrees Celsius and the pressure = 150 kPa.
1. you are working for urs on a building project in dearborn michigan. you are responsible for the design of the
A man bought a 5% tax-free municipal bond .It cost $1000 and will pay $50 interest each year for 20 years.At maturity the bond returns the original $1000 .If there is 2% annual inflation
The end caps are spherical. The cylinder has length of 30 inc., a diameter of 8 in., and a wall thickness of 0.125 in. Determine the stress in the wall at two points A and B. For each, draw the stresses on a 3-D element. Treat the upper cap as spheri..
He is concerned about the high rolling resistance of the units in the sand (RR factor 250lb/ton). What is the rolling resistance?
A discharge meter to be used in a 40 cm pipeline carrying oil (kinematic viscosity = 10-5 m2/s, density = 860 kg/m3) is to be calibrated by means of a model (1/4 scale) carrying water (T = 20°C and standard atmospheric pressure).
A construction company requires to know how much of additives A and B to use to prepare concrete to be used in a freezing environment (northern location). The concrete mix should contain a minimum concentration of nitrate and sulphate.
Structural Analysis 8th edition 4-40 draw the shear and moment diagrams for each member of the frame. Assume A is a rocker, and D is pinned.
the 70 m tall tower is supported by three cables that exert forces fab fac and fad on it. the magnitude of the force
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