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An ion exchange column is designed to "soften" water. In a particular application, the bed is filled with particles that are approximately spherical, with dp = 4 mm, and voidage epsilon = 0.30. The bed fills a cylinder with diameter 0.2 m, and is 1.0 m high. Flow is downward by gravity only. What is the flow rate?
a helical compression spring is required to provide a minimum force of 80n at installation and have a working
A 1 kg sphere of iron at 1000 degrees Celsius is quenched in a 10 kg bath of oil at 100 degrees Celsius. Assume that no heat is lost to the surroundings and the temperature of the oil is uniform. Calculate the final equilibrium temperature of the iro..
when the rubber bands of the sling shot are pulled back each rubber band is stretched 3 in. the natural length and the
a radar speed-measurement device for state police is said to have an uncertainty of - 4 when directed straight at an
a rigid tank is divided into two equal parts by a partition. one part of the tank contains 5.2kg of compressed liquid
The bracket plate is 25 mm thick. All rivets are to be of the same size. Load on the bracket, P = 50 kN ; rivet spacing, C = 100 mm; load arm, e = 400 mm. Permissible shear stress is 65 MPa and crushing stress is 120 MPa. Determine the size of the ri..
Based on the average, logarithmic energy loss per collision, approximately how many collisions must a neutron make with Fe-56 to slow from an energy of 1 MeV to 1 eV?
a carnot cycle heat engine using 1 kg of air has the following conditions heat addition beginning at 15 mpa and 1200 k
the annual cost of operating a heat pump at year-end prices is r with units of yr. the costs are expected to inflate at
an array of power transistors dissipating 5 w of power each are to be cooled by mounting them on a 25cm x 25cm square
what fraction n of the weight of the jet airplane is the net thrustnozzle thrust t minus air resistance r required for
An ideal gas contained in a cylinder with a volume of 500m3 is at a pressure of 400Kpa and a temperature of 70 ?C . Pressure in the cylinder is dropped to 200KPa by releasing some gas. If the expansion process of the cylinder is isentropic, find the ..
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