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An old occupational hygiene rule of thumb is that a 10 micrometer (micron) silica particle settles at a rare of 1 ft/min (0.5 cm/s). What is the true settling velocity for such a particle? The density of silica is 2600 kg/cubic meter (2.6 g/cubic centimeter).
A 50-kg iron block at 80C os dropped into an insulated tank that contains 0.5m^3 of liquid water at 25C. determine the temperature when thermal equilibrium is reached.
Determine the maximum hoop stresses on the inside fibers of a rifle barrel which is 3 feet long with an O.D. = 3.0" and an I.D. = 1.0". The internal pressure = 10,000 psi. Use the F.E. reference manual for determining these stresses.
If they are sliding on a smooth horizontal plane with the velocities shown, determine their speeds just after impact. The coefficient of restitution between them is e = 0.6. Disks A and B have a mass of 16kg and 11kg , respectively.
The packed tower was 30 cm in diameter with sampling ports located at packing depths of 0,2,4,6,8,10, and 12 meters. The loading of water to the tower was 0.039 m^3/(m^2/s), and the temperature of groundwater was 10 degrees celcius.
An intake conduit from a well field used to pump ground water is being designed for a town with a population of 23,000 people. Six years ago the population was 21,500 people. a) assuming deometric growth, calculate the population in 50 years
A steady fire with an energy release rate of 500 kW occurs in a room 3m wide, 3m long, and 2.4 m high, with a door opening which is 1.8 m high and 0.6m wide. the ambient temperature is 20 degree celcius.
Based on information provided in the survey bulletins and knowing that the landfill is located in the municipality of Duque de Caxias, on the shore of Guanabara Bay opposite Governor's Island (Galeao Airport)
A rigid rectangular shelf is suspended from a rigid ceiling by mean of four rods of diameter .505 inches. The two rods to the left L1 and L2, are made of steel. The two rods to the right R1 and R2 are made of aluminum.
Tensile tests of structural steel indicate that it fails when the axial tensile strain is 1800mu. Determine the maximum change in length that a 0:25-in diameter structural steel rod in tension can withstand before failure if it is 24 in in length
A distance of 200 ft must be taped in a manner to ensure a standard deviation smaller than ± 0.03 ft. What must be the standard deviation per 100 ft tape length to achieve the desired precision?
Assuming the resulting hole acts like an isentropic converging nozzle with a throat diameter of 0.08 cm, calculate the mass flowrate in kg/s of methane that initially escapes from the tank.
Design a simple horizontal curve to connect two roadway tangents that deflect at an angle chosen between 50 and 75 degrees. Assign a station to the curve PI and select a curvature of 6 degrees.
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