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George Washington Gale Ferris, Jr., a civil engineering graduate from Rensselaer Polytechnic Institute, built the original Ferris wheel for the 1893 World's Columbian Exposition in Chicago. The wheel, an astounding engineering construction at the time, carried 36 wooden cars, each holding up to 60 passengers, around a circle 76 m in diameter. The cars were loaded 6 at a time, and once all 36 cars were full, the wheel made a complete rotation at constant angular speed in about 2 min. Estimate the amount of work that was required of the machinery to rotate the passengers alone. Assume each passenger had a mass of 58 kg.
An activated sludge process receives 4000m^3 / day containing 120 mg BOD /L from the primary settling tank and 3500 m^3/day Containing 25mg BOD/L from the secondary settling tank.
A conservative tracer is applied to the ground surface and leached through the vadose zone by rainfall. The average volumetric water content is 0.40 over the upper 4 meters and 0.30 over the remaining 3 meters above the water table
Should the soil be compacted at the dry of optimum or at the wet of optimum condition in order to minimize the swelling potential? Briefly explain the reason for your answer.
street nam sizes on the signs at a certain location can be discerned by a person with 20/40 vision from a distance of 300 ft. how much larger should the street names be in order to be legible to a person with 20/50 vision from a distnace of 450 ..
DISCUSS THE LIMITATION AND PROBLEM OF EXTRAPOLATING MECHANICAL PROPERTIES MEASURED ON A SMALL ROCK SAMPLE TO FIELD SITUATIONS.
what is the uniform deterministic arrival rate if the vehicle queue is cleared in 35 minutes after vehicles begin to arrive (in veh/min.)?
A person with a mass of 200kg wearing snow skis is gliding down a long slope at an angle of 20 degrees. Each ski is 200cm long and 5 cm wide. The pressure of the skis on the snow melts a thin layer of water so that a .1mm layer of water exists under ..
Oil flows through the Trans-Alaska pipeline. Because oil is viscous, you might think that the flow is laminar. (a) What is the minimum flowrate (m3/s) for which the flow would likely be laminar.
Determine the actual detention time observed in the field of two circular settling tanks with depth 3.5 m that was designed to have an overflow rate not exceeding 60 m3/m2-day and a detention time of at least 2 hour.
If the elastic limit of steel is 5.0 10^8 Pa, determine the minimum diameter a steel wire can have if it is to support a 69-kg circus performer without its elastic limit being exceeded.
When a pesticide comes into contact with skin, a certain percentage of it is absorbed. The percentage of the pesticide that will be absorbed during a given tie period can be modeled with a lognormal distribution.
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
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