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A project consists of replacing the track on an existing railroad line, involving 3000 feet of track. The old track can be removed at a rate of 70 feet per hour. The old railroad ties can be removed at a rate of 200 feet (measured along the track) per hour. The new ties can be installed at a rate of 25 feet per hour and the replacement track can be installed at a rate of 40 feet per hour. Show this operation on a linear schedule. Assume that the minimum float for an activity at any location is one day.
in eight ball a player needs to pocket the eight ball to win the game. assume that the player strikes the cue ball so
A dry cleaning establishment buys 500 gal of carbon tetrachloride every month. as a result of the dry cleaning operation, most of this is lost to the atmosphere and only 50 gal remain to be disposed of.
25 mg chemical Y (log kow = 2.88) is added to a microcosm (i.e., tank) that contains 1 kg soil, 20 L water. Chemical Y has negligible volatility (very low partitioning to air). The soil is mized with water for several days until equilibrium (between ..
The total dissolved inorganic carbon (TIC) of a sample of groundwater is 8.33 mM. The temperature of the aquifer is 15C, the pH is 7.5, and the ionic strength is 0.05 M. What is the H2CO3, HCO3-, CO3 2-, and the partial pressure of CO2
Determine the moment of inertia of the beam's cross-sectional area about the x-axis. Set a = 40mm , b = 130mm , d = 110mm , h = 380mm .
If you have 10 kips acting downward on a foundation and footing, 4 feet long, with uniformly distributed load acting up ward of 2.5 k/ft (soil) also 4 ft long. what are the reactions, shear forces, and bending moments at the tree critical points?
a layer of clay 4m thick lies between two layers of sand each 4m thick the top of thenbspupper layer of sand being
calculate the X, Y and Z coordinates of point B for radial readings taken to B from occupied station A, if the backsight azimuth at A is 25°32'48", the elevation of A = 610.098 m, and hi = 1.45 m.
Total stress analysis is usually preferred for construction of embankments and for excavations, we use effective stress analysis, but why? Total stress is Undrained strength of the soil
Air enters adiobatic compressor at 100kpa, 20 degrees celcius at rate of 0.1 kg/s and exits at 200 degrees celcious. compressor efficiency is 70%. Determine the exit pressure and power required.
The cycle has a thermal efficiency of 35%, and steam changes from saturated vapor at 300 C during the heat addition process. If the mass flow rate of the steam is 2kg/s, determine the net power (kw) output of this engine.
A trapezoidal canal with a bottom width of 1.5m, a side slope Z=1, has a longitudinal slope of 0.4% and n=0.025. If the water depth in section 1 is 1.52 m and in section
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