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Steam locomotives require water at such rates that the storage tank behind the locomotive was refilled at 100 mile interverals. one technique used was to place a long tank between the rails and the water the water would be scooped up as the locomotive passed over the tank. The water level of the locomotive storage reservoir is 4 meters above the water level on the rails. find the minimum speed at which the train could pass over the tank and lift water up to teh full 4 m height.
(hint: consider the locomotive to be stationary and neglecting all losses)
Determine the activated sludge aeration volume required to treat 2.64 mgd with a BOD of 120 mg/l based on the criteria of a maximum BOD loading of 40 lb/1000 ft cubed/day and a minimum aeration period of 5 hr.
A particle is traveling along a circular curve having a radius of 13 m. If it has an initial speed of 21m/s and then begins to decrease its speed at the rate of at = (-0.25s)m/s2
For the following position r and the force F, determine the angle and the magnitude of the force along the position vector. Also determine the force vector along the positon vector.
A girder that carries a uniformly distributed dead load of 1.7 K/ft plus its self-weight and three concentrated live loads of 15 kips at quarter points of that 36 ft span is to be sized. using A992 steel, determine the lightest W-shape to carry the l..
Draw a picture of a typical strain gauge and point out the major components. Give a short explanation on the principal behind how a strain gauge works.
A model of a submarine, at 1:15 scale, is to be tested at 0.8 ft/s in a wind tunnel at standard at mospheric pressure, while the prototype will be operated in seawater. Both the air and water are at 10 C (50 F).
Colette Lake has a surface area of 103 ha and a mean depth of 8 m. The pH of the water is 7.6. The lake receives surface water from a lake upstream, rainfall, and diffuse groundwater input. Atmospheric inorganic N deposition is insignificant.
A 1.6-m wide rectangular channel carries 1.8 m3/s at a depth of 0.85 m. The channel undergoes a smooth transition in which the channel bottom rises 15 cm and contracts to a width of 1.3 m. Assuming friction losses are negligible, determine the dep..
The initial waste concentration is 200 mg/l and the following constants have been determined: Ks=50 mg/l; k=5.0 days^-1; kd=0.06 days^-1; Y=0.60 Determine the minimum mean cell residence time, the mean cell residence time you would set for design.
There are many parallels between the industrialization of the United States after Reconstruction and the modernization of the American workforce in the last twenty to thirty (20-30) years as it transitions from industry to a service-oriented econo..
a constant head permeability test was conducted on a clean sand sample. the diameter and length of the test specimen
An Engineer is designing a hydraulic lift with a capacity of 10 tons. The moving parts of this lift weigh 1000 lbf. The lift should raise the load to a height of 6 ft in 20 sec.
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