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1.A steel railroad track (Es=200 GPA, as=11.7x10-6/oC) was laid out at a temperature of 6/oC. Determine the normal stress in the rails when the temperature reaches 48oC assuming that the rails
(a) are welded to form a continuous track
(b) are 10m long with 3 mm gaps between them.
2.A tidal channel, which may be assumed to be rectangular, is 40 m wide and conveys a discharge of 60 m3/s at a depth of 1.52 m. A tidal bore is seen to propagate upstream with a wave speed of 5 m/s. Determine the depth of flow and the discharge immediately after the bore has passed.
Tidal Bore
Vw = c1 - V1 or Vw = c2 + V2
3.The environmental performance of a product depends strongly on the way it used. The use of a ceramic coffee mug in preference to a disposal polystyrene coffee cup has been the subject of considerable discussion. Discuss the advantages and disadvantages of the usage of ceramic coffee mugs.
A vertical pipe of 4ft diameter and 60 ft long has a pressure head of 22.7 ft of water at its upper end. when the flow of water through it is such that the mean velocity is 16 fps, the pipe friction head loss is hf = 2.8 ft.
A concrete mix with a 3-inch slump, w/c ratio of 0.50, and sand with a fineness modulus of 2.4 contains 1700 lb/yd^3 of coarse aggregate. Compute the required weight of coarse aggregate per cubic yard.
A force is specified by the vector F= 120i-160j+80k lb. Calculate the angles made by F with the positive x-,y-, and z- axes.
A rectangular channel of width 12 ft has an upstream slope of 0.02 ft/ft and a downstream slope of 0.0005 ft/ft. Both reaches have lengths of 500 ft. The upstream reach has a Manning's roughness of 0.016 and the downstream reach has a roughness of..
Water at 20 degrees flows at a velocity of (V =) 2 m/s in a (D =) 250-mm diameter horizontal ductile iron pipe. Estimate the friction factor f in the pipe, and state whether the pipe is hydraulically smooth or rough.
The pH of tap water might be adjusted to the 8 to 9 range to reduce the potential for corrosion of metal pipes in the water distribution system.
a 10 mm diameter jet of water is deflected by a homogeneous rectangular block (15 mm by 20 mm by 100 mm) that weighs 6 N. Determine the minimum volume flow rate needed to tip the block over
Does anyone have suggestions for a topic for an engineering ethics presentation? It could be related to any type of engineering (computer, civil, mechanical, electrical, industrial, etc).
the t-component of the force f is known to be 75n. determine the n-component and the magnitude of f.
a model rocket is launched straight upward. its altitude y as a function of time is given by y bt -ct2 where b 82 ms
What are alternative treatment options for the removal of EDCs in tertiary treatment? Be sure to justify any alternative treatment method you propose.
A jet aircraft flies at a speed of 600 mph at an altitude of 40,000 ft. The atmosphere is the standard atmosphere. (1) What is the air pressure outside the aircraft (2) What is the Mach number of the flow around the aircraft
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