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The steel tube shown serves as a compression member. A hollow square cross-section with the same outer dimension, length, and material is to be used instead.
(a) Determine the wall thickness, so that the square and circular cross-sections have the same weight per length (area).
(b) Determine the ratio of the buckling strength of the square cross-section to that of the circular cross-section, assuming they have the same weight per length.
A rectangular open channel with base width of 6-ft conveys 200 CFS. If the slope of the channel is 0.01 ft/ft and n= 0.015, what is the critical depth in the channel?
Plot the adiabatic flame temperature as the percent excess air varies from 10 to 100 percent.
A 200-MW power plant generates electricity with an efficiency of 40%, with 87% of this waste heat removed via cooling water. The average flow in the river to which this cooling water will be discharged is 45 m^3/s, and the plant wishes to discharge i..
A piston cylinder is filled with .85 kg of refrigerant-134a at -10 degrees Celsius. The piston moves freely, and has a mass of of 12 kg and a diameter of 25 cm. Heat is added to the closed system (the refrigerant) until the temperature rises to 15 de..
A quality of water within a piston-cylinder assembly executes a Carnot power cycle. During isothermal expansion, the water is heated from saturated liquid at 50 bar until it is a saturated vapor.
An engineering student has been given the assignment of designing a hydraulic holding system for a hay baling system. The system has four cylinders with 120 mm diameter pistons with a stroke of 0.320 m.
The cross sectional area of each bar is A = 400 mm2 and L = 250 mm. If the cross bar is loaded with a load P = 250 kN, what are the normal stresses in the bars afterward
The Jordan aquifer has been pumped for several decades, yet remains fully saturated. Explain where the water is coming from.
The 3.5-Mg engine is suspended from a spreader beam having a negligible mass and is hoisted by a crane which exerts a force of 40 kN on the hoisting cable. Determine the distance the engine is hoisted in 2.4 s, starting from rest.
At the end of year 1 the piece of equipment is worth $15,000 and at the end of year 2 $13,000, and at the end of the third and final year the salvage value is equal to $9,000.Applying the straight line depreciation, calculate the depreciation expe..
A torque of magnitude T = 1000Nm is applied at D as shown. Knowing that the diameter of shaft AB is 56 mm and that the diameter of shaft CD is 42 mm, determine the maximum shearing stress in (a) shaft AB, (b) shaft CD.
A test of a driver’s perception/reaction time is being conducted on a special testing track with wet pavement and a driving speed of 55 mph. When the driver is sober, a stop can be made just in time to avoid hitting an object that is first visible 52..
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