A bridge is composed of two trusses whose configuration is shown in Figure P12.38. The trusses are loaded at their top chord panel points by the reactions from a stringer and floor beam system that supports a roadway slab. Draw the influence lines for forces in bars FE and CE. Assume that vehicles move along the center of the roadway so one-half the load is carried by each truss. If a fully loaded motorized ore carrier with a total weight of 70 kN crosses the bridge, determine the maximum live load forces in bars FE and CE. Assume the truck can move in either direction. Consider the possibility of both tension and compression force in each bar.
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A monatomic ideal gas is initially confined in a 0.1 m3 chamber at T = 300 K and P = 0.1 MPa. A second chamber, which has a volume of 0.05 m3, is connected to the first by a valve, and is initially evacuated. The valve is opened and gas flows from the first chamber into the second until the two chambers are in equilibrium. Both chambers and the valve are adiabatic. How much entropy is generated by this process?
A. 3.37 J/mol•K B. 6.74 J/K C. 13.5 J/K D. 12.7 kJ E. Insufficient information to solve
You have been asked to produce continuous corn on five different soils using both no-till and conventional management systems. Yields on the no-till and conventional-till systems are about the same on all but one of the soils. In which of the following suborders would the poor-performing soil most likely be classified?
A) Orthods B) Xerolls C) Udalfs D) Eutrox E) Borolls
Main memory consists of registers and cache RAM
Indicate whether the statement is true or false
A load study that treats the whole house as one big room is called:
A) A unified load calculation. B) A multiroom load calculation. C) A shell load calculation. D) A monolithic load calculation.