Is the R-value of a wood stud wall with 3-1/2-in-deep studs and 3-1/2-in. fiberglass insulation the same as a cold-formed steel (CFS) wall with 3-1/2-in.-deep studs with the same insulation? Explain your answer.
What will be an ideal response?
The R-value of a wood stud wall is higher than that of a CFS wall because of thermal bridging in a CFS wall, which lowers the wall's R-value.
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?A laminar bottle product can be formed by ____.
A. ?cold parison extrusion B. ?co-extrusion C. ?sheet extrusion D. ?biaxial extrusion
How did the emergence of railroads and the telegraph contribute to the growth of
agribusiness?
a. Improved the infrastructure for conducting business b. Enlarged the definition of “local market.” c. Allowed prices to be set by markets located at the nexus of railroad lines and transmitted quickly to “middlemen.” d. Redefined the market radius in terms of the “iron horse” instead of the farmer’s horse. e. All of the above.
Three transportation projects have been proposed to increase the safety in and around a residential neighborhood. Each project consists of upgrading existing street signing to highly retroreflective sheeting to increase visibility. The following table shows the initial construction costs, annual operating costs, useful life of the sheeting, and the salvage values for each alternative. Assume that the discount rate is 10%. Calculate the present worth for each alternative and determine the preferred project based on the economic criteria.
What will be an ideal response?
Using the stiffness method, analyze the two-span continuous beam shown in Figure P16.1 and draw the shear and moment curves EI is constant.
