A Barnes and Books is interested in purchasing a two-story building for a new
retail store. They plan to use the first floor as the display/sales area and the
second floor for storage of inventory. Before buying the property, they have sked
you to verify the building will be safe for the intended use. You must determine if
the interior columns will carry a load of 32 kips (32,000 lbs.), the columns rest on
spread footings which are 4'-0" X 6'-0" X 1'-6" thick. Note the column load does
not include the weight of the footing. If the footing rests on silty sand can the
Does footing safely carry the column load?

Apiston-cylinder with a volume of 0.25 m3 holds 1 kg of air (r 0.287 k/kgk) at a temperature of 100 c. heat transfer to the cylinder causes an isothermal expansion of the piston until the volume triples. how much heat is added to the piston-cylinder?

A3-mm-thick panel of aluminum alloy (k 177 w/m-k, c 875 j/kg-k and ? = 2770 kg/m) is finished on both sides with an epoxy coating that must be cured at or above t,-150°c for at least 5 min. the production line for the curing operation involves two steps: (1) heating in a large oven with air at ts,0-175°c and a convection coefficient of h, 40 w/m2. k, and (2) cooling in a large chamber with air at 25°c and a con- vection coefficient of he 10 w/m2.k. the heating portion of the process is conducted over a time interval te which exceeds the ime required to reach 150°c by 5 min (h = r + 300 s). the coating has an emissivity of ? = 0.8, and the temperatures of the oven and chamber walls are 175 and 25°c, respectively. if the panel is placed in the oven at an initial temperature of 25°c and removed from the chamber at a safe-to-touch tempera ture of 37°c, what is the total elapsed time for the two-step curing operation?

What is the main objective of using reheat rankine cycle?