Find the one-sided Laplace transform of
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Factory-built fireplaces producing gases with a temperature above ____°F at the chimney entrance must meet UL 959.
A. 540 B. 750 C. 820 D. 1000
What type of glove is recommended by some shops when working with heavy suspension components?
A. Synthetic rubber B. Vinyl disposable C. Leather welding gloves D. Gloves should never be worn when working with suspension components
A two-lane highway bridge, supported on two deck trusses that span 64 ft, consists of an 8-in. reinforced concrete slab supported on four steel stringers. The slab is protected by a 2-in. wearing surface of asphalt. The 16-ft-long stringers frame into the floor beams, which in turn transfer the live and dead loads to the panel points of each truss. The truss, bolted to the left abutment at point A, may be treated as pin supported. The right end of the truss rests on an elastomeric pad at G. The elastomeric pad, which permits only horizontal displacement of the joint, can be treated as a roller. The loads shown represent the total dead and live loads. The 18-kip load is an additional live load that represents a heavy wheel load. Determine the force in the lower chord between panel points I
and J, the force in member JB, and the reaction applied to the abutment at support A.
Natural-draft furnaces generally have efficiency ratings of _____
a. below 65 percent b. below 78 percent c. below 85 percent d. 90 percent and above