Engineering, 04.03.2022 05:10 DVM117x017
A circular casting is 0. 3 m in diameter and 0. 6 m in length. Another casting of the same metal is elliptical in cross section, with a major-to-minor axis ratio of 2. 5 and has the same length and cross sectional area as the circular casting. Both pieces are cast under the same conditions. What is the ratio of the solidification times of the two castings
Answers: 2
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If you were designing a bumper for a car, would you prefer it to exhibit elastic or plastic deformation? why? consider the functions of a bumper in both a minor "fender-bender" and a major collision.
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Engineering, 04.07.2019 18:10
Aflywheel accelerates for 5 seconds at 2 rad/s2 from a speed of 20 rpm. determine the total number of revolutions of the flywheel during the period of its acceleration. a.5.65 b.8.43 c. 723 d.6.86
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Inadequate stores control is not an obstacle to effective work order system. (clo4) a)-true b)-false
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Engineering, 04.07.2019 18:20
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,-150Ā°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,0-175Ā°c and a convection coefficient of h, 40 w/m2. k, and (2) cooling in a large chamber with air at 25Ā°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 150Ā°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 25Ā°c, respectively. if the panel is placed in the oven at an initial temperature of 25Ā°c and removed from the chamber at a safe-to-touch tempera ture of 37Ā°c, what is the total elapsed time for the two-step curing operation?
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A circular casting is 0. 3 m in diameter and 0. 6 m in length. Another casting of the same metal is...
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