In the following scenario, what could the engineers have done to keep the bridge from collapsing? The Tecoma Hanous project required a bridge to be built over the Columbia River. The engineers accounted for
Besthetic design by building a light roedbed.
Unfortunately, the cables were not designed to withstand high wind speeds, and the bridge collapsed.
Did pechotype of the bridge design and suspend weights from it to te
test its strength
research interent ways to build bridge roadbeds
wsreport on the bridge's esthetic features
Do prototype of the bridge design and perform tests in a wind tunnel

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?