On Sunday, June 24, 2018 at 4:19:49 PM UTC-4, Fred J. McCall wrote:
"Scott M. Kozel" wrote on Sat, 23 Jun 2018
21:28:31 -0700 (PDT):

On Saturday, June 23, 2018 at 8:34:11 AM UTC-4, Jeff Findley wrote:

That's not what I meant. I meant that you can't know these things
intuitively. The example was a huge bridge made of concrete and steel
that was destroyed by wind. That's not intuitive!


Sure it is. A high enough wind will destroy almost anything.


Except that isn't what destroyed it. Winds when the Tacoma Narrows
Bridge collapsed were 40 MPH and less.

"For over six decades, engineers have studied the collapse of the 1940 Tacoma
Narrows Bridge. The experts disagree, at least on some aspects of the
explanation. A definitive description that meets unanimous agreement has not
been reached. The exact cause of the bridge's failure remains a mystery."

https://www.wsdot.wa.gov/TNBhistory/...e/machine3.htm