An interesting lesson. I won't say I completely understand the principle as I was an Ag major at a little Agricultural & Mechanical College in Texas, and as such only had to deal with Cowboy Calculus.
I guess I just wasn't looking at the "big picture" but rather just looking at the hole using logic. And to think all these years I believed it was the contraction of cooling that was the break free force when you heated a stuck bolt/nut, I guess I had it backwards.
That's where I always messed up in math - got the answer right, but was marked wrong for not showing the work, or having used the wrong formula.
Gotta love the the direction some of these threads go. Thanks again for the lesson.
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