REPOSTING BECAUSE THE COLORING WAS NOT PRESERVED. LET ME USE CAPITAL
LETTERS INSTEAD. ALSO NOTE THE THE ENTIRE POINT 1 IS THE QUOTE.
Something prompted me to read "Physics," published in 1960, by
Physical Science Study Committee. In Chapter 1 I see the following.
1) Take another chain of events. " ... The solid bar [tested on a
stretching machine] slowly yields to the pull. It stretches out like a
piece of taffy, and breaks a little later with a jungle of sound. HOW
does it all work? What holds the bar together? WHY did it fimally
give away? And, by the way, WHY is steel stronger than glass? WHY is
it more dense than aluminum? And WHY it rusts? The words "how" and
"why," which I emphasized, reminded me of a recent suggestion that the
word "why" should not be used by physicist.
2) How to answer the "What hold the bar together," question? It
begins with the word "what."