AT&T Archives: Similiarities of Wave Behavior
https://m.youtube.com/watch?v=DovunOxlY1k&pp=ygUOYmVsbCBsYWJ...
(I found playing it at 120% speed to be a good balance between comprehension and engagement)
Everything is a hammer, unless it's a screwdriver. Then, it's a chisel.
Everyone should meditate 2 minutes a day, unless he's busy. Then he should meditate 20.
https://en.m.wikipedia.org/wiki/Peening
I dimly recall making an ashtray (hmmm, not sure that would fly these days) in high school metalwork class by beating out a piece of copper sheet with the peen until it was suitably concave.
- Herman Wouk, The Caine Mutiny
This is completely true. 18-20-year-old kids launch and arrest aircraft on a carrier while simultaneously performing an underway replenishment, and it's just another day.
I think their masterpiece is "Basic Hand Tools" a handbook written in plain English that describes the use of practically every hand tool ever invented.
"Basic Hand Tools" on the hammer:
>Whoever conceived the idea of cracking a nut with a rock unknowingly invented a tool. When a later genius tied a stick to the rock, he invented the first hammer. There have been a lot of improvements since that humble beginning.
The modern version "Tools and Their Uses" also covers machine tools but is less fun.