Why does a piece of chalk produce that hideous squeal? According to the book, The Flying Circus of Physics (With Answers), squealing chalk results from the phenomenon of “stick and slip.” Incorrectly held chalk actually sticks to the blackboard. But when the writer bends the chalk enough, it suddenly slips and vibrates, sporadically striking the chalkboard and producing that squeal we hear. As the vibrations decrease, the friction between the chalk and the board increases until the chalk sticks again and the torture begins once more.
– “Chalk Talk”, Campus Life, December, 1979.
Unfortunately, some people are like that. They seem to drone on and on in the most torturous manner. They strike a chord that penetrates the soul. If you feel you’re bothering people, get out of there. If you are the recipient, then you get out of there.
Let your foot be seldom in your neighbor’s house, lest he have his fill of you and hate you.
Like vinegar to the teeth and smoke to the eyes, so is the sluggard to those who send him.
Give it some thought.
Gary