Today's thought: A person who has been punished is not thereby simply less inclined to behave in a given way; at best, he learns how to avoid punishment. ―B.F. Skinner

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Retd. Assistant Professor in Physics
Lahore, Pakistan/Winnipeg, Canada
During 30 years of teaching Physics at college level. Taught more than 3000 students. And thousands more students learned through my Practical Notebook, other written books and online contacts.

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Which apple- inside or outside the scene, produce activity?

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