In brief, the main difference between quantum and classical physics is the difference between a ramp and a staircase. In classical mechanics, events (in general) are continuous, which is to say they move in smooth, orderly and predicable patterns. Projectile motion is a good example of classical mechanics.
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he was the one who proposed the plum pudding model and he was also the one who discovered the one of the subatomic particle which is the electron.