Comments by "" (@TheDavidlloydjones) on "Lecture 5: Operators and the Schrödinger Equation" video.

  1. C'mon, F=ma is a definition of terms, so no, you don't derive it, but you don't observe it either.
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  2. Thanks: you're confirming my point that F=ma is a mere notion, a structure of thought, and not a Fact of the Universe. As you point out, it's a useful notion -- but only at fairly slow speeds. Cheers, -dlj.
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