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Have they finally updated the lectures to use SI units?
Have they finally updated the lectures to use SI units?
As far as I know, the Feynman Lectures have always used SI units.
I just checked Chapter 4, and it has inches and ounces. I could be wrong, since I haven't read it, but I don't see why it would affect understanding of the ideas.
The lectures were given a long time ago. That would be like asking to have a 19th century math textbook rewritten to use modern vector notation.