35 This is an instance in which we need numbers divided by zero, disappearing, and then reappearing. In this case, the angle change affecting tension and compression does it.
36 See notes on page 213s2. However they do not address this formula. I keep staring at it and can't get the meaning. I think he's talking about how the link between us and the moon seems 0 amount thick and yet there is tension. So the diameter is 0 thick. I guess I do get it. Length is not limited at all by thickness. The reason this formula is here is that there is /0 with no apology or disclaimer.
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