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fermatslibrary's profile
Fermat's Library
Fermat's Library
Fermat's Library
@fermatslibrary

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Fermat's Library

@fermatslibrary

A platform for illuminating academic papers. We publish an annotated paper every week. Our chrome extension for arXiv: https://fermatslibrary.com/librarian 

fermatslibrary.com
Joined September 2015

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    Fermat's Library‏ @fermatslibrary May 16
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    Fun Fact: If you tie a string tightly around the Earth, then extend it by 2π (~6.3) meters and tie it again, the string will raise exactly 1 meter above the ground! That's because 2πr+2π=2π(r+1)pic.twitter.com/1ip73IeIWa

    6:16 AM - 16 May 2020
    • 615 Retweets
    • 3,727 Likes
    • Sahil Roberto Aparico PC GU Diego Neil Porwal zion sebastian illumi SARP TUNA Gustav Edslev🧢
    62 replies 615 retweets 3,727 likes
      1. New conversation
      2. Bob D‏ @bobathon May 16
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        Replying to @fermatslibrary

        Assuming Earth's surface is convex at 1m resolution

        1 reply 0 retweets 12 likes
      3. 418: No Coffee 4 U  🤖‏ @ramriot May 16
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        Replying to @bobathon @fermatslibrary

        And dry And string with huge tensile strength And that nobody objects

        3 replies 0 retweets 31 likes
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      2. yashpal subedi‏ @ysub80 May 16
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        Replying to @fermatslibrary

        Highly doubted it, calculated it, proved it, still don’t believe it! How can a mere 6m increase in circumference cause a 1m increase in height all around the earth? (Earth’s radius 6400000 does become 6400001 when you add 6.28 to the circumference)

        2 replies 0 retweets 36 likes
      3. Al‏ @aloco4444 May 16
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        Replying to @ysub80 @fermatslibrary

        Because when you think about it 1m is an absolutely insignificant distance compared to the radius of the earth

        1 reply 0 retweets 32 likes
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      2. (Not) Posh Dave‏ @Tringonometry May 16
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        Replying to @fermatslibrary

        Yep. And exactly the same maths works for the Earth, the moon and a beachball.

        1 reply 1 retweet 43 likes
      3. Uvula King‏ @tonyver45 May 17
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        Replying to @Tringonometry @fermatslibrary

        So now I'm gonna go look for the basketball I know is in our messy garage somewhere to test this, albeit with a lot of hand-waving.

        0 replies 0 retweets 1 like
      4. End of conversation
      1. Akbar Chaudry‏ @AkbarChaudry May 16
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        Replying to @fermatslibrary

        Hah nice try! The Earth is flat so you won't be able to

        1 reply 0 retweets 31 likes
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      1. New conversation
      2. Dom‏ @DomDaBomb12 May 16
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        Replying to @fermatslibrary

        Too bad the earth isn’t a perfect sphere :(

        1 reply 0 retweets 4 likes
      3. Bob D‏ @bobathon May 16
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        Replying to @DomDaBomb12 @fermatslibrary

        Doesn't need to be. If you take any shape* and trace out a line that's always a distance d away from it, the difference in perimeters will always be πd. ( *exception: if original shape bends back on itself with concave radius of curvature < d, then new perim < orig perim + πd )

        2 replies 0 retweets 9 likes
      4. 1 more reply
      1. Roger Sauer‏ @rsauer3473 May 16
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        Replying to @fermatslibrary

        Does one use a natural fiber or synthetic string? Doesn’t the string get wet and stretch in the Pacific? How do you account for the Himalayas? Spool must be kinda big, right? How many people to lift the string?

        1 reply 0 retweets 11 likes
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