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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 28 Jun 2017
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    Coin paradox: the moving coin completes one full rotation after only going half the way around the stationary coin. What's the solution?pic.twitter.com/dx2fwUiNph

    6:10 AM - 28 Jun 2017
    • 165 Retweets
    • 323 Likes
    • A Monkey Ana🍀 Blake Herrera Farha Crystal Llorenç Roselló John Anita Michael Shanahan Hojjat Jafary
    49 replies 165 retweets 323 likes
      1. New conversation
      2. Robert Low‏ @RobJLow 28 Jun 2017
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        Replying to @fermatslibrary

        What's the paradox?

        1 reply 0 retweets 7 likes
      3. Danny Kodicek (please follow @QuoraIdiots!)‏ @DannyKodicek 28 Jun 2017
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        Replying to @RobJLow @fermatslibrary

        I think it's that the circumferences of the two coins are the same so you'd expect rolling all the way round to make one rotation

        2 replies 0 retweets 10 likes
      4. 4 more replies
      1. Gramo Phone‏ @gtheodry 28 Jun 2017
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        Replying to @fermatslibrary

        pic.twitter.com/g5SuqdtqPt

        0 replies 7 retweets 72 likes
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      1. Cian O’Connor‏ @CianOConnor 28 Jun 2017
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        Replying to @fermatslibrary

        The coin has revolved but also translated so the point of contact has only made half of a full rotation

        0 replies 1 retweet 24 likes
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      1. Kanttu [HOLR]‏ @kanttu 28 Jun 2017
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        Replying to @fermatslibrary

        The solution is #bitcoin

        0 replies 2 retweets 18 likes
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      1. DℝOℕ∈‏ @d_r_o_n_e 28 Jun 2017
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        Replying to @fermatslibrary

        One full rotation = πd. Coin's path around other coin makes a bigger circle with circumference = 2πd. ∴ Half of this path 2πd/2 is enough.

        0 replies 2 retweets 5 likes
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      1. Anibal Sierra‏ @anibalsierram 28 Jun 2017
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        Replying to @fermatslibrary

        The solution is that the rotation axis of the coin is not in the center of the coin.

        0 replies 0 retweets 8 likes
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      1. Brian Dunning‏Verified account @BrianDunning 28 Jun 2017
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        Replying to @fermatslibrary @SteveMirsky

        [breaks bottle, grabs barstool]

        0 replies 0 retweets 5 likes
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      1. Halil Rıdvan Öz‏ @halilridvanoz 28 Jun 2017
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        Replying to @fermatslibrary

        The center of the moving coin travels a circumference.

        0 replies 0 retweets 5 likes
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      1. Marlon Wayne‏ @m_rlons 28 Jun 2017
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        Replying to @fermatslibrary

        Marlon Wayne Retweeted Fermat's Library

        this onehttps://twitter.com/fermatslibrary/status/877793113275748354 …

        Marlon Wayne added,

        Fermat's Library @fermatslibrary
        Replying to @fermatslibrary
        There is a 1:1 correspondence of points on the 2 circles. The fallacy lies in the assumption that it means the 2 curves must have = length. pic.twitter.com/hp4AL9unEY
        0 replies 1 retweet 2 likes
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