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InertialObservr's profile
〈 Berger | Dillon 〉
〈 Berger | Dillon 〉
〈 Berger | Dillon 〉
@InertialObservr

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〈 Berger | Dillon 〉

@InertialObservr

PhD student of Theoretical Particle Physics @UCIrvine l @NSF Fellow l Physics & Math Animations l Patreon: https://www.patreon.com/inertialobserver …

DC → CA
youtube.com/c/InertialObse…
Joined August 2015

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    1. Brian Skinner‏ @gravity_levity Mar 4
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      Could you pass the qualifying exam for the (high school) USA Physics Olympiad team? Try out this problem that I wrote for last year's exam:pic.twitter.com/w4QXsgOfzS

      17 replies 42 retweets 273 likes
      Show this thread
    2. Brian Skinner‏ @gravity_levity Mar 4
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      The best problems are based on important results in real physics research, and this one is no exception.

      1 reply 0 retweets 27 likes
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    3. Brian Skinner‏ @gravity_levity Mar 4
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      okay, here's the solution: https://www.aapt.org/physicsteam/2020/upload/2019_USAPHO_revised-solutions.pdf … (scroll down to page 14) The key thing to realize is that the voltage across the membrane depends _non-monotonically_ on the charge.

      1 reply 4 retweets 20 likes
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    4. Brian Skinner‏ @gravity_levity Mar 4
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      The voltage is very small when the charge is close to zero, but also when the charge is large enough that the two sides of the membrane are brought very close together. In between those two extremes is a maximum voltage that the membrane can support.

      1 reply 0 retweets 6 likes
      Show this thread
    5. Brian Skinner‏ @gravity_levity Mar 4
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      When the threshold voltage is turned up larger than this maximum, the membrane abruptly collapses to near-zero thickness. I learned about this concept from this research paper: https://journals.aps.org/pre/abstract/10.1103/PhysRevE.80.011112 …

      1 reply 0 retweets 10 likes
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    6. 〈 Berger | Dillon 〉‏ @InertialObservr Mar 4
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      Replying to @gravity_levity

      BRIAN WTF I WAS ALMOST DONEpic.twitter.com/oGh8CkQeNM

      2 replies 0 retweets 16 likes
      〈 Berger | Dillon 〉‏ @InertialObservr Mar 4
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      Replying to @InertialObservr @gravity_levity

      i had to backtrack because i originally had V = E*Δy instead of V=E*y and my solution for V(t) seemed unphysical

      9:06 PM - 4 Mar 2020
      • 3 Likes
      • Qasim . Anthony Gaston
      1 reply 0 retweets 3 likes
        1. New conversation
        1. 〈 Berger | Dillon 〉‏ @InertialObservr Mar 4
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          Replying to @InertialObservr @gravity_levity

          ooh .. setting dV/dQ =0 cause it's a max, that's clever

          1 reply 0 retweets 2 likes
        2. Brian Skinner‏ @gravity_levity Mar 4
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          Replying to @InertialObservr

          the kids love that part

          0 replies 0 retweets 3 likes
          3. End of conversation

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